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20230601Exhibits 36-52 - Goralski DI Testimony.pdf
BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CASE NO. IPC-E-23-11 IDAHO POWER COMPANY GORALSKI, DI TESTIMONY EXHIBIT NO. 36 Idaho Power Company Class Cost-of-Service Process Guide Page 1 of 8 Class Cost-of-Service Process Guide The following document is a technical description of Idaho Power Company’s Class Cost-of-Service study. The methodology for separating costs among classes consists of three steps, generally referred to as classification, functionalization, and allocation. In all three steps, recognition is given to how costs are incurred by relating these costs to how the utility operates to provide electrical service. I. PROCESS OVERVIEW A. Classification The Electric Utility Cost Allocation Manual, published in January 1992 by the National Association of Regulatory Utility Commissioners, serves as the basis for the company’s classification process. Classification refers to identifying a cost as being either customer-related, demand-related, or energy- related. These three cost components are used to reflect that an electric utility makes service available to customers continuously; provides as much service, or capacity, as the customer desires at any point in time; and supplies energy to provide customers the ability to do useful work over an extended period of time. These three concepts of availability, capacity, and energy are related to the three components of cost, designated as customer, demand, and energy components, respectively. To classify a particular cost by component, focus is given to whether the cost varies because of changes in the number of customers, changes in demand imposed by the customers, or changes in energy used by the customers. Examples of customer-related costs include the following: x Plant investments and expenses associated with meters and service drops x Meter reading x Billing and collection x Customer information and services x Investment in the distribution system These cost are based on the number of customers, regardless of the amount of energy used, and are generally considered to be fixed costs. Demand-related costs are investments in generation, transmission, and a portion of the distribution plant and the associated operation and maintenance (O&M) expenses necessary to accommodate the maximum demand imposed on the company’s system. Energy-related costs are generally the variable costs associated with operating generating plants, such as fuel. B. Functionalization In addition to classification, costs must be functionalized; that is, identified with utility operating functions. Operating functions recognize different roles played by various facilities in the electric utility system. In the company’s accounts, these roles are recognized to some degree, particularly in recording plant costs as production-, transmission-, or distribution-related. However, this functional breakdown is Exhibit No. 36 Case No. IPC-E-23-11 P. Goralski, IPC Page 1 of 8 Idaho Power Company Class Cost-of-Service Process Guide Page 2 of 8 not sufficient for cost-of-service purposes. Individual plant items are examined and, where possible, associated investment costs are assigned to one or more operating functions, such as substations, primary lines, secondary lines, and meters. This level of functionalization allows costs to be more equitably allocated among classes of customers. C. Allocation and Summarization of Results Once costs are classified and functionalized, they are allocated to rate classes based on the appropriate allocation factors. After individual costs are allocated to the various classes of service, to the company totals these costs as allocated and arrive at a breakdown of utility rate base and expenses by class. The results are summarized to measure adequacy of revenues for each class. The measure of adequacy is typically the rate of return earned on rate base compared to the requested rate of return. II. ASSIGN MODULE AND FUNCTIONALIZED COST MODULE The class cost-of-service model is made of two separate Microsoft® Excel workbooks. The first workbook, called the Assign Module (AS Module), performs the previously described classification and functionalization processes. This module categorizes the Idaho jurisdictional costs identified by the Federal Energy Regulatory Commission (FERC) account into operating functions, such as production, transmission, distribution, metering, customer service, etc. It also categorizes the functional costs into demand-, energy-, and customer-related classifications. For example, the AS Module categorizes the company’s investment in steam plant into the production function and the demand- and energy-related classifications. The second workbook, called the Functionalized Cost Module (FC Module), performs the class allocation process. This module allocates the classified and functionalized costs developed in the AS Module to various customer classes. For example, the FC Module allocates the demand- and energy-related production costs identified in the AS Module to each of the company’s customer classes and special contract customers. Each operation performed by this module is shown as a separate worksheet to make the allocation process transparent and easier to understand. III. CLASSIFICATION A. Steam and Hydro Production In this Class Cost-of-Service study all production plants (steam, hydro, other [including natural-gas fueled and battery-storage capacity], and diesel) have been classified as 100% demand-related, as capital investment in production plants may be considered fixed from a traditional accounting definition. Transmission plants are also classified as demand-related, which is consistent with prior cost-of-service studies. Exhibit No. 36 Case No. IPC-E-23-11 P. Goralski, IPC Page 2 of 8 Idaho Power Company Class Cost-of-Service Process Guide Page 3 of 8 B. PURPA and Purchased-Power Expenses PURPA and purchased-power expenses booked to FERC Account 555 are classified as 100% energy- related as costs may be considered variable from a traditional accounting definition as they vary based on the amount of energy provided. C. Distribution Plant Distribution substation plant accounts 360, 361, and 362 are classified as demand-related. Distribution plant accounts 364, 365, 366, 367, and 368 are classified as either demand-related or customer-related using the same fixed and variable ratio computation method used in the company’s prior general rate case proceedings. The fixed-to-variable ratio is updated according to a system capacity utilization measurement based on a three-year average load duration curve. IV. FUNCTIONALIZATION A. General Plant General plant is functionalized based on total production, transmission, and distribution plant. As a result, a portion of general plant is assigned to each production, transmission, and distribution function based on each function’s proportion to the total. B. Accumulated Provision for Depreciation The accumulated provision for depreciation is functionalized using the resulting functionalization of costs for the appropriate plant item. For example, the accumulated depreciation for steam production plant shown is functionalized based on the functionalization of steam production plant in service. C. Additions to and Reductions from Rate Base Deductions from rate base include customer advances for construction and accumulated deferred income taxes. Customer advances are functionalized based on the distribution plant investment against which the advances apply. Accumulated deferred taxes are functionalized based on total plant investment. Additions to rate base consist of 1) fuel inventory, which is functionalized based on energy production and 2) materials and supplies, which are functionalized based on the appropriate plant function. Energy efficiency program expenses are functionalized consistent with baseload production resources as demand-side management may be considered similar to a supply-side resource. D. Other Operating Revenue Other operating revenue is functionalized based on either the functionalization of the related rate base item or, in the situation where a particular revenue item may be identified with a specific service, the functionalization of the specific service item. E. O&M Expense In general, the basis for the functionalization of O&M expense is the same as that for the associated plant. Exhibit No. 36 Case No. IPC-E-23-11 P. Goralski, IPC Page 3 of 8 Idaho Power Company Class Cost-of-Service Process Guide Page 4 of 8 F. Labor Components For each applicable expense account in each functional group, the labor component is separately functionalized. For example, for Account 535 the labor-related supervision and engineering expense is functionalized based on the cumulative labor as functionalized for accounts 536 through 540. Similarly, the allocation of supervision and engineering associated with hydraulic maintenance expense, Account 541, is based on the composite labor expense for accounts 542 through 545. Total functionalized labor expense serves the additional purpose of functionalizing employee pensions and other labor-related taxes and expenses. G. Depreciation Expense, Taxes Other than Income, and Income Taxes Depreciation expense is functionalized based on the function of the associated plant. Taxes, other than income, are also functionalized based on the function of the source of the tax. Deferred income taxes are functionalized based on plant investment. The functionalization of federal and state income taxes is based on the functionalization of total rate base and expenses. V. ALLOCATION A. Derivation of Peak Demands For customers taking service through Advanced Metering Infrastructure (AMI) and interval meters, system coincident demands are taken directly from their meter read data, as this represents 99.8% of Idaho Power’s customers it is significant enough to average and apply to any non-AMI or non-interval customer. Coincident demands are estimated through the use of system coincident demand factors. These factors are defined as the ratio of the system coincident demand to the population’s average demand. To determine the monthly system coincident peak demands by rate class, each class’s monthly system coincident demand factors from load research are applied to the test-year monthly average demand values for each class. Similarly, a non-coincident (group) demand factor is defined as the ratio of a population’s non-coincident peak demand to the population’s average demand. To determine the monthly non-coincident peak demands by rate class, each class’s monthly non-coincident demand factors from load research are applied to the test-year monthly average demand values for each class. Customers are billed throughout each month and billing periods (cycles). These cycles typically include portions of more than one calendar month. Billing period data is converted into calendar month data using a nonlinear method based on load research data that uses actual daily usage patterns. Total daily consumption is assumed to fluctuate in proportion to the fluctuations in the daily consumption of the load research customers. This methodology captures the effects of weather on energy consumption and improves the process of determining coincident peak demand responsibility. To account for the partial requirement nature of on-site generation customers, measurement of the energy delivered to customers is the basis of energy and system coincident load statistics. On-site generation exports are independently valued outside the Class Cost-of-Service study. Exhibit No. 36 Case No. IPC-E-23-11 P. Goralski, IPC Page 4 of 8 Idaho Power Company Class Cost-of-Service Process Guide Page 5 of 8 B. Marginal Cost Usage While the four coincident peak demands (4CP)/12 monthly coincident demands (12CP) methodology eliminates the need for marginal cost weighting in the allocation of production plant costs, this weighting is necessary to properly seasonalize energy- and transmission-related costs. The use of marginal cost weighting balances costs already incurred and costs to be incurred in the future, and injects into the allocation process recognition of the influence seasonal load profiles have on cost causation. The marginal costs associated with new resource integration are seasonalized based on the monthly peak-hour generation deficiencies that the company expects to encounter during the next five years of the planning period based on the 50th percentile water plus and 50th percentile plus 15.5% reserve margin load criteria used for planning purposes. The relative sizes of the five-year average monthly peak-hour deficiencies identified in the 2021 Integrated Resource Report (IRP) are used to define the share of the annual capacity cost assigned to each month. The marginal costs associated with planned system expansions are seasonalized based on the monthly share of projected peak-hour load growth. The total demand-related transmission marginal costs for each month are then derived by adding the monthly values for both categories of transmission costs. Updated marginal energy costs are calculated by quantifying the difference in net power supply costs resulting from the addition of 50 megawatts (MW) of load to all hours of the company’s base case system simulation run for the five-year planning period. It should be noted that the marginal costs have been used solely for purposes of developing allocation factors and not for purposes of developing the company’s revenue requirement. C. Production Plant Cost Allocation The class cost-of-service study allocates the costs of the company’s generation peaking facilities differently than its base-load resources. Rather than allocating all production plant based on the same allocation factor, this method allocates production plant costs based on the nature of the load being served. Under this approach, production plant costs associated with serving summer peak load are allocated separately from costs associated with serving the base and intermediate load. That is, the costs associated with building and operating the simple cycle combustion turbines, which are used primarily to serve summer peak loads, have been allocated to customers differently than the costs associated with the company’s other generation resources, including the Langley Gulch combined-cycle combustion plant (CCCP). This method allocates production plant costs associated with serving base and intermediate load using an average of 12CP, without marginal cost weighting. Using an un-weighted 12CP allocator is appropriate in this case given that fixed base and intermediate generation costs do not vary greatly between the summer and non-summer seasons. Furthermore, the study allocates fixed generation costs associated with serving peak load using an average of the 4CP occurring in June, July, August, and September. This method of allocation isolates the costs associated with peaking resources and allocates those costs according to the load that is causing the investment. The cost allocation method used in the study is based on the concept that the costs associated with each of the company’s generation resources can be categorized according to the type of loads being served. Utilities typically experience three distinct time-based production costing periods that are driven by customer loads. The costing periods are normally identified as base, intermediate, and peak. The base Exhibit No. 36 Case No. IPC-E-23-11 P. Goralski, IPC Page 5 of 8 Idaho Power Company Class Cost-of-Service Process Guide Page 6 of 8 period is equivalent to a low load or off-peak time period where loads are at the lowest, normally during the nighttime hours. The intermediate time period represents the shoulder hours which are driven by the mid-peak loads that typically occur throughout the winter daytime and in the early morning and late evening during the summer months. The peak category is driven by the peak loads that occur during summer afternoons and evenings. The base and intermediate loads on the company’s system are typically served by the same generation resources. Those two categories have been combined for cost allocation purposes. The generation resources that serve the peak loads (i.e., combustion turbines) are normally only used for that purpose. Consistent with that concept, the costs associated with peak- related resources have been segmented into a second category for cost-allocation purposes. Using this methodology, there is no need for marginal cost weighting because the seasonal nature of the loads is reflected in the allocation factors. The production plant costs that have been classified as serving base and intermediate load are captured in accounts 310 through 316, Steam Production and accounts 330 through 336, Hydraulic Production. Accounts 340-346, Other Production, for the Langley Gulch CCCP, and the Account 363 where the company’s battery storage system is recorded. The costs identified under the Steam Production category represent the company’s investment in coal-fired generation facilities, and the costs identified under the Hydraulic Production category represent the company’s investment in its hydroelectric generation facilities. The majority of costs associated with the company’s coal-fired facilities have been removed from the test year as there are cost recovery mechanisms in place based on the announcement of upcoming retirement. Utilities typically use generation resources to serve customer loads by operating the resources with the lowest operating cost first, and as demand grows, more costly resources are then dispatched. This is no different for Idaho Power. However, since hydroelectric generation is such a significant portion of the company’s resource stack, stream-flow conditions and economics can influence the proportionate share of output provided by steam and hydro resources throughout the year. Since hydroelectric output is highly dependent on stream flows, steam production is ramped up or down according to the production capability of hydro generation. Therefore, throughout the year, hydro- and steam-production plants are used at varying proportions to serve base and intermediate loads according to the production capabilities of the hydro plants. However, the combined monthly output of these two resources does not vary significantly between the summer and non-summer months as does the output of the combustion turbines. Accounts 340 through 346, Other Production, contain the company’s investment in gas-fueled production plant. The production plant investment captured in accounts 340 through 346 represents both the company’s investment in simple-cycle combustion plants (SCCP), and CCCPs. Because these resources are dispatched to meet different types of customer load, they are listed independently between the Langley Gulch CCCP that serves base and intermediate load, while Bennett Mountain and Danksin SCCPs are peak-load serving resources. The investment identified as peaking plant is the investment in combustion-turbine generation resources that were constructed specifically to meet the summer peak loads. In the Functionalized Cost Module, D10BS and D10BNS describe the factors used to allocate the production plant associated with serving the base and intermediate loads. D10P describes the allocation factor used to allocate the production plant associated with serving the peak loads. The D10BS and Exhibit No. 36 Case No. IPC-E-23-11 P. Goralski, IPC Page 6 of 8 Idaho Power Company Class Cost-of-Service Process Guide Page 7 of 8 D10BNS represent the non-weighted average 12 coincident peak demands for the summer and non- summer seasons respectively. D10P represents the non-weighted average four coincident peak demands for June, July, August and September. D. Transmission and Distribution Cost Allocation The company’s approach to cost allocation for transmission and distribution facilities is an effective method for equitably assigning costs to customer classes. Under this method, transmission and distribution (T&D) costs are properly segmented according how costs are imposed on the system. As a result, the cost responsibility of each class can be effectively identified through a combination of direct cost assignment and cost allocation based on the appropriate demand- or customer-based factors. D13 is used to allocate transmission costs to customer classes. The first step in deriving this factor is to calculate ratios based on the sum of the actual coincident peak demands for each customer class. Second, weighted coincident peak demand values are derived by multiplying the actual monthly coincident peak demands by the monthly transmission marginal costs. Corresponding weighted ratios are then calculated for each customer class. Finally, the actual ratios are averaged with the weighted ratios to derive the non-seasonalized transmission allocation factor D13. The company applies this averaging approach as a rate stability measure intended to mitigate any extreme impacts that the marginal costs may have on cost allocation. The capacity components of distribution plant, both primary and secondary, are allocated by the non- coincident group peak demands for each customer class identified as demand allocation factors D20, D30, D50, and D60. The customer components of distribution plant, both primary and secondary, are allocated by the average number of customers identified as customer allocation factors C20, C30, C50 and C60. E. Energy-Related Cost Allocation The energy-related cost allocators, E10S and E10NS, are derived by averaging the normalized energy values for each customer class with the normalized energy values weighted by the marginal energy costs. First, summer and non-summer ratios based on each class’s proportionate share of the total normalized energy usage for the test year are determined. Next, summer and non-summer ratios based on the monthly normalized energy usage for each customer class weighted by the monthly marginal cost are calculated. Finally, these two values are averaged, resulting in the E10S and E10NS allocators used in this study. This averaging approach is consistent with the methodology used in the derivation of the demand-related allocation factor D13. The principal customer accounting expenses which require allocation are meter reading expenses, customer records and collections, and uncollectible accounts. The meter reading and customer records and collection expenses are allocated based upon a review of actual practices of the company in reading meters and preparing monthly bills. The allocation of uncollectible amounts is similarly based upon a review of actual company data. Customer assistance expenses are allocated based on the average number of customers in each class. Exhibit No. 36 Case No. IPC-E-23-11 P. Goralski, IPC Page 7 of 8 Idaho Power Company Class Cost-of-Service Process Guide Page 8 of 8 F. State and Federal Income Tax Allocation The state and federal income taxes for the Idaho jurisdiction are allocated to each customer class and special contract customer according to each class’s allocated share of rate base. Once the state and federal income taxes are allocated to each customer class, they are functionalized based on the functionalization of total rate base and expenses for each class. VI. REVENUE REQUIREMENT AND APPLICATION Once all costs have been properly functionalized, classified, and allocated, the company is able to determine the revenue requirement for each customer class. The sales revenue required includes return on rate base, total operating expenses, and incremental taxes computed using the net-to-gross multiplier. Exhibit No. 36 Case No. IPC-E-23-11 P. Goralski, IPC Page 8 of 8 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CASE NO. IPC-E-23-11 IDAHO POWER COMPANY GORALSKI, DI TESTIMONY EXHIBIT NO. 37 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT 10 * * * TABLE 1 - ELECTRIC PLANT IN SERVICE * * 11 12 INTANGIBLE PLANT 13 301 ORGANIZATION P101P 5,455 1,875 177 1,270 0 14 302 FRANCHISES & CONSENTS P101P 50,540,892 17,368,179 1,636,704 11,766,485 690 15 303 MISCELLANEOUS P101P 50,240,922 17,265,096 1,626,990 11,696,649 686 16 17 TOTAL INTANGIBLE PLANT 100,787,269 18 19 PRODUCTION PLANT 20 310-316 STEAM PRODUCTION PI-S 267,099,895 267,099,895 21 330-336 HYDRAULIC PRODUCTION PI-H 1,058,946,870 1,058,946,870 22 340-346 / OTHER PRODUCTION-BASELOAD PI-S 425,197,122 425,197,122 23 340-346 / OTHER PRODUCTION-PEAKERS PI-O 180,830,345 180,830,345 24 25 TOTAL PRODUCTION PLANT 1,932,074,232 26 27 TRANSMISSION PLANT 28 350 LAND & LAND RIGHTS 29 TRANSMISSION SERVICE T-100 39,364,923 39,364,923 30 DIRECT ASSIGNMENT T-Direct 31 TOTAL ACCOUNT 350 39,364,923 32 33 352 STRUCTURES & IMPROVEMENTS 34 TRANSMISSION SERVICE T-100 96,459,348 96,459,348 35 DIRECT ASSIGNMENT T-Direct 36 TOTAL ACCOUNT 352 96,459,348 - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 1 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 10 * * * TABLE 1 - ELECTRIC PLANT IN SERVICE * * 11 12 INTANGIBLE PLANT 13 301 ORGANIZATION P101P 14 302 FRANCHISES & CONSENTS P101P 15 303 MISCELLANEOUS P101P 16 17 TOTAL INTANGIBLE PLANT 18 19 PRODUCTION PLANT 20 310-316 STEAM PRODUCTION PI-S 21 330-336 HYDRAULIC PRODUCTION PI-H 22 340-346 / OTHER PRODUCTION-BASELOAD PI-S 23 340-346 / OTHER PRODUCTION-PEAKERS PI-O 24 25 TOTAL PRODUCTION PLANT 26 27 TRANSMISSION PLANT 28 350 LAND & LAND RIGHTS 29 TRANSMISSION SERVICE T-100 30 DIRECT ASSIGNMENT T-Direct 31 TOTAL ACCOUNT 350 32 33 352 STRUCTURES & IMPROVEMENTS 34 TRANSMISSION SERVICE T-100 35 DIRECT ASSIGNMENT T-Direct 36 TOTAL ACCOUNT 352 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD 411 19 502 249 31 113 56 31 326 3,805,916 177,495 4,648,412 2,303,818 290,482 1,045,627 518,227 289,784 3,024,081 3,783,327 176,442 4,620,823 2,290,145 288,758 1,039,421 515,152 288,064 3,006,133 * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 2 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 10 * * * TABLE 1 - ELECTRIC PLANT IN SERVICE * * 11 12 INTANGIBLE PLANT 13 301 ORGANIZATION P101P 14 302 FRANCHISES & CONSENTS P101P 15 303 MISCELLANEOUS P101P 16 17 TOTAL INTANGIBLE PLANT 18 19 PRODUCTION PLANT 20 310-316 STEAM PRODUCTION PI-S 21 330-336 HYDRAULIC PRODUCTION PI-H 22 340-346 / OTHER PRODUCTION-BASELOAD PI-S 23 340-346 / OTHER PRODUCTION-PEAKERS PI-O 24 25 TOTAL PRODUCTION PLANT 26 27 TRANSMISSION PLANT 28 350 LAND & LAND RIGHTS 29 TRANSMISSION SERVICE T-100 30 DIRECT ASSIGNMENT T-Direct 31 TOTAL ACCOUNT 350 32 33 352 STRUCTURES & IMPROVEMENTS 34 TRANSMISSION SERVICE T-100 35 DIRECT ASSIGNMENT T-Direct 36 TOTAL ACCOUNT 352 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM 162 32 16 65 110 6 4 1,498,777 297,898 147,642 606,237 1,020,415 54,864 39,157 1,489,881 296,130 146,766 602,639 1,014,358 54,538 38,925 * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 3 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 10 * * * TABLE 1 - ELECTRIC PLANT IN SERVICE * * 11 12 INTANGIBLE PLANT 13 301 ORGANIZATION P101P 14 302 FRANCHISES & CONSENTS P101P 15 303 MISCELLANEOUS P101P 16 17 TOTAL INTANGIBLE PLANT 18 19 PRODUCTION PLANT 20 310-316 STEAM PRODUCTION PI-S 21 330-336 HYDRAULIC PRODUCTION PI-H 22 340-346 / OTHER PRODUCTION-BASELOAD PI-S 23 340-346 / OTHER PRODUCTION-PEAKERS PI-O 24 25 TOTAL PRODUCTION PLANT 26 27 TRANSMISSION PLANT 28 350 LAND & LAND RIGHTS 29 TRANSMISSION SERVICE T-100 30 DIRECT ASSIGNMENT T-Direct 31 TOTAL ACCOUNT 350 32 33 352 STRUCTURES & IMPROVEMENTS 34 TRANSMISSION SERVICE T-100 35 DIRECT ASSIGNMENT T-Direct 36 TOTAL ACCOUNT 352 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 4 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 10 * * * TABLE 1 - ELECTRIC PLANT IN SERVICE * * 11 12 INTANGIBLE PLANT 13 301 ORGANIZATION P101P 14 302 FRANCHISES & CONSENTS P101P 15 303 MISCELLANEOUS P101P 16 17 TOTAL INTANGIBLE PLANT 18 19 PRODUCTION PLANT 20 310-316 STEAM PRODUCTION PI-S 21 330-336 HYDRAULIC PRODUCTION PI-H 22 340-346 / OTHER PRODUCTION-BASELOAD PI-S 23 340-346 / OTHER PRODUCTION-PEAKERS PI-O 24 25 TOTAL PRODUCTION PLANT 26 27 TRANSMISSION PLANT 28 350 LAND & LAND RIGHTS 29 TRANSMISSION SERVICE T-100 30 DIRECT ASSIGNMENT T-Direct 31 TOTAL ACCOUNT 350 32 33 352 STRUCTURES & IMPROVEMENTS 34 TRANSMISSION SERVICE T-100 35 DIRECT ASSIGNMENT T-Direct 36 TOTAL ACCOUNT 352 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 5 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 37 38 353 STATION EQUIPMENT 39 TRANSMISSION SERVICE T-100 449,281,302 449,281,302 40 DIRECT ASSIGNMENT T-Direct 75,100 75,100 41 TOTAL ACCOUNT 353 449,356,402 42 43 44 354 TOWERS & FIXTURES 45 TRANSMISSION SERVICE T-100 227,483,716 227,483,716 46 DIRECT ASSIGNMENT T-Direct 47 TOTAL ACCOUNT 354 227,483,716 48 49 355 POLES & FIXTURES 50 TRANSMISSION SERVICE T-100 226,404,073 226,404,073 51 DIRECT ASSIGNMENT T-Direct 52 TOTAL ACCOUNT 355 226,404,073 53 54 356 OVERHEAD CONDUCTORS & DEVICES 55 TRANSMISSION SERVICE T-100 260,645,887 260,645,887 56 DIRECT ASSIGNMENT T-Direct 1,189 1,189 57 TOTAL ACCOUNT 356 260,647,076 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 6 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 37 38 353 STATION EQUIPMENT 39 TRANSMISSION SERVICE T-100 40 DIRECT ASSIGNMENT T-Direct 41 TOTAL ACCOUNT 353 42 43 44 354 TOWERS & FIXTURES 45 TRANSMISSION SERVICE T-100 46 DIRECT ASSIGNMENT T-Direct 47 TOTAL ACCOUNT 354 48 49 355 POLES & FIXTURES 50 TRANSMISSION SERVICE T-100 51 DIRECT ASSIGNMENT T-Direct 52 TOTAL ACCOUNT 355 53 54 356 OVERHEAD CONDUCTORS & DEVICES 55 TRANSMISSION SERVICE T-100 56 DIRECT ASSIGNMENT T-Direct 57 TOTAL ACCOUNT 356 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 7 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 37 38 353 STATION EQUIPMENT 39 TRANSMISSION SERVICE T-100 40 DIRECT ASSIGNMENT T-Direct 41 TOTAL ACCOUNT 353 42 43 44 354 TOWERS & FIXTURES 45 TRANSMISSION SERVICE T-100 46 DIRECT ASSIGNMENT T-Direct 47 TOTAL ACCOUNT 354 48 49 355 POLES & FIXTURES 50 TRANSMISSION SERVICE T-100 51 DIRECT ASSIGNMENT T-Direct 52 TOTAL ACCOUNT 355 53 54 356 OVERHEAD CONDUCTORS & DEVICES 55 TRANSMISSION SERVICE T-100 56 DIRECT ASSIGNMENT T-Direct 57 TOTAL ACCOUNT 356 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 8 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 37 38 353 STATION EQUIPMENT 39 TRANSMISSION SERVICE T-100 40 DIRECT ASSIGNMENT T-Direct 41 TOTAL ACCOUNT 353 42 43 44 354 TOWERS & FIXTURES 45 TRANSMISSION SERVICE T-100 46 DIRECT ASSIGNMENT T-Direct 47 TOTAL ACCOUNT 354 48 49 355 POLES & FIXTURES 50 TRANSMISSION SERVICE T-100 51 DIRECT ASSIGNMENT T-Direct 52 TOTAL ACCOUNT 355 53 54 356 OVERHEAD CONDUCTORS & DEVICES 55 TRANSMISSION SERVICE T-100 56 DIRECT ASSIGNMENT T-Direct 57 TOTAL ACCOUNT 356 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 9 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 37 38 353 STATION EQUIPMENT 39 TRANSMISSION SERVICE T-100 40 DIRECT ASSIGNMENT T-Direct 41 TOTAL ACCOUNT 353 42 43 44 354 TOWERS & FIXTURES 45 TRANSMISSION SERVICE T-100 46 DIRECT ASSIGNMENT T-Direct 47 TOTAL ACCOUNT 354 48 49 355 POLES & FIXTURES 50 TRANSMISSION SERVICE T-100 51 DIRECT ASSIGNMENT T-Direct 52 TOTAL ACCOUNT 355 53 54 356 OVERHEAD CONDUCTORS & DEVICES 55 TRANSMISSION SERVICE T-100 56 DIRECT ASSIGNMENT T-Direct 57 TOTAL ACCOUNT 356 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 10 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 58 * * * TABLE 1 - ELECTRIC PLANT IN SERVICE * * * 59 60 359 ROADS & TRAILS 61 TRANSMISSION SERVICE T-100 374,346 374,346 62 DIRECT ASSIGNMENT T-Direct 63 TOTAL ACCOUNT 359 374,346 64 TOTAL TRANSMISSION PLANT 1,300,089,883 65 66 67 DISTRIBUTION PLANT 68 360 LAND & LAND RIGHTS 69 DISTRIBUTION FUNCTION D360 9,701,731 70 LESS CIAC CIAC (430,355) 71 TOTAL ACCOUNT 360 9,271,376 72 73 361 STRUCTURES & IMPROVEMENTS 74 DISTRIBUTION FUNCTION D361 66,884,107 75 LESS CIAC CIAC (7,447,616) 76 TOTAL ACCOUNT 361 59,436,491 77 78 362 STATION EQUIPMENT 79 DISTRIBUTION FUNCTION D362 363,519,096 80 LESS CIAC CIAC (34,892,876) 81 TOTAL ACCOUNT 362 328,626,219 82 83 363 STORAGE BATTERY EQUIPMENT 84 TOTAL BATTERY STORAGE EQUIPMEN PI-S 167,669,778 167,669,778 85 86 87 364 POLES, TOWERS & FIXTURES D364 308,137,437 88 365 OVERHEAD CONDUCTORS & DEVICES D365 153,461,377 89 366 UNDERGROUND CONDUIT D366 53,988,992 90 367 UNDERGROUND CONDUCTORS & DEVI D367 333,844,506 91 368 LINE TRANSFORMERS D368 704,503,661 92 369 SERVICES SERVICE 66,979,720 93 370 METERS METER 112,739,963 94 371 INSTALLATIONS ON CUSTOMER PREMI CUSTINS 4,326,265 95 373 STREET LIGHTING SYSTEMS STLIGHT 6,061,607 96 97 TOTAL DISTRIBUTION PLANT 2,309,047,394 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 11 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 58 * * * TABLE 1 - ELECTRIC PLANT IN SERVICE * * * 59 60 359 ROADS & TRAILS 61 TRANSMISSION SERVICE T-100 62 DIRECT ASSIGNMENT T-Direct 63 TOTAL ACCOUNT 359 64 TOTAL TRANSMISSION PLANT 65 66 67 DISTRIBUTION PLANT 68 360 LAND & LAND RIGHTS 69 DISTRIBUTION FUNCTION D360 70 LESS CIAC CIAC 71 TOTAL ACCOUNT 360 72 73 361 STRUCTURES & IMPROVEMENTS 74 DISTRIBUTION FUNCTION D361 75 LESS CIAC CIAC 76 TOTAL ACCOUNT 361 77 78 362 STATION EQUIPMENT 79 DISTRIBUTION FUNCTION D362 80 LESS CIAC CIAC 81 TOTAL ACCOUNT 362 82 83 363 STORAGE BATTERY EQUIPMENT 84 TOTAL BATTERY STORAGE EQUIPMEN PI-S 85 86 87 364 POLES, TOWERS & FIXTURES D364 88 365 OVERHEAD CONDUCTORS & DEVICES D365 89 366 UNDERGROUND CONDUIT D366 90 367 UNDERGROUND CONDUCTORS & DEVI D367 91 368 LINE TRANSFORMERS D368 92 369 SERVICES SERVICE 93 370 METERS METER 94 371 INSTALLATIONS ON CUSTOMER PREMI CUSTINS 95 373 STREET LIGHTING SYSTEMS STLIGHT 96 97 TOTAL DISTRIBUTION PLANT IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * 9,701,676 55 (430,355) 62,888,583 3,995,524 (7,447,616) 347,904,235 15,614,861 (34,892,876) 192,956,701 95,632,049 2,148,004 92,154,627 45,673,126 1,417,325 25,677,526 12,726,142 6,542,372 202,788,361 100,504,758 21,986,065 115,525,520 57,256,069 32,016,611 334,113,916 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 12 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 58 * * * TABLE 1 - ELECTRIC PLANT IN SERVICE * * * 59 60 359 ROADS & TRAILS 61 TRANSMISSION SERVICE T-100 62 DIRECT ASSIGNMENT T-Direct 63 TOTAL ACCOUNT 359 64 TOTAL TRANSMISSION PLANT 65 66 67 DISTRIBUTION PLANT 68 360 LAND & LAND RIGHTS 69 DISTRIBUTION FUNCTION D360 70 LESS CIAC CIAC 71 TOTAL ACCOUNT 360 72 73 361 STRUCTURES & IMPROVEMENTS 74 DISTRIBUTION FUNCTION D361 75 LESS CIAC CIAC 76 TOTAL ACCOUNT 361 77 78 362 STATION EQUIPMENT 79 DISTRIBUTION FUNCTION D362 80 LESS CIAC CIAC 81 TOTAL ACCOUNT 362 82 83 363 STORAGE BATTERY EQUIPMENT 84 TOTAL BATTERY STORAGE EQUIPMEN PI-S 85 86 87 364 POLES, TOWERS & FIXTURES D364 88 365 OVERHEAD CONDUCTORS & DEVICES D365 89 366 UNDERGROUND CONDUIT D366 90 367 UNDERGROUND CONDUCTORS & DEVI D367 91 368 LINE TRANSFORMERS D368 92 369 SERVICES SERVICE 93 370 METERS METER 94 371 INSTALLATIONS ON CUSTOMER PREMI CUSTINS 95 373 STREET LIGHTING SYSTEMS STLIGHT 96 97 TOTAL DISTRIBUTION PLANT IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * 11,634,473 5,766,208 9,505,326 4,710,973 6,046,314 2,996,638 5,726,960 2,838,362 165,591,546 66,979,720 112,739,963 4,326,265 6,061,607 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 13 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 58 * * * TABLE 1 - ELECTRIC PLANT IN SERVICE * * * 59 60 359 ROADS & TRAILS 61 TRANSMISSION SERVICE T-100 62 DIRECT ASSIGNMENT T-Direct 63 TOTAL ACCOUNT 359 64 TOTAL TRANSMISSION PLANT 65 66 67 DISTRIBUTION PLANT 68 360 LAND & LAND RIGHTS 69 DISTRIBUTION FUNCTION D360 70 LESS CIAC CIAC 71 TOTAL ACCOUNT 360 72 73 361 STRUCTURES & IMPROVEMENTS 74 DISTRIBUTION FUNCTION D361 75 LESS CIAC CIAC 76 TOTAL ACCOUNT 361 77 78 362 STATION EQUIPMENT 79 DISTRIBUTION FUNCTION D362 80 LESS CIAC CIAC 81 TOTAL ACCOUNT 362 82 83 363 STORAGE BATTERY EQUIPMENT 84 TOTAL BATTERY STORAGE EQUIPMEN PI-S 85 86 87 364 POLES, TOWERS & FIXTURES D364 88 365 OVERHEAD CONDUCTORS & DEVICES D365 89 366 UNDERGROUND CONDUIT D366 90 367 UNDERGROUND CONDUCTORS & DEVI D367 91 368 LINE TRANSFORMERS D368 92 369 SERVICES SERVICE 93 370 METERS METER 94 371 INSTALLATIONS ON CUSTOMER PREMI CUSTINS 95 373 STREET LIGHTING SYSTEMS STLIGHT 96 97 TOTAL DISTRIBUTION PLANT IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 14 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 58 * * * TABLE 1 - ELECTRIC PLANT IN SERVICE * * * 59 60 359 ROADS & TRAILS 61 TRANSMISSION SERVICE T-100 62 DIRECT ASSIGNMENT T-Direct 63 TOTAL ACCOUNT 359 64 TOTAL TRANSMISSION PLANT 65 66 67 DISTRIBUTION PLANT 68 360 LAND & LAND RIGHTS 69 DISTRIBUTION FUNCTION D360 70 LESS CIAC CIAC 71 TOTAL ACCOUNT 360 72 73 361 STRUCTURES & IMPROVEMENTS 74 DISTRIBUTION FUNCTION D361 75 LESS CIAC CIAC 76 TOTAL ACCOUNT 361 77 78 362 STATION EQUIPMENT 79 DISTRIBUTION FUNCTION D362 80 LESS CIAC CIAC 81 TOTAL ACCOUNT 362 82 83 363 STORAGE BATTERY EQUIPMENT 84 TOTAL BATTERY STORAGE EQUIPMEN PI-S 85 86 87 364 POLES, TOWERS & FIXTURES D364 88 365 OVERHEAD CONDUCTORS & DEVICES D365 89 366 UNDERGROUND CONDUIT D366 90 367 UNDERGROUND CONDUCTORS & DEVI D367 91 368 LINE TRANSFORMERS D368 92 369 SERVICES SERVICE 93 370 METERS METER 94 371 INSTALLATIONS ON CUSTOMER PREMI CUSTINS 95 373 STREET LIGHTING SYSTEMS STLIGHT 96 97 TOTAL DISTRIBUTION PLANT IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 15 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 98 * * * TABLE 1 - ELECTRIC PLANT IN SERVICE * * * 99 100 GENERAL PLANT 101 389 LAND & LAND RIGHTS P-PTD 20,030,220 6,883,307 648,654 4,663,259 274 102 390 STRUCTURES & IMPROVEMENTS P-PTD 169,795,289 58,349,486 5,498,610 39,530,244 2,320 103 391 OFFICE FURNITURE & EQUIPMENT P-PTD 39,636,634 13,620,974 1,283,583 9,227,852 542 104 392 TRANSPORTATION EQUIPMENT P-PTD 114,700,297 39,416,308 3,714,427 26,703,513 1,567 105 393 STORES EQUIPMENT P-PTD 5,238,705 1,800,260 169,649 1,219,629 72 106 394 TOOLS, SHOP & GARAGE EQUIPMENT P-PTD 14,711,683 5,055,612 476,420 3,425,045 201 107 395 LABORATORY EQUIPMENT P-PTD 14,265,521 4,902,290 461,971 3,321,173 195 108 396 POWER OPERATED EQUIPMENT P-PTD 26,388,468 9,068,294 854,558 6,143,531 361 109 397 COMMUNICATIONS EQUIPMENT P-PTD 79,075,745 27,174,070 2,560,770 18,409,719 1,080 110 398 MISCELLANEOUS EQUIPMENT P-PTD 10,910,380 3,749,309 353,319 2,540,059 149 111 112 TOTAL GENERAL PLANT 494,752,941 113 114 TOTAL ELECTRIC PLANT IN SERVICE 6,136,751,718 2,123,568,725 200,116,177 1,438,662,020 84,425 115 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 16 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 98 * * * TABLE 1 - ELECTRIC PLANT IN SERVICE * * * 99 100 GENERAL PLANT 101 389 LAND & LAND RIGHTS P-PTD 102 390 STRUCTURES & IMPROVEMENTS P-PTD 103 391 OFFICE FURNITURE & EQUIPMENT P-PTD 104 392 TRANSPORTATION EQUIPMENT P-PTD 105 393 STORES EQUIPMENT P-PTD 106 394 TOOLS, SHOP & GARAGE EQUIPMENT P-PTD 107 395 LABORATORY EQUIPMENT P-PTD 108 396 POWER OPERATED EQUIPMENT P-PTD 109 397 COMMUNICATIONS EQUIPMENT P-PTD 110 398 MISCELLANEOUS EQUIPMENT P-PTD 111 112 TOTAL GENERAL PLANT 113 114 TOTAL ELECTRIC PLANT IN SERVICE 115 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * 1,508,350 70,344 1,842,245 913,043 115,123 414,400 205,382 114,846 1,198,495 12,786,212 596,306 15,616,631 7,739,821 975,893 3,512,849 1,741,017 973,547 10,159,590 2,984,785 139,200 3,645,512 1,806,767 227,810 820,032 406,419 227,263 2,371,632 8,637,356 402,817 10,549,363 5,228,413 659,236 2,373,004 1,176,094 657,652 6,863,017 394,494 18,398 481,821 238,797 30,109 108,382 53,716 30,037 313,454 1,107,844 51,666 1,353,082 670,606 84,555 304,366 150,848 84,352 880,264 1,074,246 50,099 1,312,047 650,269 81,991 295,136 146,273 81,794 853,568 1,987,149 92,674 2,427,034 1,202,872 151,667 545,944 270,577 151,302 1,578,937 5,954,696 277,707 7,272,856 3,604,530 454,485 1,635,977 810,813 453,393 4,731,445 821,592 38,316 1,003,464 497,331 62,707 225,722 111,871 62,556 652,815 465,340,871 21,701,923 (42,770,847) 568,351,006 281,682,735 35,516,616 127,846,492 63,362,516 35,431,232 369,747,673 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 17 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 98 * * * TABLE 1 - ELECTRIC PLANT IN SERVICE * * * 99 100 GENERAL PLANT 101 389 LAND & LAND RIGHTS P-PTD 102 390 STRUCTURES & IMPROVEMENTS P-PTD 103 391 OFFICE FURNITURE & EQUIPMENT P-PTD 104 392 TRANSPORTATION EQUIPMENT P-PTD 105 393 STORES EQUIPMENT P-PTD 106 394 TOOLS, SHOP & GARAGE EQUIPMENT P-PTD 107 395 LABORATORY EQUIPMENT P-PTD 108 396 POWER OPERATED EQUIPMENT P-PTD 109 397 COMMUNICATIONS EQUIPMENT P-PTD 110 398 MISCELLANEOUS EQUIPMENT P-PTD 111 112 TOTAL GENERAL PLANT 113 114 TOTAL ELECTRIC PLANT IN SERVICE 115 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * 593,991 118,062 58,513 240,262 404,408 21,744 15,519 5,035,235 1,000,806 496,014 2,036,690 3,428,147 184,319 131,551 1,175,414 233,626 115,788 475,440 800,259 43,027 30,709 3,401,407 676,066 335,068 1,375,827 2,315,786 124,511 88,866 155,352 30,878 15,304 62,838 105,769 5,687 4,059 436,271 86,714 42,976 176,466 297,027 15,970 11,398 423,040 84,084 41,673 171,115 288,019 15,486 11,052 782,543 155,539 77,087 316,529 532,780 28,646 20,445 2,344,971 466,088 231,000 948,511 1,596,530 85,839 61,265 323,544 64,308 31,872 130,870 220,279 11,844 8,453 183,252,136 36,423,303 18,051,900 74,123,210 124,763,852 6,708,087 4,787,668 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 18 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 98 * * * TABLE 1 - ELECTRIC PLANT IN SERVICE * * * 99 100 GENERAL PLANT 101 389 LAND & LAND RIGHTS P-PTD 102 390 STRUCTURES & IMPROVEMENTS P-PTD 103 391 OFFICE FURNITURE & EQUIPMENT P-PTD 104 392 TRANSPORTATION EQUIPMENT P-PTD 105 393 STORES EQUIPMENT P-PTD 106 394 TOOLS, SHOP & GARAGE EQUIPMENT P-PTD 107 395 LABORATORY EQUIPMENT P-PTD 108 396 POWER OPERATED EQUIPMENT P-PTD 109 397 COMMUNICATIONS EQUIPMENT P-PTD 110 398 MISCELLANEOUS EQUIPMENT P-PTD 111 112 TOTAL GENERAL PLANT 113 114 TOTAL ELECTRIC PLANT IN SERVICE 115 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 19 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 98 * * * TABLE 1 - ELECTRIC PLANT IN SERVICE * * * 99 100 GENERAL PLANT 101 389 LAND & LAND RIGHTS P-PTD 102 390 STRUCTURES & IMPROVEMENTS P-PTD 103 391 OFFICE FURNITURE & EQUIPMENT P-PTD 104 392 TRANSPORTATION EQUIPMENT P-PTD 105 393 STORES EQUIPMENT P-PTD 106 394 TOOLS, SHOP & GARAGE EQUIPMENT P-PTD 107 395 LABORATORY EQUIPMENT P-PTD 108 396 POWER OPERATED EQUIPMENT P-PTD 109 397 COMMUNICATIONS EQUIPMENT P-PTD 110 398 MISCELLANEOUS EQUIPMENT P-PTD 111 112 TOTAL GENERAL PLANT 113 114 TOTAL ELECTRIC PLANT IN SERVICE 115 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 20 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 116 * * * TABLE 2 - ACCUMULATED PROVISION FOR DEPRECIATION * * 117 118 PRODUCTION PLANT 119 310-316 STEAM PRODUCTION PI-S 144,967,130 144,967,130 120 330-336 HYDRAULIC PRODUCTION PI-H 489,515,669 489,515,669 121 340-346 OTHER PRODUCTION (BASELOAD) PI-S 92,073,267 92,073,267 122 340-346 OTHER PRODUCTION (PEAKERS) PI-O 65,021,376 65,021,376 123 TOTAL PRODUCTION PLANT 791,577,442 124 125 TRANSMISSION PLANT 126 350 LAND & LAND RIGHTS T-350 9,785,205 9,785,205 127 352 STRUCTURES & IMPROVEMENTS T-352 32,854,058 32,854,058 128 353 STATION EQUIPMENT T-353 118,232,894 118,213,134 19,760 129 354 TOWERS & FIXTURES T-354 77,166,051 77,166,051 130 355 POLES & FIXTURES T-355 77,284,679 77,284,679 131 356 OVERHEAD CONDUCTORS & DEVICES T-356 86,639,325 86,638,930 395 132 359 ROADS & TRAILS T-359 285,269 285,269 133 TOTAL TRANSMISSION PLANT 402,247,480 134 135 DISTRIBUTION PLANT 136 360 LAND & LAND RIGHTS D360N 231,204 137 361 STRUCTURES & IMPROVEMENTS D361N 15,985,978 138 362 STATION EQUIPMENT D362N 69,206,444 139 363 STORAGE BATTERY EQUIPMENT PI-S 3,403,730 3,403,730 140 364 POLES, TOWERS & FIXTURES D364 133,426,728 141 365 OVERHEAD CONDUCTORS & DEVICES D365 53,361,193 142 366 UNDERGROUND CONDUIT D366 18,584,970 143 367 UNDERGROUND CONDUCTORS & DEVI D367 103,959,562 144 368 LINE TRANSFORMERS D368 188,773,843 145 369 SERVICES SERVICE 43,720,575 146 370 METERS METER 36,077,317 147 371 INSTALLATIONS ON CUSTOMER PREMI CUSTINS 1,103,966 148 373 STREET LIGHTING SYSTEMS STLIGHT 31,698 149 TOTAL DISTRIBUTION PLANT 667,867,210 150 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 21 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 116 * * * TABLE 2 - ACCUMULATED PROVISION FOR DEPRECIAT 117 118 PRODUCTION PLANT 119 310-316 STEAM PRODUCTION PI-S 120 330-336 HYDRAULIC PRODUCTION PI-H 121 340-346 OTHER PRODUCTION (BASELOAD) PI-S 122 340-346 OTHER PRODUCTION (PEAKERS) PI-O 123 TOTAL PRODUCTION PLANT 124 125 TRANSMISSION PLANT 126 350 LAND & LAND RIGHTS T-350 127 352 STRUCTURES & IMPROVEMENTS T-352 128 353 STATION EQUIPMENT T-353 129 354 TOWERS & FIXTURES T-354 130 355 POLES & FIXTURES T-355 131 356 OVERHEAD CONDUCTORS & DEVICES T-356 132 359 ROADS & TRAILS T-359 133 TOTAL TRANSMISSION PLANT 134 135 DISTRIBUTION PLANT 136 360 LAND & LAND RIGHTS D360N 137 361 STRUCTURES & IMPROVEMENTS D361N 138 362 STATION EQUIPMENT D362N 139 363 STORAGE BATTERY EQUIPMENT PI-S 140 364 POLES, TOWERS & FIXTURES D364 141 365 OVERHEAD CONDUCTORS & DEVICES D365 142 366 UNDERGROUND CONDUIT D366 143 367 UNDERGROUND CONDUCTORS & DEVI D367 144 368 LINE TRANSFORMERS D368 145 369 SERVICES SERVICE 146 370 METERS METER 147 371 INSTALLATIONS ON CUSTOMER PREMI CUSTINS 148 373 STREET LIGHTING SYSTEMS STLIGHT 149 TOTAL DISTRIBUTION PLANT 150 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * 231,203 1 15,835,296 150,682 68,442,087 764,358 83,552,267 41,409,676 930,108 32,043,769 15,881,341 492,829 8,839,136 4,380,800 2,252,122 63,148,528 31,297,297 6,846,486 30,955,405 15,341,933 8,578,946 89,526,813 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 22 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 116 * * * TABLE 2 - ACCUMULATED PROVISION FOR DEPRECIAT 117 118 PRODUCTION PLANT 119 310-316 STEAM PRODUCTION PI-S 120 330-336 HYDRAULIC PRODUCTION PI-H 121 340-346 OTHER PRODUCTION (BASELOAD) PI-S 122 340-346 OTHER PRODUCTION (PEAKERS) PI-O 123 TOTAL PRODUCTION PLANT 124 125 TRANSMISSION PLANT 126 350 LAND & LAND RIGHTS T-350 127 352 STRUCTURES & IMPROVEMENTS T-352 128 353 STATION EQUIPMENT T-353 129 354 TOWERS & FIXTURES T-354 130 355 POLES & FIXTURES T-355 131 356 OVERHEAD CONDUCTORS & DEVICES T-356 132 359 ROADS & TRAILS T-359 133 TOTAL TRANSMISSION PLANT 134 135 DISTRIBUTION PLANT 136 360 LAND & LAND RIGHTS D360N 137 361 STRUCTURES & IMPROVEMENTS D361N 138 362 STATION EQUIPMENT D362N 139 363 STORAGE BATTERY EQUIPMENT PI-S 140 364 POLES, TOWERS & FIXTURES D364 141 365 OVERHEAD CONDUCTORS & DEVICES D365 142 366 UNDERGROUND CONDUIT D366 143 367 UNDERGROUND CONDUCTORS & DEVI D367 144 368 LINE TRANSFORMERS D368 145 369 SERVICES SERVICE 146 370 METERS METER 147 371 INSTALLATIONS ON CUSTOMER PREMI CUSTINS 148 373 STREET LIGHTING SYSTEMS STLIGHT 149 TOTAL DISTRIBUTION PLANT 150 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * 5,037,848 2,496,828 3,305,167 1,638,087 2,081,361 1,031,552 1,783,382 883,869 44,370,745 43,720,575 36,077,317 1,103,966 31,698 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 23 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 116 * * * TABLE 2 - ACCUMULATED PROVISION FOR DEPRECIAT 117 118 PRODUCTION PLANT 119 310-316 STEAM PRODUCTION PI-S 120 330-336 HYDRAULIC PRODUCTION PI-H 121 340-346 OTHER PRODUCTION (BASELOAD) PI-S 122 340-346 OTHER PRODUCTION (PEAKERS) PI-O 123 TOTAL PRODUCTION PLANT 124 125 TRANSMISSION PLANT 126 350 LAND & LAND RIGHTS T-350 127 352 STRUCTURES & IMPROVEMENTS T-352 128 353 STATION EQUIPMENT T-353 129 354 TOWERS & FIXTURES T-354 130 355 POLES & FIXTURES T-355 131 356 OVERHEAD CONDUCTORS & DEVICES T-356 132 359 ROADS & TRAILS T-359 133 TOTAL TRANSMISSION PLANT 134 135 DISTRIBUTION PLANT 136 360 LAND & LAND RIGHTS D360N 137 361 STRUCTURES & IMPROVEMENTS D361N 138 362 STATION EQUIPMENT D362N 139 363 STORAGE BATTERY EQUIPMENT PI-S 140 364 POLES, TOWERS & FIXTURES D364 141 365 OVERHEAD CONDUCTORS & DEVICES D365 142 366 UNDERGROUND CONDUIT D366 143 367 UNDERGROUND CONDUCTORS & DEVI D367 144 368 LINE TRANSFORMERS D368 145 369 SERVICES SERVICE 146 370 METERS METER 147 371 INSTALLATIONS ON CUSTOMER PREMI CUSTINS 148 373 STREET LIGHTING SYSTEMS STLIGHT 149 TOTAL DISTRIBUTION PLANT 150 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 24 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 116 * * * TABLE 2 - ACCUMULATED PROVISION FOR DEPRECIAT 117 118 PRODUCTION PLANT 119 310-316 STEAM PRODUCTION PI-S 120 330-336 HYDRAULIC PRODUCTION PI-H 121 340-346 OTHER PRODUCTION (BASELOAD) PI-S 122 340-346 OTHER PRODUCTION (PEAKERS) PI-O 123 TOTAL PRODUCTION PLANT 124 125 TRANSMISSION PLANT 126 350 LAND & LAND RIGHTS T-350 127 352 STRUCTURES & IMPROVEMENTS T-352 128 353 STATION EQUIPMENT T-353 129 354 TOWERS & FIXTURES T-354 130 355 POLES & FIXTURES T-355 131 356 OVERHEAD CONDUCTORS & DEVICES T-356 132 359 ROADS & TRAILS T-359 133 TOTAL TRANSMISSION PLANT 134 135 DISTRIBUTION PLANT 136 360 LAND & LAND RIGHTS D360N 137 361 STRUCTURES & IMPROVEMENTS D361N 138 362 STATION EQUIPMENT D362N 139 363 STORAGE BATTERY EQUIPMENT PI-S 140 364 POLES, TOWERS & FIXTURES D364 141 365 OVERHEAD CONDUCTORS & DEVICES D365 142 366 UNDERGROUND CONDUIT D366 143 367 UNDERGROUND CONDUCTORS & DEVI D367 144 368 LINE TRANSFORMERS D368 145 369 SERVICES SERVICE 146 370 METERS METER 147 371 INSTALLATIONS ON CUSTOMER PREMI CUSTINS 148 373 STREET LIGHTING SYSTEMS STLIGHT 149 TOTAL DISTRIBUTION PLANT 150 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 25 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 151 * * * TABLE 2 - ACCUMULATED PROVISION FOR DEPRECIATION * * 152 153 GENERAL PLANT 154 389 LAND & LAND RIGHTS P-PTD 155 390 STRUCTURES & IMPROVEMENTS P-PTD 34,477,345 11,848,004 1,116,506 8,026,712 471 156 391 OFFICE FURNITURE & EQUIPMENT P-PTD 17,941,991 6,165,695 581,029 4,177,096 245 157 392 TRANSPORTATION EQUIPMENT P-PTD 22,933,175 7,880,896 742,662 5,339,100 313 158 393 STORES EQUIPMENT P-PTD 1,404,733 482,731 45,491 327,038 19 159 394 TOOLS, SHOP & GARAGE EQUIPMENT P-PTD 4,808,200 1,652,319 155,708 1,119,403 66 160 395 LABORATORY EQUIPMENT P-PTD 6,562,478 2,255,170 212,518 1,527,818 90 161 396 POWER OPERATED EQUIPMENT P-PTD 5,184,149 1,781,513 167,882 1,206,928 71 162 397 COMMUNICATIONS EQUIPMENT P-PTD 31,998,730 10,996,238 1,036,239 7,449,663 437 163 398 MISCELLANEOUS EQUIPMENT P-PTD 4,205,307 1,445,137 136,184 979,043 57 164 TOTAL GENERAL PLANT 129,516,109 165 166 MORTIZATION OF DISALLOWED COSTS P101P 3,158,453 1,085,390 102,283 735,323 43 167 168 TOTAL ACCUM PROVISION DEPRECIATION 1,994,366,693 775,552,890 69,317,877 433,115,447 21,968 169 170 MORTIZATION OF OTHER UTILITY PLANT 171 302/FRANCHISES AND CONSENTS P101P 18,012,048 6,189,770 583,298 4,193,406 246 172 303/MISCELLANEOUS INTANGIBLE PLA PI-H 22,131,338 22,131,338 173 174 TOTAL AM0RT OF OTHER UTILITY PLANT 40,143,386 28,321,108 583,298 4,193,406 246 175 176 TOTAL ACCUM PROVISION FOR DEPR 177 & AMORTIZATION OF OTHER UTILITY PLANT 2,034,510,078 803,873,997 69,901,175 437,308,854 22,214 178 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 26 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 151 * * * TABLE 2 - ACCUMULATED PROVISION FOR DEPRECIAT 152 153 GENERAL PLANT 154 389 LAND & LAND RIGHTS P-PTD 155 390 STRUCTURES & IMPROVEMENTS P-PTD 156 391 OFFICE FURNITURE & EQUIPMENT P-PTD 157 392 TRANSPORTATION EQUIPMENT P-PTD 158 393 STORES EQUIPMENT P-PTD 159 394 TOOLS, SHOP & GARAGE EQUIPMENT P-PTD 160 395 LABORATORY EQUIPMENT P-PTD 161 396 POWER OPERATED EQUIPMENT P-PTD 162 397 COMMUNICATIONS EQUIPMENT P-PTD 163 398 MISCELLANEOUS EQUIPMENT P-PTD 164 TOTAL GENERAL PLANT 165 166 MORTIZATION OF DISALLOWED COSTS P101P 167 168 TOTAL ACCUM PROVISION DEPRECIATION 169 170 MORTIZATION OF OTHER UTILITY PLANT 171 302/FRANCHISES AND CONSENTS P101P 172 303/MISCELLANEOUS INTANGIBLE PLA PI-H 173 174 TOTAL AM0RT OF OTHER UTILITY PLANT 175 176 TOTAL ACCUM PROVISION FOR DEPR 177 & AMORTIZATION OF OTHER UTILITY PLANT 178 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * 2,596,271 121,081 3,170,995 1,571,589 198,157 713,293 353,518 197,681 2,062,929 1,351,098 63,011 1,650,184 817,854 103,121 371,197 183,970 102,873 1,073,547 1,726,953 80,539 2,109,240 1,045,369 131,808 474,458 235,148 131,491 1,372,191 105,782 4,933 129,198 64,032 8,074 29,062 14,404 8,054 84,051 362,075 16,886 442,226 219,173 27,635 99,476 49,301 27,569 287,695 494,179 23,047 603,573 299,139 37,718 135,769 67,289 37,627 392,662 390,386 18,206 476,803 236,310 29,796 107,253 53,156 29,724 310,190 2,409,623 112,377 2,943,028 1,458,606 183,912 662,013 328,103 183,470 1,914,623 316,675 14,769 386,776 191,692 24,170 87,002 43,120 24,112 251,622 237,843 11,092 290,493 143,973 18,153 65,344 32,386 18,109 188,984 94,499,470 1,380,982 199,786,215 99,016,852 11,284,088 33,700,274 16,702,329 9,339,656 97,465,309 1,356,374 63,257 1,656,627 821,048 103,524 372,646 184,689 103,275 1,077,739 1,356,374 63,257 1,656,627 821,048 103,524 372,646 184,689 103,275 1,077,739 95,855,844 1,444,239 201,442,843 99,837,900 11,387,611 34,072,920 16,887,017 9,442,930 98,543,048 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 27 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 151 * * * TABLE 2 - ACCUMULATED PROVISION FOR DEPRECIAT 152 153 GENERAL PLANT 154 389 LAND & LAND RIGHTS P-PTD 155 390 STRUCTURES & IMPROVEMENTS P-PTD 156 391 OFFICE FURNITURE & EQUIPMENT P-PTD 157 392 TRANSPORTATION EQUIPMENT P-PTD 158 393 STORES EQUIPMENT P-PTD 159 394 TOOLS, SHOP & GARAGE EQUIPMENT P-PTD 160 395 LABORATORY EQUIPMENT P-PTD 161 396 POWER OPERATED EQUIPMENT P-PTD 162 397 COMMUNICATIONS EQUIPMENT P-PTD 163 398 MISCELLANEOUS EQUIPMENT P-PTD 164 TOTAL GENERAL PLANT 165 166 MORTIZATION OF DISALLOWED COSTS P101P 167 168 TOTAL ACCUM PROVISION DEPRECIATION 169 170 MORTIZATION OF OTHER UTILITY PLANT 171 302/FRANCHISES AND CONSENTS P101P 172 303/MISCELLANEOUS INTANGIBLE PLA PI-H 173 174 TOTAL AM0RT OF OTHER UTILITY PLANT 175 176 TOTAL ACCUM PROVISION FOR DEPR 177 & AMORTIZATION OF OTHER UTILITY PLANT 178 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * 1,022,417 203,216 100,717 413,555 696,094 37,426 26,712 532,065 105,754 52,413 215,214 362,247 19,477 13,901 680,077 135,173 66,993 275,083 463,018 24,895 17,768 41,657 8,280 4,104 16,850 28,361 1,525 1,088 142,586 28,340 14,046 57,674 97,077 5,219 3,725 194,609 38,681 19,171 78,717 132,496 7,124 5,084 153,735 30,556 15,144 62,184 104,667 5,628 4,016 948,914 188,607 93,476 383,824 646,051 34,736 24,791 124,707 24,787 12,285 50,443 84,905 4,565 3,258 93,663 18,617 9,227 37,886 63,769 3,429 2,447 48,305,175 12,989,768 6,437,911 45,312,003 38,756,001 175,721 1,206,758 534,143 106,166 52,618 216,054 363,661 19,553 13,955 534,143 106,166 52,618 216,054 363,661 19,553 13,955 48,839,317 13,095,935 6,490,529 45,528,057 39,119,662 195,273 1,220,713 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 28 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 151 * * * TABLE 2 - ACCUMULATED PROVISION FOR DEPRECIAT 152 153 GENERAL PLANT 154 389 LAND & LAND RIGHTS P-PTD 155 390 STRUCTURES & IMPROVEMENTS P-PTD 156 391 OFFICE FURNITURE & EQUIPMENT P-PTD 157 392 TRANSPORTATION EQUIPMENT P-PTD 158 393 STORES EQUIPMENT P-PTD 159 394 TOOLS, SHOP & GARAGE EQUIPMENT P-PTD 160 395 LABORATORY EQUIPMENT P-PTD 161 396 POWER OPERATED EQUIPMENT P-PTD 162 397 COMMUNICATIONS EQUIPMENT P-PTD 163 398 MISCELLANEOUS EQUIPMENT P-PTD 164 TOTAL GENERAL PLANT 165 166 MORTIZATION OF DISALLOWED COSTS P101P 167 168 TOTAL ACCUM PROVISION DEPRECIATION 169 170 MORTIZATION OF OTHER UTILITY PLANT 171 302/FRANCHISES AND CONSENTS P101P 172 303/MISCELLANEOUS INTANGIBLE PLA PI-H 173 174 TOTAL AM0RT OF OTHER UTILITY PLANT 175 176 TOTAL ACCUM PROVISION FOR DEPR 177 & AMORTIZATION OF OTHER UTILITY PLANT 178 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 29 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 151 * * * TABLE 2 - ACCUMULATED PROVISION FOR DEPRECIAT 152 153 GENERAL PLANT 154 389 LAND & LAND RIGHTS P-PTD 155 390 STRUCTURES & IMPROVEMENTS P-PTD 156 391 OFFICE FURNITURE & EQUIPMENT P-PTD 157 392 TRANSPORTATION EQUIPMENT P-PTD 158 393 STORES EQUIPMENT P-PTD 159 394 TOOLS, SHOP & GARAGE EQUIPMENT P-PTD 160 395 LABORATORY EQUIPMENT P-PTD 161 396 POWER OPERATED EQUIPMENT P-PTD 162 397 COMMUNICATIONS EQUIPMENT P-PTD 163 398 MISCELLANEOUS EQUIPMENT P-PTD 164 TOTAL GENERAL PLANT 165 166 MORTIZATION OF DISALLOWED COSTS P101P 167 168 TOTAL ACCUM PROVISION DEPRECIATION 169 170 MORTIZATION OF OTHER UTILITY PLANT 171 302/FRANCHISES AND CONSENTS P101P 172 303/MISCELLANEOUS INTANGIBLE PLA PI-H 173 174 TOTAL AM0RT OF OTHER UTILITY PLANT 175 176 TOTAL ACCUM PROVISION FOR DEPR 177 & AMORTIZATION OF OTHER UTILITY PLANT 178 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 30 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 179 * * * TABLE 3 - ADDITIONS & DELETIONS TO RATE BASE * * 180 181 NET ELECTRIC PLANT IN SERVICE 4,102,241,639 1,319,694,727 130,215,002 1,001,353,167 62,211 182 LESS: 183 252 CUSTOMER ADVANCES FOR CONSTRUCTION 184 POWER SUPPL PI-SHO 185 OTHER CUSTADV 7,387,459 186 TOTAL CUST ADV FOR CONSTRUCTION 7,387,459 187 188 CCUMULATED DEFERRED INCOME TAXES 189 DIT - CUST ADVANCE RELATED CUSTADV (1,793,446) 190 DIT - OTHER P111P (17,318,189) (6,010,954) (566,447) (4,072,263) (239) 191 281 CCELERATED AMORTIZATION P111P 192 282 OTHER PROPERT P111P 378,580,157 131,401,024 12,382,679 89,020,742 5,224 193 283 OTHER P111P 5,992,853 2,080,054 196,015 1,409,182 83 194 TOTAL ACCUMULATED DEFERRED INCOME TAXE 365,461,375 127,470,124 12,012,248 86,357,660 5,068 195 196 NET ELECTRIC PLANT IN SERVICE 3,729,392,805 1,192,224,603 118,202,754 914,995,506 57,144 197 DD: 198 WORKING CAPITAL 199 151 FUEL INVENTOR KWH-S 23,609,967 23,609,967 200 154 PLANT MATERIALS & SUPPLIES 201 PRODUCTION - GENERAL PI-SHO 15,478,739 14,145,707 1,333,032 202 TRANSMISSION - GENERAL T-PLT 14,093,970 14,093,143 827 203 DISTRIBUTION - GENERAL D3601 52,809,487 204 OTHER-UNCLASSIFIED P110P 4,097,928 1,408,237 132,706 954,043 56 205 TOTAL ACCOUNT 154 86,480,124 206 165 PREPAID ITEMS 207 AD VALOREM TAXES LABOR 208 OTHER PROD-RELATED PP LABOR 209 INSURANCE LABOR 210 PENSION EXPENSE LABOR 211 PREPAID RETIREE BENEFITS LABOR 212 MISC PREPAYMENTS LABOR 213 TOTAL ACCOUNT 165 LABOR 214 WORKING CASH ALLOWANCE O&M-T 0 0 0 0 0 0 215 216 TOTAL WORKING CAPITAL 110,090,091 15,553,944 1,465,738 23,609,967 15,047,187 883 217 218 NET ELECTRIC PLANT IN SERVICE 3,839,482,895 1,207,778,547 119,668,492 23,609,967 930,042,693 58,027 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 31 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 179 * * * TABLE 3 - ADDITIONS & DELETIONS TO RATE BASE * * 180 181 NET ELECTRIC PLANT IN SERVICE 182 LESS: 183 252 CUSTOMER ADVANCES FOR CONSTRUCTION 184 POWER SUPPL PI-SHO 185 OTHER CUSTADV 186 TOTAL CUST ADV FOR CONSTRUCTION 187 188 CCUMULATED DEFERRED INCOME TAXES 189 DIT - CUST ADVANCE RELATED CUSTADV 190 DIT - OTHER P111P 191 281 CCELERATED AMORTIZATION P111P 192 282 OTHER PROPERT P111P 193 283 OTHER P111P 194 TOTAL ACCUMULATED DEFERRED INCOME TAXE 195 196 NET ELECTRIC PLANT IN SERVICE 197 DD: 198 WORKING CAPITAL 199 151 FUEL INVENTOR KWH-S 200 154 PLANT MATERIALS & SUPPLIES 201 PRODUCTION - GENERAL PI-SHO 202 TRANSMISSION - GENERAL T-PLT 203 DISTRIBUTION - GENERAL D3601 204 OTHER-UNCLASSIFIED P110P 205 TOTAL ACCOUNT 154 206 165 PREPAID ITEMS 207 AD VALOREM TAXES LABOR 208 OTHER PROD-RELATED PP LABOR 209 INSURANCE LABOR 210 PENSION EXPENSE LABOR 211 PREPAID RETIREE BENEFITS LABOR 212 MISC PREPAYMENTS LABOR 213 TOTAL ACCOUNT 165 LABOR 214 WORKING CASH ALLOWANCE O&M-T 215 216 TOTAL WORKING CAPITAL 217 218 NET ELECTRIC PLANT IN SERVICE IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * 369,485,027 20,257,685 (42,770,847) 366,908,163 181,844,835 24,129,005 93,773,572 46,475,498 25,988,301 271,204,625 3,181,235 1,576,665 128,427 63,650 395,224 3,181,235 1,576,665 128,427 63,650 395,224 (772,305) (382,765) (31,178) (15,452) (95,948) (1,188,578) (16,532) (1,608,769) (797,329) (100,533) (361,881) (179,353) (100,291) (1,046,604) 25,982,622 361,384 35,168,113 17,429,810 2,197,678 7,910,815 3,920,711 2,192,394 22,879,044 411,300 5,721 556,705 275,911 34,789 125,227 62,064 34,705 362,171 25,205,345 350,573 33,343,743 16,525,627 2,131,934 7,642,983 3,787,970 2,126,808 22,098,663 344,279,682 19,907,111 (42,770,847) 330,383,185 163,742,544 21,997,071 86,002,162 42,623,878 23,861,493 248,710,738 10,166,936 474,152 12,417,539 6,154,307 775,980 2,793,237 1,384,367 774,114 8,078,381 308,589 14,392 376,900 186,797 23,553 84,781 42,019 23,496 245,197 0 0 0 0 0 0 0 0 0 10,475,525 488,543 12,794,439 6,341,104 799,533 2,878,018 1,426,386 797,611 8,323,578 354,755,208 20,395,655 (42,770,847) 343,177,624 170,083,647 22,796,604 88,880,179 44,050,264 24,659,103 257,034,316 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 32 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 179 * * * TABLE 3 - ADDITIONS & DELETIONS TO RATE BASE * * 180 181 NET ELECTRIC PLANT IN SERVICE 182 LESS: 183 252 CUSTOMER ADVANCES FOR CONSTRUCTION 184 POWER SUPPL PI-SHO 185 OTHER CUSTADV 186 TOTAL CUST ADV FOR CONSTRUCTION 187 188 CCUMULATED DEFERRED INCOME TAXES 189 DIT - CUST ADVANCE RELATED CUSTADV 190 DIT - OTHER P111P 191 281 CCELERATED AMORTIZATION P111P 192 282 OTHER PROPERT P111P 193 283 OTHER P111P 194 TOTAL ACCUMULATED DEFERRED INCOME TAXE 195 196 NET ELECTRIC PLANT IN SERVICE 197 DD: 198 WORKING CAPITAL 199 151 FUEL INVENTOR KWH-S 200 154 PLANT MATERIALS & SUPPLIES 201 PRODUCTION - GENERAL PI-SHO 202 TRANSMISSION - GENERAL T-PLT 203 DISTRIBUTION - GENERAL D3601 204 OTHER-UNCLASSIFIED P110P 205 TOTAL ACCOUNT 154 206 165 PREPAID ITEMS 207 AD VALOREM TAXES LABOR 208 OTHER PROD-RELATED PP LABOR 209 INSURANCE LABOR 210 PENSION EXPENSE LABOR 211 PREPAID RETIREE BENEFITS LABOR 212 MISC PREPAYMENTS LABOR 213 TOTAL ACCOUNT 165 LABOR 214 WORKING CASH ALLOWANCE O&M-T 215 216 TOTAL WORKING CAPITAL 217 218 NET ELECTRIC PLANT IN SERVICE IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * 134,412,819 23,327,369 11,561,371 28,595,152 85,644,190 6,512,814 3,566,955 195,879 536,323 265,809 1,032,307 706 10,184 1,051 195,879 536,323 265,809 1,032,307 706 10,184 1,051 (47,553) (130,202) (64,530) (250,612) (171) (2,472) (255) (518,712) (103,099) (51,098) (209,812) (353,155) (18,988) (13,552) 11,339,175 2,253,781 1,117,006 4,586,555 7,720,069 415,079 296,249 179,497 35,677 17,682 72,604 122,207 6,571 4,690 10,952,407 2,056,156 1,019,060 4,198,735 7,488,950 400,190 287,131 123,264,532 20,734,890 10,276,502 23,364,110 78,154,534 6,102,439 3,278,773 4,003,759 795,790 394,404 1,619,471 2,725,886 146,561 104,603 121,523 24,154 11,971 49,155 82,737 4,448 3,175 0 0 0 0 0 0 0 4,125,282 819,944 406,376 1,668,625 2,808,623 151,009 107,778 127,389,815 21,554,833 10,682,878 25,032,735 80,963,156 6,253,449 3,386,550 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 33 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 179 * * * TABLE 3 - ADDITIONS & DELETIONS TO RATE BASE * * 180 181 NET ELECTRIC PLANT IN SERVICE 182 LESS: 183 252 CUSTOMER ADVANCES FOR CONSTRUCTION 184 POWER SUPPL PI-SHO 185 OTHER CUSTADV 186 TOTAL CUST ADV FOR CONSTRUCTION 187 188 CCUMULATED DEFERRED INCOME TAXES 189 DIT - CUST ADVANCE RELATED CUSTADV 190 DIT - OTHER P111P 191 281 CCELERATED AMORTIZATION P111P 192 282 OTHER PROPERT P111P 193 283 OTHER P111P 194 TOTAL ACCUMULATED DEFERRED INCOME TAXE 195 196 NET ELECTRIC PLANT IN SERVICE 197 DD: 198 WORKING CAPITAL 199 151 FUEL INVENTOR KWH-S 200 154 PLANT MATERIALS & SUPPLIES 201 PRODUCTION - GENERAL PI-SHO 202 TRANSMISSION - GENERAL T-PLT 203 DISTRIBUTION - GENERAL D3601 204 OTHER-UNCLASSIFIED P110P 205 TOTAL ACCOUNT 154 206 165 PREPAID ITEMS 207 AD VALOREM TAXES LABOR 208 OTHER PROD-RELATED PP LABOR 209 INSURANCE LABOR 210 PENSION EXPENSE LABOR 211 PREPAID RETIREE BENEFITS LABOR 212 MISC PREPAYMENTS LABOR 213 TOTAL ACCOUNT 165 LABOR 214 WORKING CASH ALLOWANCE O&M-T 215 216 TOTAL WORKING CAPITAL 217 218 NET ELECTRIC PLANT IN SERVICE IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * 0 0 0 0 0 0 0 0 0 0 0 0 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 34 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 179 * * * TABLE 3 - ADDITIONS & DELETIONS TO RATE BASE * * 180 181 NET ELECTRIC PLANT IN SERVICE 182 LESS: 183 252 CUSTOMER ADVANCES FOR CONSTRUCTION 184 POWER SUPPL PI-SHO 185 OTHER CUSTADV 186 TOTAL CUST ADV FOR CONSTRUCTION 187 188 CCUMULATED DEFERRED INCOME TAXES 189 DIT - CUST ADVANCE RELATED CUSTADV 190 DIT - OTHER P111P 191 281 CCELERATED AMORTIZATION P111P 192 282 OTHER PROPERT P111P 193 283 OTHER P111P 194 TOTAL ACCUMULATED DEFERRED INCOME TAXE 195 196 NET ELECTRIC PLANT IN SERVICE 197 DD: 198 WORKING CAPITAL 199 151 FUEL INVENTOR KWH-S 200 154 PLANT MATERIALS & SUPPLIES 201 PRODUCTION - GENERAL PI-SHO 202 TRANSMISSION - GENERAL T-PLT 203 DISTRIBUTION - GENERAL D3601 204 OTHER-UNCLASSIFIED P110P 205 TOTAL ACCOUNT 154 206 165 PREPAID ITEMS 207 AD VALOREM TAXES LABOR 208 OTHER PROD-RELATED PP LABOR 209 INSURANCE LABOR 210 PENSION EXPENSE LABOR 211 PREPAID RETIREE BENEFITS LABOR 212 MISC PREPAYMENTS LABOR 213 TOTAL ACCOUNT 165 LABOR 214 WORKING CASH ALLOWANCE O&M-T 215 216 TOTAL WORKING CAPITAL 217 218 NET ELECTRIC PLANT IN SERVICE IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - 0 0 0 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 35 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 219 * * * TABLE 3 - ADDITIONS & DELETIONS TO RATE BASE * * 220 221 NET ELECTRIC PLANT IN SERVICE 3,839,482,895 1,207,778,547 119,668,492 23,609,967 930,042,693 58,027 222 DD: 223 105 PLANT HELD FOR FUTURE USE 224 HYDRAULIC PRODUCTION PI-H 0 0 225 TRANS LAND & LAND RIGHTS T-350 2,640,221 2,640,221 226 TRANS STRUCTURES & IMPROVEMENT T-352 227 TRANS STATION EQUIPMENT T-353 228 DIST LAND & LAND RIGHTS D360 5,316,603 229 DIST STRUCTURES & IMPROVEMENTS D361 230 DIST STATIONS EQUIPMENT D362 231 GEN LAND & LAND RIGHTS P-PTD 232 GEN STRUCTURES & IMPROVEMENTS P-PTD 233 COMMUNICATIONS EQUIPMENT P-PTD 234 TOTAL PLANT HELD FOR FUTURE USE 7,956,825 0 2,640,221 235 236 ELECTRIC PLANT ACQUISITION ADJUSTMENT T-100 628,247 628,247 237 238 DEFERRED PROGRAMS 239 182 / CONSERVATION PROGRAMS 240 IDAHO DEFERRED CONSERVATION PI-H 241 OREGON DEFERRED CONSERVATION PI-H 242 OTHER DEFERRED CONSERVATION PI-H 243 TOTAL CONSERVATION 244 182 / MISC. OTHER REGULATORY ASSETS 245 CUB FUND INTEREST (OPUC 15-399) NONE 246 M. FALLS BOND REFINANCING PI-H 70,000 70,000 247 SFAS 87 CAPITALIZED PENSION - OPUC NONE 248 CLOUD COMPUTING - (IPUC Order 3470 P101P 1,006,327 345,820 32,589 234,284 14 249 WILDFIRE MITIGATION (IPUC Order 3507 P-PTD 13,056,171 4,486,702 422,808 3,039,623 178 250 SIEMENS LTP RATE BASE (IPUC Order 3 PI-OS 12,207,705 8,565,092 3,642,613 251 SIEMENS LTP DEFERRED RATE BASE (I PI-OS 8,181,006 5,739,905 2,441,101 252 SIEMENS LTP RATE BASE (OPUC ORDE NONE 253 SIEMENS LTP DEFERRED RATE BASE (NONE 254 TOTAL OTHER REG ASSETS 34,521,209 255 186 / MISC. OTHER DEFERRED PROGRAMS T-PLT 256 254 / JIM BRIDGER PLANT END OF LIFE DEPR - OP NONE 257 RECONNECT FEES - (OPUC ADV 16-09) NONE 258 TOTAL DEFERRED PROGRAMS 34,521,209 19,207,519 6,539,110 3,273,907 192 259 260 DEVELOPMENT OF SUBSIDIARY RATE BASE 261 123 INVESTMENT IN IERCO KWH-S 14,887,547 14,887,547 262 186 PREPAID COAL ROYALTIES KWH-S 571,281 571,281 263 233 NOTES PAYABLE TO SUBSIDIAR KWH-S 14,521,817 14,521,817 264 TOTAL SUBSIDIARY RATE BASE 29,980,646 29,980,646 265 266 TOTAL COMBINED RATE BASE 3,912,569,823 1,226,986,067 126,207,603 53,590,613 936,585,068 58,219 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 36 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 219 * * * TABLE 3 - ADDITIONS & DELETIONS TO RATE BASE * * 220 221 NET ELECTRIC PLANT IN SERVICE 222 DD: 223 105 PLANT HELD FOR FUTURE USE 224 HYDRAULIC PRODUCTION PI-H 225 TRANS LAND & LAND RIGHTS T-350 226 TRANS STRUCTURES & IMPROVEMENT T-352 227 TRANS STATION EQUIPMENT T-353 228 DIST LAND & LAND RIGHTS D360 229 DIST STRUCTURES & IMPROVEMENTS D361 230 DIST STATIONS EQUIPMENT D362 231 GEN LAND & LAND RIGHTS P-PTD 232 GEN STRUCTURES & IMPROVEMENTS P-PTD 233 COMMUNICATIONS EQUIPMENT P-PTD 234 TOTAL PLANT HELD FOR FUTURE USE 235 236 ELECTRIC PLANT ACQUISITION ADJUSTMENT T-100 237 238 DEFERRED PROGRAMS 239 182 / CONSERVATION PROGRAMS 240 IDAHO DEFERRED CONSERVATION PI-H 241 OREGON DEFERRED CONSERVATION PI-H 242 OTHER DEFERRED CONSERVATION PI-H 243 TOTAL CONSERVATION 244 182 / MISC. OTHER REGULATORY ASSETS 245 CUB FUND INTEREST (OPUC 15-399) NONE 246 M. FALLS BOND REFINANCING PI-H 247 SFAS 87 CAPITALIZED PENSION - OPUC NONE 248 CLOUD COMPUTING - (IPUC Order 3470 P101P 249 WILDFIRE MITIGATION (IPUC Order 3507 P-PTD 250 SIEMENS LTP RATE BASE (IPUC Order 3 PI-OS 251 SIEMENS LTP DEFERRED RATE BASE (I PI-OS 252 SIEMENS LTP RATE BASE (OPUC ORDE NONE 253 SIEMENS LTP DEFERRED RATE BASE (NONE 254 TOTAL OTHER REG ASSETS 255 186 / MISC. OTHER DEFERRED PROGRAMS T-PLT 256 254 / JIM BRIDGER PLANT END OF LIFE DEPR - OP NONE 257 RECONNECT FEES - (OPUC ADV 16-09) NONE 258 TOTAL DEFERRED PROGRAMS 259 260 DEVELOPMENT OF SUBSIDIARY RATE BASE 261 123 INVESTMENT IN IERCO KWH-S 262 186 PREPAID COAL ROYALTIES KWH-S 263 233 NOTES PAYABLE TO SUBSIDIAR KWH-S 264 TOTAL SUBSIDIARY RATE BASE 265 266 TOTAL COMBINED RATE BASE IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * 354,755,208 20,395,655 (42,770,847) 343,177,624 170,083,647 22,796,604 88,880,179 44,050,264 24,659,103 257,034,316 5,316,573 30 5,316,573 30 75,780 3,534 92,555 45,872 5,784 20,820 10,319 5,770 60,213 983,178 45,852 1,200,819 595,143 75,040 270,116 133,873 74,860 781,207 1,058,958 49,386 1,293,374 641,014 80,824 290,935 144,192 80,629 841,420 361,130,739 20,445,071 (42,770,847) 344,470,998 170,724,661 22,877,428 89,171,115 44,194,456 24,739,733 257,875,737Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 37 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 219 * * * TABLE 3 - ADDITIONS & DELETIONS TO RATE BASE * * 220 221 NET ELECTRIC PLANT IN SERVICE 222 DD: 223 105 PLANT HELD FOR FUTURE USE 224 HYDRAULIC PRODUCTION PI-H 225 TRANS LAND & LAND RIGHTS T-350 226 TRANS STRUCTURES & IMPROVEMENT T-352 227 TRANS STATION EQUIPMENT T-353 228 DIST LAND & LAND RIGHTS D360 229 DIST STRUCTURES & IMPROVEMENTS D361 230 DIST STATIONS EQUIPMENT D362 231 GEN LAND & LAND RIGHTS P-PTD 232 GEN STRUCTURES & IMPROVEMENTS P-PTD 233 COMMUNICATIONS EQUIPMENT P-PTD 234 TOTAL PLANT HELD FOR FUTURE USE 235 236 ELECTRIC PLANT ACQUISITION ADJUSTMENT T-100 237 238 DEFERRED PROGRAMS 239 182 / CONSERVATION PROGRAMS 240 IDAHO DEFERRED CONSERVATION PI-H 241 OREGON DEFERRED CONSERVATION PI-H 242 OTHER DEFERRED CONSERVATION PI-H 243 TOTAL CONSERVATION 244 182 / MISC. OTHER REGULATORY ASSETS 245 CUB FUND INTEREST (OPUC 15-399) NONE 246 M. FALLS BOND REFINANCING PI-H 247 SFAS 87 CAPITALIZED PENSION - OPUC NONE 248 CLOUD COMPUTING - (IPUC Order 3470 P101P 249 WILDFIRE MITIGATION (IPUC Order 3507 P-PTD 250 SIEMENS LTP RATE BASE (IPUC Order 3 PI-OS 251 SIEMENS LTP DEFERRED RATE BASE (I PI-OS 252 SIEMENS LTP RATE BASE (OPUC ORDE NONE 253 SIEMENS LTP DEFERRED RATE BASE (NONE 254 TOTAL OTHER REG ASSETS 255 186 / MISC. OTHER DEFERRED PROGRAMS T-PLT 256 254 / JIM BRIDGER PLANT END OF LIFE DEPR - OP NONE 257 RECONNECT FEES - (OPUC ADV 16-09) NONE 258 TOTAL DEFERRED PROGRAMS 259 260 DEVELOPMENT OF SUBSIDIARY RATE BASE 261 123 INVESTMENT IN IERCO KWH-S 262 186 PREPAID COAL ROYALTIES KWH-S 263 233 NOTES PAYABLE TO SUBSIDIAR KWH-S 264 TOTAL SUBSIDIARY RATE BASE 265 266 TOTAL COMBINED RATE BASE IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * 127,389,815 21,554,833 10,682,878 25,032,735 80,963,156 6,253,449 3,386,550 29,842 5,931 2,940 12,071 20,318 1,092 780 387,177 76,956 38,140 156,608 263,603 14,173 10,115 417,020 82,887 41,080 168,679 283,920 15,265 10,895 127,806,834 21,637,720 10,723,958 25,201,414 81,247,077 6,268,714 3,397,445 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 38 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 219 * * * TABLE 3 - ADDITIONS & DELETIONS TO RATE BASE * * 220 221 NET ELECTRIC PLANT IN SERVICE 222 DD: 223 105 PLANT HELD FOR FUTURE USE 224 HYDRAULIC PRODUCTION PI-H 225 TRANS LAND & LAND RIGHTS T-350 226 TRANS STRUCTURES & IMPROVEMENT T-352 227 TRANS STATION EQUIPMENT T-353 228 DIST LAND & LAND RIGHTS D360 229 DIST STRUCTURES & IMPROVEMENTS D361 230 DIST STATIONS EQUIPMENT D362 231 GEN LAND & LAND RIGHTS P-PTD 232 GEN STRUCTURES & IMPROVEMENTS P-PTD 233 COMMUNICATIONS EQUIPMENT P-PTD 234 TOTAL PLANT HELD FOR FUTURE USE 235 236 ELECTRIC PLANT ACQUISITION ADJUSTMENT T-100 237 238 DEFERRED PROGRAMS 239 182 / CONSERVATION PROGRAMS 240 IDAHO DEFERRED CONSERVATION PI-H 241 OREGON DEFERRED CONSERVATION PI-H 242 OTHER DEFERRED CONSERVATION PI-H 243 TOTAL CONSERVATION 244 182 / MISC. OTHER REGULATORY ASSETS 245 CUB FUND INTEREST (OPUC 15-399) NONE 246 M. FALLS BOND REFINANCING PI-H 247 SFAS 87 CAPITALIZED PENSION - OPUC NONE 248 CLOUD COMPUTING - (IPUC Order 3470 P101P 249 WILDFIRE MITIGATION (IPUC Order 3507 P-PTD 250 SIEMENS LTP RATE BASE (IPUC Order 3 PI-OS 251 SIEMENS LTP DEFERRED RATE BASE (I PI-OS 252 SIEMENS LTP RATE BASE (OPUC ORDE NONE 253 SIEMENS LTP DEFERRED RATE BASE (NONE 254 TOTAL OTHER REG ASSETS 255 186 / MISC. OTHER DEFERRED PROGRAMS T-PLT 256 254 / JIM BRIDGER PLANT END OF LIFE DEPR - OP NONE 257 RECONNECT FEES - (OPUC ADV 16-09) NONE 258 TOTAL DEFERRED PROGRAMS 259 260 DEVELOPMENT OF SUBSIDIARY RATE BASE 261 123 INVESTMENT IN IERCO KWH-S 262 186 PREPAID COAL ROYALTIES KWH-S 263 233 NOTES PAYABLE TO SUBSIDIAR KWH-S 264 TOTAL SUBSIDIARY RATE BASE 265 266 TOTAL COMBINED RATE BASE IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * 0 0 0 0 0 0 0 0 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 39 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 219 * * * TABLE 3 - ADDITIONS & DELETIONS TO RATE BASE * * 220 221 NET ELECTRIC PLANT IN SERVICE 222 DD: 223 105 PLANT HELD FOR FUTURE USE 224 HYDRAULIC PRODUCTION PI-H 225 TRANS LAND & LAND RIGHTS T-350 226 TRANS STRUCTURES & IMPROVEMENT T-352 227 TRANS STATION EQUIPMENT T-353 228 DIST LAND & LAND RIGHTS D360 229 DIST STRUCTURES & IMPROVEMENTS D361 230 DIST STATIONS EQUIPMENT D362 231 GEN LAND & LAND RIGHTS P-PTD 232 GEN STRUCTURES & IMPROVEMENTS P-PTD 233 COMMUNICATIONS EQUIPMENT P-PTD 234 TOTAL PLANT HELD FOR FUTURE USE 235 236 ELECTRIC PLANT ACQUISITION ADJUSTMENT T-100 237 238 DEFERRED PROGRAMS 239 182 / CONSERVATION PROGRAMS 240 IDAHO DEFERRED CONSERVATION PI-H 241 OREGON DEFERRED CONSERVATION PI-H 242 OTHER DEFERRED CONSERVATION PI-H 243 TOTAL CONSERVATION 244 182 / MISC. OTHER REGULATORY ASSETS 245 CUB FUND INTEREST (OPUC 15-399) NONE 246 M. FALLS BOND REFINANCING PI-H 247 SFAS 87 CAPITALIZED PENSION - OPUC NONE 248 CLOUD COMPUTING - (IPUC Order 3470 P101P 249 WILDFIRE MITIGATION (IPUC Order 3507 P-PTD 250 SIEMENS LTP RATE BASE (IPUC Order 3 PI-OS 251 SIEMENS LTP DEFERRED RATE BASE (I PI-OS 252 SIEMENS LTP RATE BASE (OPUC ORDE NONE 253 SIEMENS LTP DEFERRED RATE BASE (NONE 254 TOTAL OTHER REG ASSETS 255 186 / MISC. OTHER DEFERRED PROGRAMS T-PLT 256 254 / JIM BRIDGER PLANT END OF LIFE DEPR - OP NONE 257 RECONNECT FEES - (OPUC ADV 16-09) NONE 258 TOTAL DEFERRED PROGRAMS 259 260 DEVELOPMENT OF SUBSIDIARY RATE BASE 261 123 INVESTMENT IN IERCO KWH-S 262 186 PREPAID COAL ROYALTIES KWH-S 263 233 NOTES PAYABLE TO SUBSIDIAR KWH-S 264 TOTAL SUBSIDIARY RATE BASE 265 266 TOTAL COMBINED RATE BASE IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - 0 0 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 40 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 267 * * * TABLE 4 - OPERATING REVENUES * * 268 269 OPERATING REVENUES 270 SALES OF ELECTRICIT 271 FIRM ENERGY SALES 272 440-448 RETAIL TAX-REV 1,116,166,332 273 442 CLEAN ENERGY YOUR WAY PPA REVE TAX-REV 173,368,953 274 447 FIRM SALES FOR RESALE TAX-REV 3,474,555 275 447 SYSTEM OPPORTUNITY SALES KWH-O 18,325,578 18,325,578 276 447 FINANCIAL LOSSES KWH-O 9,422,985 9,422,985 277 TOTAL SALES OF ELECTRICIT 1,320,758,403 27,748,563 278 279 OTHER OPERATING REVENUES 280 415 MERCHANDISING REVENUES M-REV 3,793,122 641 281 449 / OATT TARIFF REFUND 282 NETWORK NONE 283 POINT-TO-POINT NONE 284 TOTAL ACCOUNT 449 285 286 287 451 MISCELLANEOUS SERVICE REVENUES MISC-RE 6,150,427 288 289 454 RENTS FROM ELECTRIC PROPERT ` 290 SUBSTATION EQUIPMENT T-353 3,084,356 3,083,841 515 291 TRANSFORMER RENTALS T-PLT 16,623 16,622 1 292 LINE RENTALS P-PTD 293 COGENERATION COGEN-E 1,808,672 1,808,672 294 DARK FIBER PROJECT D-FIBER 295 POLE ATTACHMENTS D364 1,506,578 296 FACILITIES CHARGES OTH-REV 9,859,316 297 OTHER RENTALS PI-H 1,028,271 1,028,271 298 MISCELLANEOUS P-PTD 80,584 27,692 2,610 18,761 1 299 TOTAL ACCOUNT 454 17,384,400 300 301 456 OTHER ELECTRIC REVENUES 302 TRANSMISSION NETWORK SERVICES- T-100 10,628,615 10,628,615 303 TRANSMISSION NETWORK SERVICES D3601 762,362 304 TRANSMISSION POINT-TO-POINT T-100 46,361,643 46,361,643 305 PHOTOVOLTAIC STATION SERVICE D3601 306 ENERGY EFFICIENCY RIDER NONE 307 STAND-BY SERVICE D3601 759,997 308 SIERRA PACIFIC USAGE CHARGE PI-H 49,471 49,471 309 ANTELOPE T-PLT 310 MISCELLANEOUS P-PTD 1,590 547 52 370 0 311 TOTAL ACCOUNT 456 58,563,677 49,471 56,990,258 312 313 TOTAL OTHER OPERATING REVENUES 85,891,627 1,105,981 2,661 1,809,313 60,109,852 518 314 315 TOTAL OPERATING REVENUES 1,406,650,030 1,105,981 2,661 29,557,875 60,109,852 518 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 41 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 267 * * * TABLE 4 - OPERATING REVENUES * * 268 269 OPERATING REVENUES 270 SALES OF ELECTRICIT 271 FIRM ENERGY SALES 272 440-448 RETAIL TAX-REV 273 442 CLEAN ENERGY YOUR WAY PPA REVE TAX-REV 274 447 FIRM SALES FOR RESALE TAX-REV 275 447 SYSTEM OPPORTUNITY SALES KWH-O 276 447 FINANCIAL LOSSES KWH-O 277 TOTAL SALES OF ELECTRICIT 278 279 OTHER OPERATING REVENUES 280 415 MERCHANDISING REVENUES M-REV 281 449 / OATT TARIFF REFUND 282 NETWORK NONE 283 POINT-TO-POINT NONE 284 TOTAL ACCOUNT 449 285 286 287 451 MISCELLANEOUS SERVICE REVENUES MISC-RE 288 289 454 RENTS FROM ELECTRIC PROPERT 290 SUBSTATION EQUIPMENT T-353 291 TRANSFORMER RENTALS T-PLT 292 LINE RENTALS P-PTD 293 COGENERATION COGEN-E 294 DARK FIBER PROJECT D-FIBER 295 POLE ATTACHMENTS D364 296 FACILITIES CHARGES OTH-REV 297 OTHER RENTALS PI-H 298 MISCELLANEOUS P-PTD 299 TOTAL ACCOUNT 454 300 301 456 OTHER ELECTRIC REVENUES 302 TRANSMISSION NETWORK SERVICES- T-100 303 TRANSMISSION NETWORK SERVICES D3601 304 TRANSMISSION POINT-TO-POINT T-100 305 PHOTOVOLTAIC STATION SERVICE D3601 306 ENERGY EFFICIENCY RIDER NONE 307 STAND-BY SERVICE D3601 308 SIERRA PACIFIC USAGE CHARGE PI-H 309 ANTELOPE T-PLT 310 MISCELLANEOUS P-PTD 311 TOTAL ACCOUNT 456 312 313 TOTAL OTHER OPERATING REVENUES 314 315 TOTAL OPERATING REVENUES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * 1,193,973 591,750 74,612 268,576 133,110 74,433 776,753 943,424 467,574 10,502 6,068 283 7,412 3,673 463 1,667 826 462 4,822 146,771 6,845 179,261 88,844 11,202 40,323 19,985 11,175 116,620 146,315 6,824 178,704 88,568 11,167 40,198 19,923 11,141 116,258 120 6 146 72 9 33 16 9 95 293,086 13,669 357,965 177,412 22,369 80,522 39,908 22,316 232,878 299,274 13,957 2,502,919 1,240,482 107,956 350,797 173,860 97,220 1,014,549 299,274 13,957 2,502,919 1,240,482 107,956 350,797 173,860 97,220 1,014,549Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 42 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 267 * * * TABLE 4 - OPERATING REVENUES * * 268 269 OPERATING REVENUES 270 SALES OF ELECTRICIT 271 FIRM ENERGY SALES 272 440-448 RETAIL TAX-REV 273 442 CLEAN ENERGY YOUR WAY PPA REVE TAX-REV 274 447 FIRM SALES FOR RESALE TAX-REV 275 447 SYSTEM OPPORTUNITY SALES KWH-O 276 447 FINANCIAL LOSSES KWH-O 277 TOTAL SALES OF ELECTRICIT 278 279 OTHER OPERATING REVENUES 280 415 MERCHANDISING REVENUES M-REV 281 449 / OATT TARIFF REFUND 282 NETWORK NONE 283 POINT-TO-POINT NONE 284 TOTAL ACCOUNT 449 285 286 287 451 MISCELLANEOUS SERVICE REVENUES MISC-RE 288 289 454 RENTS FROM ELECTRIC PROPERT 290 SUBSTATION EQUIPMENT T-353 291 TRANSFORMER RENTALS T-PLT 292 LINE RENTALS P-PTD 293 COGENERATION COGEN-E 294 DARK FIBER PROJECT D-FIBER 295 POLE ATTACHMENTS D364 296 FACILITIES CHARGES OTH-REV 297 OTHER RENTALS PI-H 298 MISCELLANEOUS P-PTD 299 TOTAL ACCOUNT 454 300 301 456 OTHER ELECTRIC REVENUES 302 TRANSMISSION NETWORK SERVICES- T-100 303 TRANSMISSION NETWORK SERVICES D3601 304 TRANSMISSION POINT-TO-POINT T-100 305 PHOTOVOLTAIC STATION SERVICE D3601 306 ENERGY EFFICIENCY RIDER NONE 307 STAND-BY SERVICE D3601 308 SIERRA PACIFIC USAGE CHARGE PI-H 309 ANTELOPE T-PLT 310 MISCELLANEOUS P-PTD 311 TOTAL ACCOUNT 456 312 313 TOTAL OTHER OPERATING REVENUES 314 315 TOTAL OPERATING REVENUES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * 384,970 76,517 37,923 155,716 14,092 10,058 56,884 28,193 2,390 475 235 967 1,627 87 62 57,799 11,488 5,694 23,379 39,351 2,116 1,510 57,619 11,452 5,676 23,306 39,229 2,109 1,505 47 9 5 19 32 2 1 115,418 22,941 11,370 46,685 78,580 4,225 3,015 502,825 156,826 77,725 203,386 80,239 18,406 13,137 502,825 156,826 77,725 203,386 80,239 18,406 13,137 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 43 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 267 * * * TABLE 4 - OPERATING REVENUES * * 268 269 OPERATING REVENUES 270 SALES OF ELECTRICIT 271 FIRM ENERGY SALES 272 440-448 RETAIL TAX-REV 273 442 CLEAN ENERGY YOUR WAY PPA REVE TAX-REV 274 447 FIRM SALES FOR RESALE TAX-REV 275 447 SYSTEM OPPORTUNITY SALES KWH-O 276 447 FINANCIAL LOSSES KWH-O 277 TOTAL SALES OF ELECTRICIT 278 279 OTHER OPERATING REVENUES 280 415 MERCHANDISING REVENUES M-REV 281 449 / OATT TARIFF REFUND 282 NETWORK NONE 283 POINT-TO-POINT NONE 284 TOTAL ACCOUNT 449 285 286 287 451 MISCELLANEOUS SERVICE REVENUES MISC-RE 288 289 454 RENTS FROM ELECTRIC PROPERT 290 SUBSTATION EQUIPMENT T-353 291 TRANSFORMER RENTALS T-PLT 292 LINE RENTALS P-PTD 293 COGENERATION COGEN-E 294 DARK FIBER PROJECT D-FIBER 295 POLE ATTACHMENTS D364 296 FACILITIES CHARGES OTH-REV 297 OTHER RENTALS PI-H 298 MISCELLANEOUS P-PTD 299 TOTAL ACCOUNT 454 300 301 456 OTHER ELECTRIC REVENUES 302 TRANSMISSION NETWORK SERVICES- T-100 303 TRANSMISSION NETWORK SERVICES D3601 304 TRANSMISSION POINT-TO-POINT T-100 305 PHOTOVOLTAIC STATION SERVICE D3601 306 ENERGY EFFICIENCY RIDER NONE 307 STAND-BY SERVICE D3601 308 SIERRA PACIFIC USAGE CHARGE PI-H 309 ANTELOPE T-PLT 310 MISCELLANEOUS P-PTD 311 TOTAL ACCOUNT 456 312 313 TOTAL OTHER OPERATING REVENUES 314 315 TOTAL OPERATING REVENUES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 44 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 267 * * * TABLE 4 - OPERATING REVENUES * * 268 269 OPERATING REVENUES 270 SALES OF ELECTRICIT 271 FIRM ENERGY SALES 272 440-448 RETAIL TAX-REV 273 442 CLEAN ENERGY YOUR WAY PPA REVE TAX-REV 274 447 FIRM SALES FOR RESALE TAX-REV 275 447 SYSTEM OPPORTUNITY SALES KWH-O 276 447 FINANCIAL LOSSES KWH-O 277 TOTAL SALES OF ELECTRICIT 278 279 OTHER OPERATING REVENUES 280 415 MERCHANDISING REVENUES M-REV 281 449 / OATT TARIFF REFUND 282 NETWORK NONE 283 POINT-TO-POINT NONE 284 TOTAL ACCOUNT 449 285 286 287 451 MISCELLANEOUS SERVICE REVENUES MISC-RE 288 289 454 RENTS FROM ELECTRIC PROPERT 290 SUBSTATION EQUIPMENT T-353 291 TRANSFORMER RENTALS T-PLT 292 LINE RENTALS P-PTD 293 COGENERATION COGEN-E 294 DARK FIBER PROJECT D-FIBER 295 POLE ATTACHMENTS D364 296 FACILITIES CHARGES OTH-REV 297 OTHER RENTALS PI-H 298 MISCELLANEOUS P-PTD 299 TOTAL ACCOUNT 454 300 301 456 OTHER ELECTRIC REVENUES 302 TRANSMISSION NETWORK SERVICES- T-100 303 TRANSMISSION NETWORK SERVICES D3601 304 TRANSMISSION POINT-TO-POINT T-100 305 PHOTOVOLTAIC STATION SERVICE D3601 306 ENERGY EFFICIENCY RIDER NONE 307 STAND-BY SERVICE D3601 308 SIERRA PACIFIC USAGE CHARGE PI-H 309 ANTELOPE T-PLT 310 MISCELLANEOUS P-PTD 311 TOTAL ACCOUNT 456 312 313 TOTAL OTHER OPERATING REVENUES 314 315 TOTAL OPERATING REVENUES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - 1,116,166,332 173,368,953 3,474,555 1,293,009,840 6,150,427 9,859,316 6,150,427 9,859,316 6,150,427 9,859,316 1,293,009,840 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 45 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 316 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * 317 Base-load Peak 318 STEAM POWER GENERATION 319 OPERATION 320 500-OP SUPERVISION & ENGINEERING PI-S (73,374) (73,374) 321 501-OP FUEL KWH-S 62,619,523 62,619,523 322 323 502-OP STEAM EXPENSES 324 LABOR PI-S 1,542,164 1,542,164 325 OTHER KWH-S (1,094,811) (1,094,811) 326 TOTAL ACCOUNT 502 447,353 327 505-OP ELECTRIC EXPENSES 328 LABOR PI-S 600,571 600,571 329 OTHER KWH-S (544,984) (544,984) 330 TOTAL ACCOUNT 505 55,587 331 506-OP MISCELLANEOUS EXPENSES PI-S 407,703 407,703 332 507-OP RENTS PI-S 10,895 10,895 333 TOTAL STEAM OPERATION EXPENSES 63,467,686 334 335 MAINTENANCE 336 510-MT SUPERVISION & ENGINEERING PI-S (240,497) (240,497) 337 511-MT STRUCTURES PI-S 120,601 120,601 338 512-MT BOILER PLANT 339 LABOR PI-S 3,821,200 3,821,200 340 OTHER KWH-S (3,392,111) (3,392,111) 341 TOTAL ACCOUNT 512 429,089 342 513-MT ELECTRIC PLANT 343 LABOR PI-S 1,460,523 1,460,523 344 OTHER KWH-S (1,346,052) (1,346,052) 345 TOTAL ACCOUNT 513 114,471 346 514-MT MISCELLANEOUS STEAM PLANT PI-S 455,440 455,440 347 TOTAL STEAM MAINTENANCE EXPENSES 879,105 348 349 TOTAL STEAM GENERATION EXPENSES 64,346,791 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 46 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 316 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * 317 318 STEAM POWER GENERATION 319 OPERATION 320 500-OP SUPERVISION & ENGINEERING PI-S 321 501-OP FUEL KWH-S 322 323 502-OP STEAM EXPENSES 324 LABOR PI-S 325 OTHER KWH-S 326 TOTAL ACCOUNT 502 327 505-OP ELECTRIC EXPENSES 328 LABOR PI-S 329 OTHER KWH-S 330 TOTAL ACCOUNT 505 331 506-OP MISCELLANEOUS EXPENSES PI-S 332 507-OP RENTS PI-S 333 TOTAL STEAM OPERATION EXPENSES 334 335 MAINTENANCE 336 510-MT SUPERVISION & ENGINEERING PI-S 337 511-MT STRUCTURES PI-S 338 512-MT BOILER PLANT 339 LABOR PI-S 340 OTHER KWH-S 341 TOTAL ACCOUNT 512 342 513-MT ELECTRIC PLANT 343 LABOR PI-S 344 OTHER KWH-S 345 TOTAL ACCOUNT 513 346 514-MT MISCELLANEOUS STEAM PLANT PI-S 347 TOTAL STEAM MAINTENANCE EXPENSES 348 349 TOTAL STEAM GENERATION EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 47 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 316 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * 317 318 STEAM POWER GENERATION 319 OPERATION 320 500-OP SUPERVISION & ENGINEERING PI-S 321 501-OP FUEL KWH-S 322 323 502-OP STEAM EXPENSES 324 LABOR PI-S 325 OTHER KWH-S 326 TOTAL ACCOUNT 502 327 505-OP ELECTRIC EXPENSES 328 LABOR PI-S 329 OTHER KWH-S 330 TOTAL ACCOUNT 505 331 506-OP MISCELLANEOUS EXPENSES PI-S 332 507-OP RENTS PI-S 333 TOTAL STEAM OPERATION EXPENSES 334 335 MAINTENANCE 336 510-MT SUPERVISION & ENGINEERING PI-S 337 511-MT STRUCTURES PI-S 338 512-MT BOILER PLANT 339 LABOR PI-S 340 OTHER KWH-S 341 TOTAL ACCOUNT 512 342 513-MT ELECTRIC PLANT 343 LABOR PI-S 344 OTHER KWH-S 345 TOTAL ACCOUNT 513 346 514-MT MISCELLANEOUS STEAM PLANT PI-S 347 TOTAL STEAM MAINTENANCE EXPENSES 348 349 TOTAL STEAM GENERATION EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 48 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 316 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * 317 318 STEAM POWER GENERATION 319 OPERATION 320 500-OP SUPERVISION & ENGINEERING PI-S 321 501-OP FUEL KWH-S 322 323 502-OP STEAM EXPENSES 324 LABOR PI-S 325 OTHER KWH-S 326 TOTAL ACCOUNT 502 327 505-OP ELECTRIC EXPENSES 328 LABOR PI-S 329 OTHER KWH-S 330 TOTAL ACCOUNT 505 331 506-OP MISCELLANEOUS EXPENSES PI-S 332 507-OP RENTS PI-S 333 TOTAL STEAM OPERATION EXPENSES 334 335 MAINTENANCE 336 510-MT SUPERVISION & ENGINEERING PI-S 337 511-MT STRUCTURES PI-S 338 512-MT BOILER PLANT 339 LABOR PI-S 340 OTHER KWH-S 341 TOTAL ACCOUNT 512 342 513-MT ELECTRIC PLANT 343 LABOR PI-S 344 OTHER KWH-S 345 TOTAL ACCOUNT 513 346 514-MT MISCELLANEOUS STEAM PLANT PI-S 347 TOTAL STEAM MAINTENANCE EXPENSES 348 349 TOTAL STEAM GENERATION EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 49 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 316 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * 317 318 STEAM POWER GENERATION 319 OPERATION 320 500-OP SUPERVISION & ENGINEERING PI-S 321 501-OP FUEL KWH-S 322 323 502-OP STEAM EXPENSES 324 LABOR PI-S 325 OTHER KWH-S 326 TOTAL ACCOUNT 502 327 505-OP ELECTRIC EXPENSES 328 LABOR PI-S 329 OTHER KWH-S 330 TOTAL ACCOUNT 505 331 506-OP MISCELLANEOUS EXPENSES PI-S 332 507-OP RENTS PI-S 333 TOTAL STEAM OPERATION EXPENSES 334 335 MAINTENANCE 336 510-MT SUPERVISION & ENGINEERING PI-S 337 511-MT STRUCTURES PI-S 338 512-MT BOILER PLANT 339 LABOR PI-S 340 OTHER KWH-S 341 TOTAL ACCOUNT 512 342 513-MT ELECTRIC PLANT 343 LABOR PI-S 344 OTHER KWH-S 345 TOTAL ACCOUNT 513 346 514-MT MISCELLANEOUS STEAM PLANT PI-S 347 TOTAL STEAM MAINTENANCE EXPENSES 348 349 TOTAL STEAM GENERATION EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 50 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 350 351 HYDRAULIC POWER GENERATION 352 535-OP SUPERVISION & ENGINEERING L-535 6,210,878 6,210,878 353 536-OP WATER FOR POWER 354 WATER FOR POWER/WCLOUD SEED KWH-H 6,217,277 6,217,277 355 WATER LEASE KWH-H 356 TOTAL ACCOUNT 536 6,217,277 357 358 537-OP HYDRAULIC EXPENSES PI-H 19,366,472 19,366,472 359 538-OP ELECTRIC EXPENSES 360 LABOR PI-H 1,540,414 1,540,414 361 OTHER KWH-H 602,063 602,063 362 TOTAL ACCOUNT 538 2,142,477 363 364 539-OP MISCELLANEOUS EXPENSES PI-H 5,496,716 5,496,716 365 540-OP RENTS PI-H 291,025 291,025 366 TOTAL HYDRAULIC OPERATION EXPENSES 39,724,845 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 51 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 350 351 HYDRAULIC POWER GENERATION 352 535-OP SUPERVISION & ENGINEERING L-535 353 536-OP WATER FOR POWER 354 WATER FOR POWER/WCLOUD SEED KWH-H 355 WATER LEASE KWH-H 356 TOTAL ACCOUNT 536 357 358 537-OP HYDRAULIC EXPENSES PI-H 359 538-OP ELECTRIC EXPENSES 360 LABOR PI-H 361 OTHER KWH-H 362 TOTAL ACCOUNT 538 363 364 539-OP MISCELLANEOUS EXPENSES PI-H 365 540-OP RENTS PI-H 366 TOTAL HYDRAULIC OPERATION EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 52 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 350 351 HYDRAULIC POWER GENERATION 352 535-OP SUPERVISION & ENGINEERING L-535 353 536-OP WATER FOR POWER 354 WATER FOR POWER/WCLOUD SEED KWH-H 355 WATER LEASE KWH-H 356 TOTAL ACCOUNT 536 357 358 537-OP HYDRAULIC EXPENSES PI-H 359 538-OP ELECTRIC EXPENSES 360 LABOR PI-H 361 OTHER KWH-H 362 TOTAL ACCOUNT 538 363 364 539-OP MISCELLANEOUS EXPENSES PI-H 365 540-OP RENTS PI-H 366 TOTAL HYDRAULIC OPERATION EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 53 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 350 351 HYDRAULIC POWER GENERATION 352 535-OP SUPERVISION & ENGINEERING L-535 353 536-OP WATER FOR POWER 354 WATER FOR POWER/WCLOUD SEED KWH-H 355 WATER LEASE KWH-H 356 TOTAL ACCOUNT 536 357 358 537-OP HYDRAULIC EXPENSES PI-H 359 538-OP ELECTRIC EXPENSES 360 LABOR PI-H 361 OTHER KWH-H 362 TOTAL ACCOUNT 538 363 364 539-OP MISCELLANEOUS EXPENSES PI-H 365 540-OP RENTS PI-H 366 TOTAL HYDRAULIC OPERATION EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 54 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 350 351 HYDRAULIC POWER GENERATION 352 535-OP SUPERVISION & ENGINEERING L-535 353 536-OP WATER FOR POWER 354 WATER FOR POWER/WCLOUD SEED KWH-H 355 WATER LEASE KWH-H 356 TOTAL ACCOUNT 536 357 358 537-OP HYDRAULIC EXPENSES PI-H 359 538-OP ELECTRIC EXPENSES 360 LABOR PI-H 361 OTHER KWH-H 362 TOTAL ACCOUNT 538 363 364 539-OP MISCELLANEOUS EXPENSES PI-H 365 540-OP RENTS PI-H 366 TOTAL HYDRAULIC OPERATION EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 55 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 367 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * * 368 369 MAINTENANCE 370 541-MT SUPERVISION & ENGINEERING L-541 120,801 120,801 371 542-MT STRUCTURES PI-H 991,499 991,499 372 543-MT RESERVOIRS, DAMS & WATERWAYS PI-H 487,743 487,743 373 544-MT ELECTRIC PLANT 374 LABOR PI-H 1,833,025 1,833,025 375 OTHER KWH-H 966,545 966,545 376 TOTAL ACCOUNT 544 2,799,570 377 378 545-MT MISCELLANEOUS HYDRAULIC PLANT PI-H 4,134,421 4,134,421 379 380 TOTAL HYDRAULIC MAINTENANCE EXPENSES 8,534,035 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 56 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 367 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * * 368 369 MAINTENANCE 370 541-MT SUPERVISION & ENGINEERING L-541 371 542-MT STRUCTURES PI-H 372 543-MT RESERVOIRS, DAMS & WATERWAYS PI-H 373 544-MT ELECTRIC PLANT 374 LABOR PI-H 375 OTHER KWH-H 376 TOTAL ACCOUNT 544 377 378 545-MT MISCELLANEOUS HYDRAULIC PLANT PI-H 379 380 TOTAL HYDRAULIC MAINTENANCE EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 57 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 367 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * * 368 369 MAINTENANCE 370 541-MT SUPERVISION & ENGINEERING L-541 371 542-MT STRUCTURES PI-H 372 543-MT RESERVOIRS, DAMS & WATERWAYS PI-H 373 544-MT ELECTRIC PLANT 374 LABOR PI-H 375 OTHER KWH-H 376 TOTAL ACCOUNT 544 377 378 545-MT MISCELLANEOUS HYDRAULIC PLANT PI-H 379 380 TOTAL HYDRAULIC MAINTENANCE EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 58 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 367 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * * 368 369 MAINTENANCE 370 541-MT SUPERVISION & ENGINEERING L-541 371 542-MT STRUCTURES PI-H 372 543-MT RESERVOIRS, DAMS & WATERWAYS PI-H 373 544-MT ELECTRIC PLANT 374 LABOR PI-H 375 OTHER KWH-H 376 TOTAL ACCOUNT 544 377 378 545-MT MISCELLANEOUS HYDRAULIC PLANT PI-H 379 380 TOTAL HYDRAULIC MAINTENANCE EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 59 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 367 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * * 368 369 MAINTENANCE 370 541-MT SUPERVISION & ENGINEERING L-541 371 542-MT STRUCTURES PI-H 372 543-MT RESERVOIRS, DAMS & WATERWAYS PI-H 373 544-MT ELECTRIC PLANT 374 LABOR PI-H 375 OTHER KWH-H 376 TOTAL ACCOUNT 544 377 378 545-MT MISCELLANEOUS HYDRAULIC PLANT PI-H 379 380 TOTAL HYDRAULIC MAINTENANCE EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 60 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 381 382 TOTAL HYDRAULIC GENERATION EXPENSES 48,258,881 383 384 OTHER POWER GENERATION 385 OPERATION 386 546-OP SUPERVISION & ENGINEERING L-546 685,537 480,982 204,555 387 547-OP FUEL 388 DIESEL FUEL KWH-O 10,034 10,034 389 OTHER KWH-O 114,351,541 114,351,541 390 TOTAL ACCOUNT 547 114,361,575 391 392 548-OP GENERATING EXPENSES 393 LABOR PI-OS 3,293,050 2,310,449 982,601 394 OTHER KWH-O 1,921,928 1,921,928 395 TOTAL ACCOUNT 548 5,214,978 396 397 549-OP MISCELLANEOUS EXPENSES PI-OS 72,854 51,116 21,739 398 550-OP RENTS PI-OS 399 400 TOTAL OTHER POWER OPER EXPENSES 120,334,945 401 402 MAINTENANCE 403 551-MT SUPERVISION & ENGINEERING L-551 404 552-MT STRUCTURES PI-OS 160,358 112,509 47,849 405 553-MT GENERATING & ELECTRIC PLANT 406 LABOR PI-OS 58,030 40,715 17,315 407 OTHER KWH-O 838,743 838,743 408 TOTAL ACCOUNT 553 896,774 409 410 554-MT MISCELLANEOUS EXPENSES PI-OS 3,249,153 2,279,650 969,503 411 TOTAL OTHER POWER MAINT EXPENSES 4,306,284 412 413 TOTAL OTHER POWER GEN EXPENSES 124,641,229 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 61 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 381 382 TOTAL HYDRAULIC GENERATION EXPENSES 383 384 OTHER POWER GENERATION 385 OPERATION 386 546-OP SUPERVISION & ENGINEERING L-546 387 547-OP FUEL 388 DIESEL FUEL KWH-O 389 OTHER KWH-O 390 TOTAL ACCOUNT 547 391 392 548-OP GENERATING EXPENSES 393 LABOR PI-OS 394 OTHER KWH-O 395 TOTAL ACCOUNT 548 396 397 549-OP MISCELLANEOUS EXPENSES PI-OS 398 550-OP RENTS PI-OS 399 400 TOTAL OTHER POWER OPER EXPENSES 401 402 MAINTENANCE 403 551-MT SUPERVISION & ENGINEERING L-551 404 552-MT STRUCTURES PI-OS 405 553-MT GENERATING & ELECTRIC PLANT 406 LABOR PI-OS 407 OTHER KWH-O 408 TOTAL ACCOUNT 553 409 410 554-MT MISCELLANEOUS EXPENSES PI-OS 411 TOTAL OTHER POWER MAINT EXPENSES 412 413 TOTAL OTHER POWER GEN EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 62 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 381 382 TOTAL HYDRAULIC GENERATION EXPENSES 383 384 OTHER POWER GENERATION 385 OPERATION 386 546-OP SUPERVISION & ENGINEERING L-546 387 547-OP FUEL 388 DIESEL FUEL KWH-O 389 OTHER KWH-O 390 TOTAL ACCOUNT 547 391 392 548-OP GENERATING EXPENSES 393 LABOR PI-OS 394 OTHER KWH-O 395 TOTAL ACCOUNT 548 396 397 549-OP MISCELLANEOUS EXPENSES PI-OS 398 550-OP RENTS PI-OS 399 400 TOTAL OTHER POWER OPER EXPENSES 401 402 MAINTENANCE 403 551-MT SUPERVISION & ENGINEERING L-551 404 552-MT STRUCTURES PI-OS 405 553-MT GENERATING & ELECTRIC PLANT 406 LABOR PI-OS 407 OTHER KWH-O 408 TOTAL ACCOUNT 553 409 410 554-MT MISCELLANEOUS EXPENSES PI-OS 411 TOTAL OTHER POWER MAINT EXPENSES 412 413 TOTAL OTHER POWER GEN EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 63 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 381 382 TOTAL HYDRAULIC GENERATION EXPENSES 383 384 OTHER POWER GENERATION 385 OPERATION 386 546-OP SUPERVISION & ENGINEERING L-546 387 547-OP FUEL 388 DIESEL FUEL KWH-O 389 OTHER KWH-O 390 TOTAL ACCOUNT 547 391 392 548-OP GENERATING EXPENSES 393 LABOR PI-OS 394 OTHER KWH-O 395 TOTAL ACCOUNT 548 396 397 549-OP MISCELLANEOUS EXPENSES PI-OS 398 550-OP RENTS PI-OS 399 400 TOTAL OTHER POWER OPER EXPENSES 401 402 MAINTENANCE 403 551-MT SUPERVISION & ENGINEERING L-551 404 552-MT STRUCTURES PI-OS 405 553-MT GENERATING & ELECTRIC PLANT 406 LABOR PI-OS 407 OTHER KWH-O 408 TOTAL ACCOUNT 553 409 410 554-MT MISCELLANEOUS EXPENSES PI-OS 411 TOTAL OTHER POWER MAINT EXPENSES 412 413 TOTAL OTHER POWER GEN EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 64 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 381 382 TOTAL HYDRAULIC GENERATION EXPENSES 383 384 OTHER POWER GENERATION 385 OPERATION 386 546-OP SUPERVISION & ENGINEERING L-546 387 547-OP FUEL 388 DIESEL FUEL KWH-O 389 OTHER KWH-O 390 TOTAL ACCOUNT 547 391 392 548-OP GENERATING EXPENSES 393 LABOR PI-OS 394 OTHER KWH-O 395 TOTAL ACCOUNT 548 396 397 549-OP MISCELLANEOUS EXPENSES PI-OS 398 550-OP RENTS PI-OS 399 400 TOTAL OTHER POWER OPER EXPENSES 401 402 MAINTENANCE 403 551-MT SUPERVISION & ENGINEERING L-551 404 552-MT STRUCTURES PI-OS 405 553-MT GENERATING & ELECTRIC PLANT 406 LABOR PI-OS 407 OTHER KWH-O 408 TOTAL ACCOUNT 553 409 410 554-MT MISCELLANEOUS EXPENSES PI-OS 411 TOTAL OTHER POWER MAINT EXPENSES 412 413 TOTAL OTHER POWER GEN EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 65 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 414 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * 415 416 OTHER POWER SUPPLY EXPENSE 417 555.0 PURCHASED POWER 418 POWER EXPENSE PP-KWH 95,057,493 95,057,493 419 CLEAN ENERGY YOUR WAY PPA COS PP-KWH 420 TRANSMISSION LOSSES PP-KWH 421 DEMAND RESPONSE INCENTIVE PI-O 10,240,003 10,240,003 422 TOTAL 555.0/PURCHASED POWER 105,297,496 423 424 555.1 COGENERATION & SMALL POWER PRO PP-KWH 204,946,028 204,946,028 425 TOTAL COGEN & SMALL POWER PROD 204,946,028 426 427 TOTAL ACCOUNT 555 310,243,524 428 429 556 LOAD CONTROL & DISPATCHING EXPE PP-KW 430 557 PCA/ EPC ACCOUNTS NONE 431 557 OTHER PI-SHO 6,743,211 6,162,485 580,727 432 433 TOTAL OTHER POWER SUPPLY EXPENSES 316,986,736 434 435 TOTAL PRODUCTION EXPENSES 554,233,636 436 437 438 TRANSMISSION EXPENSES 439 440 OPERATION 441 560-OP SUPERVISION & ENGINEERING L-560 3,446,215 3,445,898 318 442 561-OP LOAD DISPATCHING T-PLT 5,771,817 5,771,479 339 443 562-OP STATION EXPENSES T-353 2,994,513 2,994,013 500 444 563-OP OVERHEAD LINE EXPENSES T-354-356 1,156,414 1,156,412 2 445 565-OP TRANSMISSION OF ELECTRICITY BY OT KWH-T 9,808,355 9,808,355 446 566-OP MISCELLANEOUS EXPENSES T-PLT 7 7 0 447 567-OP RENTS T-354-359 4,657,012 4,657,005 8 448 449 TOTAL TRANSMISSION OPERATION 27,834,335 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 66 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 414 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * 415 416 OTHER POWER SUPPLY EXPENSE 417 555.0 PURCHASED POWER 418 POWER EXPENSE PP-KWH 419 CLEAN ENERGY YOUR WAY PPA COS PP-KWH 420 TRANSMISSION LOSSES PP-KWH 421 DEMAND RESPONSE INCENTIVE PI-O 422 TOTAL 555.0/PURCHASED POWER 423 424 555.1 COGENERATION & SMALL POWER PRO PP-KWH 425 TOTAL COGEN & SMALL POWER PROD 426 427 TOTAL ACCOUNT 555 428 429 556 LOAD CONTROL & DISPATCHING EXPE PP-KW 430 557 PCA/ EPC ACCOUNTS NONE 431 557 OTHER PI-SHO 432 433 TOTAL OTHER POWER SUPPLY EXPENSES 434 435 TOTAL PRODUCTION EXPENSES 436 437 438 TRANSMISSION EXPENSES 439 440 OPERATION 441 560-OP SUPERVISION & ENGINEERING L-560 442 561-OP LOAD DISPATCHING T-PLT 443 562-OP STATION EXPENSES T-353 444 563-OP OVERHEAD LINE EXPENSES T-354-356 445 565-OP TRANSMISSION OF ELECTRICITY BY OT KWH-T 446 566-OP MISCELLANEOUS EXPENSES T-PLT 447 567-OP RENTS T-354-359 448 449 TOTAL TRANSMISSION OPERATION IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 67 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 414 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * 415 416 OTHER POWER SUPPLY EXPENSE 417 555.0 PURCHASED POWER 418 POWER EXPENSE PP-KWH 419 CLEAN ENERGY YOUR WAY PPA COS PP-KWH 420 TRANSMISSION LOSSES PP-KWH 421 DEMAND RESPONSE INCENTIVE PI-O 422 TOTAL 555.0/PURCHASED POWER 423 424 555.1 COGENERATION & SMALL POWER PRO PP-KWH 425 TOTAL COGEN & SMALL POWER PROD 426 427 TOTAL ACCOUNT 555 428 429 556 LOAD CONTROL & DISPATCHING EXPE PP-KW 430 557 PCA/ EPC ACCOUNTS NONE 431 557 OTHER PI-SHO 432 433 TOTAL OTHER POWER SUPPLY EXPENSES 434 435 TOTAL PRODUCTION EXPENSES 436 437 438 TRANSMISSION EXPENSES 439 440 OPERATION 441 560-OP SUPERVISION & ENGINEERING L-560 442 561-OP LOAD DISPATCHING T-PLT 443 562-OP STATION EXPENSES T-353 444 563-OP OVERHEAD LINE EXPENSES T-354-356 445 565-OP TRANSMISSION OF ELECTRICITY BY OT KWH-T 446 566-OP MISCELLANEOUS EXPENSES T-PLT 447 567-OP RENTS T-354-359 448 449 TOTAL TRANSMISSION OPERATION IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 68 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 414 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * 415 416 OTHER POWER SUPPLY EXPENSE 417 555.0 PURCHASED POWER 418 POWER EXPENSE PP-KWH 419 CLEAN ENERGY YOUR WAY PPA COS PP-KWH 420 TRANSMISSION LOSSES PP-KWH 421 DEMAND RESPONSE INCENTIVE PI-O 422 TOTAL 555.0/PURCHASED POWER 423 424 555.1 COGENERATION & SMALL POWER PRO PP-KWH 425 TOTAL COGEN & SMALL POWER PROD 426 427 TOTAL ACCOUNT 555 428 429 556 LOAD CONTROL & DISPATCHING EXPE PP-KW 430 557 PCA/ EPC ACCOUNTS NONE 431 557 OTHER PI-SHO 432 433 TOTAL OTHER POWER SUPPLY EXPENSES 434 435 TOTAL PRODUCTION EXPENSES 436 437 438 TRANSMISSION EXPENSES 439 440 OPERATION 441 560-OP SUPERVISION & ENGINEERING L-560 442 561-OP LOAD DISPATCHING T-PLT 443 562-OP STATION EXPENSES T-353 444 563-OP OVERHEAD LINE EXPENSES T-354-356 445 565-OP TRANSMISSION OF ELECTRICITY BY OT KWH-T 446 566-OP MISCELLANEOUS EXPENSES T-PLT 447 567-OP RENTS T-354-359 448 449 TOTAL TRANSMISSION OPERATION IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 69 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 414 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * 415 416 OTHER POWER SUPPLY EXPENSE 417 555.0 PURCHASED POWER 418 POWER EXPENSE PP-KWH 419 CLEAN ENERGY YOUR WAY PPA COS PP-KWH 420 TRANSMISSION LOSSES PP-KWH 421 DEMAND RESPONSE INCENTIVE PI-O 422 TOTAL 555.0/PURCHASED POWER 423 424 555.1 COGENERATION & SMALL POWER PRO PP-KWH 425 TOTAL COGEN & SMALL POWER PROD 426 427 TOTAL ACCOUNT 555 428 429 556 LOAD CONTROL & DISPATCHING EXPE PP-KW 430 557 PCA/ EPC ACCOUNTS NONE 431 557 OTHER PI-SHO 432 433 TOTAL OTHER POWER SUPPLY EXPENSES 434 435 TOTAL PRODUCTION EXPENSES 436 437 438 TRANSMISSION EXPENSES 439 440 OPERATION 441 560-OP SUPERVISION & ENGINEERING L-560 442 561-OP LOAD DISPATCHING T-PLT 443 562-OP STATION EXPENSES T-353 444 563-OP OVERHEAD LINE EXPENSES T-354-356 445 565-OP TRANSMISSION OF ELECTRICITY BY OT KWH-T 446 566-OP MISCELLANEOUS EXPENSES T-PLT 447 567-OP RENTS T-354-359 448 449 TOTAL TRANSMISSION OPERATION IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 70 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 450 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * 451 MAINTENANCE 452 568-MT SUPERVISION & ENGINEERING L-568 212,937 212,919 18 453 569-MT STRUCTURES T-352 2,060,282 2,060,282 454 570-MT STATION EQUIPMENT T-353 2,927,971 2,927,482 489 455 571-MT OVERHEAD LINES T-354-356 3,119,250 3,119,245 5 456 573-MT MISCELLANEOUS PLANT T-PLT 5,545 5,544 0 457 458 TOTAL TRANSMISSION MAINTENANCE 8,325,986 459 460 TOTAL TRANSMISSION EXPENSES 36,160,321 461 462 REGIONAL MARKET EXPENSES 463 OPERATION 464 575 / OPER TRANS MKT ADMIN - EIM T-100 658,814 658,814 465 466 TOTAL REGIONAL MARKET EXPENSES 658,814 467 468 DISTRIBUTION EXPENSES Base-load Peak 469 470 OPERATION 471 580-OP SUPERVISION & ENGINEERING L-580 6,125,235 472 581-OP LOAD DISPATCHING D3601 5,719,617 473 582-OP STATION EXPENSES D362 1,941,646 474 583-OP OVERHEAD LINE EXPENSES D-364-365 5,775,361 475 584-OP UNDERGROUND LINE EXPENSES D-366-367 4,896,899 476 585-OP STREET LIGHTING & SIGNAL SYSTEMS CUSTINS 46,840 477 586-OP METER EXPENSES METER 6,300,993 478 587-OP CUSTOMER INSTALLATIONS EXPENSE CUSTINS 1,145,133 479 588-OP MISCELLANEOUS EXPENSES D3601 4,946,817 480 589-OP RENTS D3601 706,360 481 TOTAL DISTRIBUTION OPERATION 37,604,900 482 483 MAINTENANCE 484 590-MT SUPERVISION & ENGINEERING L-590 12,909 485 591-MT STRUCTURES D361 486 592-MT STATION EQUIPMENT D362 4,398,336 487 593-MT OVERHEAD LINES D-364-365 33,104,169 488 594-MT UNDERGROUND LINES D-366-367 824,825 489 595-MT LINE TRANSFORMERS D368 92,933 490 596-MT STREET LIGHTING & SIGNAL SYSTEMS STLIGHT 222,570 491 597-MT METERS METER 949,631 492 598-MT MISCELLANEOUS PLANT CUSTINS 132,362 493 TOTAL DISTRIBUTION MAINTENANCE 39,737,736 494 495 TOTAL DISTRIBUTION EXPENSES 77,342,636 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 71 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 450 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * 451 MAINTENANCE 452 568-MT SUPERVISION & ENGINEERING L-568 453 569-MT STRUCTURES T-352 454 570-MT STATION EQUIPMENT T-353 455 571-MT OVERHEAD LINES T-354-356 456 573-MT MISCELLANEOUS PLANT T-PLT 457 458 TOTAL TRANSMISSION MAINTENANCE 459 460 TOTAL TRANSMISSION EXPENSES 461 462 REGIONAL MARKET EXPENSES 463 OPERATION 464 575 / OPER TRANS MKT ADMIN - EIM T-100 465 466 TOTAL REGIONAL MARKET EXPENSES 467 468 DISTRIBUTION EXPENSES 469 470 OPERATION 471 580-OP SUPERVISION & ENGINEERING L-580 472 581-OP LOAD DISPATCHING D3601 473 582-OP STATION EXPENSES D362 474 583-OP OVERHEAD LINE EXPENSES D-364-365 475 584-OP UNDERGROUND LINE EXPENSES D-366-367 476 585-OP STREET LIGHTING & SIGNAL SYSTEMS CUSTINS 477 586-OP METER EXPENSES METER 478 587-OP CUSTOMER INSTALLATIONS EXPENSE CUSTINS 479 588-OP MISCELLANEOUS EXPENSES D3601 480 589-OP RENTS D3601 481 TOTAL DISTRIBUTION OPERATION 482 483 MAINTENANCE 484 590-MT SUPERVISION & ENGINEERING L-590 485 591-MT STRUCTURES D361 486 592-MT STATION EQUIPMENT D362 487 593-MT OVERHEAD LINES D-364-365 488 594-MT UNDERGROUND LINES D-366-367 489 595-MT LINE TRANSFORMERS D368 490 596-MT STREET LIGHTING & SIGNAL SYSTEMS STLIGHT 491 597-MT METERS METER 492 598-MT MISCELLANEOUS PLANT CUSTINS 493 TOTAL DISTRIBUTION MAINTENANCE 494 495 TOTAL DISTRIBUTION EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * 785,039 36,050 1,592,180 789,107 80,250 127,685 63,282 35,386 369,281 1,101,147 51,354 1,344,902 666,552 84,044 302,526 149,936 83,842 874,942 1,858,243 83,403 3,567,212 1,767,960 44,608 2,884,677 1,429,686 360,208 952,366 44,415 1,163,187 576,492 72,688 261,651 129,678 72,514 756,725 135,989 6,342 166,092 82,318 10,379 37,361 18,517 10,354 108,053 3,743 168 4,774 2,366 91 12 6 3 35 4,209,407 188,929 20,447,135 10,133,887 255,692 485,890 240,814 60,673 15,239 7,553 4,223 44,074 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 72 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 450 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * 451 MAINTENANCE 452 568-MT SUPERVISION & ENGINEERING L-568 453 569-MT STRUCTURES T-352 454 570-MT STATION EQUIPMENT T-353 455 571-MT OVERHEAD LINES T-354-356 456 573-MT MISCELLANEOUS PLANT T-PLT 457 458 TOTAL TRANSMISSION MAINTENANCE 459 460 TOTAL TRANSMISSION EXPENSES 461 462 REGIONAL MARKET EXPENSES 463 OPERATION 464 575 / OPER TRANS MKT ADMIN - EIM T-100 465 466 TOTAL REGIONAL MARKET EXPENSES 467 468 DISTRIBUTION EXPENSES 469 470 OPERATION 471 580-OP SUPERVISION & ENGINEERING L-580 472 581-OP LOAD DISPATCHING D3601 473 582-OP STATION EXPENSES D362 474 583-OP OVERHEAD LINE EXPENSES D-364-365 475 584-OP UNDERGROUND LINE EXPENSES D-366-367 476 585-OP STREET LIGHTING & SIGNAL SYSTEMS CUSTINS 477 586-OP METER EXPENSES METER 478 587-OP CUSTOMER INSTALLATIONS EXPENSE CUSTINS 479 588-OP MISCELLANEOUS EXPENSES D3601 480 589-OP RENTS D3601 481 TOTAL DISTRIBUTION OPERATION 482 483 MAINTENANCE 484 590-MT SUPERVISION & ENGINEERING L-590 485 591-MT STRUCTURES D361 486 592-MT STATION EQUIPMENT D362 487 593-MT OVERHEAD LINES D-364-365 488 594-MT UNDERGROUND LINES D-366-367 489 595-MT LINE TRANSFORMERS D368 490 596-MT STREET LIGHTING & SIGNAL SYSTEMS STLIGHT 491 597-MT METERS METER 492 598-MT MISCELLANEOUS PLANT CUSTINS 493 TOTAL DISTRIBUTION MAINTENANCE 494 495 TOTAL DISTRIBUTION EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * 183,021 105,910 52,490 74,030 1,568,096 13,683 249,747 433,634 86,189 42,717 175,399 295,232 15,873 11,329 264,494 131,087 148,653 73,674 46,840 6,300,993 1,145,133 375,044 74,544 36,945 151,700 255,342 13,729 9,798 53,553 10,644 5,275 21,661 36,460 1,960 1,399 17 348 172 4 991 179 0 1,516,069 751,385 25,039 12,410 21,844 222,570 949,631 132,362 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 73 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 450 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * 451 MAINTENANCE 452 568-MT SUPERVISION & ENGINEERING L-568 453 569-MT STRUCTURES T-352 454 570-MT STATION EQUIPMENT T-353 455 571-MT OVERHEAD LINES T-354-356 456 573-MT MISCELLANEOUS PLANT T-PLT 457 458 TOTAL TRANSMISSION MAINTENANCE 459 460 TOTAL TRANSMISSION EXPENSES 461 462 REGIONAL MARKET EXPENSES 463 OPERATION 464 575 / OPER TRANS MKT ADMIN - EIM T-100 465 466 TOTAL REGIONAL MARKET EXPENSES 467 468 DISTRIBUTION EXPENSES 469 470 OPERATION 471 580-OP SUPERVISION & ENGINEERING L-580 472 581-OP LOAD DISPATCHING D3601 473 582-OP STATION EXPENSES D362 474 583-OP OVERHEAD LINE EXPENSES D-364-365 475 584-OP UNDERGROUND LINE EXPENSES D-366-367 476 585-OP STREET LIGHTING & SIGNAL SYSTEMS CUSTINS 477 586-OP METER EXPENSES METER 478 587-OP CUSTOMER INSTALLATIONS EXPENSE CUSTINS 479 588-OP MISCELLANEOUS EXPENSES D3601 480 589-OP RENTS D3601 481 TOTAL DISTRIBUTION OPERATION 482 483 MAINTENANCE 484 590-MT SUPERVISION & ENGINEERING L-590 485 591-MT STRUCTURES D361 486 592-MT STATION EQUIPMENT D362 487 593-MT OVERHEAD LINES D-364-365 488 594-MT UNDERGROUND LINES D-366-367 489 595-MT LINE TRANSFORMERS D368 490 596-MT STREET LIGHTING & SIGNAL SYSTEMS STLIGHT 491 597-MT METERS METER 492 598-MT MISCELLANEOUS PLANT CUSTINS 493 TOTAL DISTRIBUTION MAINTENANCE 494 495 TOTAL DISTRIBUTION EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 74 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 450 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * 451 MAINTENANCE 452 568-MT SUPERVISION & ENGINEERING L-568 453 569-MT STRUCTURES T-352 454 570-MT STATION EQUIPMENT T-353 455 571-MT OVERHEAD LINES T-354-356 456 573-MT MISCELLANEOUS PLANT T-PLT 457 458 TOTAL TRANSMISSION MAINTENANCE 459 460 TOTAL TRANSMISSION EXPENSES 461 462 REGIONAL MARKET EXPENSES 463 OPERATION 464 575 / OPER TRANS MKT ADMIN - EIM T-100 465 466 TOTAL REGIONAL MARKET EXPENSES 467 468 DISTRIBUTION EXPENSES 469 470 OPERATION 471 580-OP SUPERVISION & ENGINEERING L-580 472 581-OP LOAD DISPATCHING D3601 473 582-OP STATION EXPENSES D362 474 583-OP OVERHEAD LINE EXPENSES D-364-365 475 584-OP UNDERGROUND LINE EXPENSES D-366-367 476 585-OP STREET LIGHTING & SIGNAL SYSTEMS CUSTINS 477 586-OP METER EXPENSES METER 478 587-OP CUSTOMER INSTALLATIONS EXPENSE CUSTINS 479 588-OP MISCELLANEOUS EXPENSES D3601 480 589-OP RENTS D3601 481 TOTAL DISTRIBUTION OPERATION 482 483 MAINTENANCE 484 590-MT SUPERVISION & ENGINEERING L-590 485 591-MT STRUCTURES D361 486 592-MT STATION EQUIPMENT D362 487 593-MT OVERHEAD LINES D-364-365 488 594-MT UNDERGROUND LINES D-366-367 489 595-MT LINE TRANSFORMERS D368 490 596-MT STREET LIGHTING & SIGNAL SYSTEMS STLIGHT 491 597-MT METERS METER 492 598-MT MISCELLANEOUS PLANT CUSTINS 493 TOTAL DISTRIBUTION MAINTENANCE 494 495 TOTAL DISTRIBUTION EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 75 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 496 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * * 497 498 CUSTOMER ACCOUNTING EXPENSES 499 901-OP SUPERVISION L-901 917,533 500 902-OP METER READING M-READ 1,768,247 501 903-OP CUSTOMER RECORDS & COLLECTIONS C-RECOR 16,063,116 502 904-OP UNCOLLECTIBLE ACCOUNTS UAR 5,389,398 503 905-OP MISC CUSTOMER ACCOUNTS EXPENSE D-902-904 (2,881) 504 TOTAL CUSTOMER ACCOUNTING EXPENSES 24,135,413 505 CUSTOMER SERVICES & INFORMATION EXPENSES 506 907-OP SUPERVISION L-907 1,103,115 162,234 507 908-OP CUSTOMER ASSISTANCE 508 ENERGY EFFICIENCY PROGRAMS PI-H 1,673,332 1,673,332 509 OTHER C-ASSIST 9,704,522 510 TOTAL ACCOUNT 908 11,377,854 511 909-OP INFORMATION & INSTRUCTIONAL C-ASSIST 285,588 512 910-OP MISCELLANEOUS EXPENSES D-908-909 775,684 111,286 513 912 DEMO AND SELLING EXPENSES NONE 514 TOTAL CUST SERV & INFO EXPENSES 13,542,241 515 516 DMINISTRATIVE & GENERAL EXPENSES 517 518 920-OP DMINISTRATIVE & GENERAL SALARIE LABOR 85,713,649 36,897,029 1,488,199 10,018,677 893 519 921-OP OFFICE SUPPLIES LABOR 14,512,913 6,247,352 251,980 1,696,348 151 520 922-OP DMIN & GENERAL EXP TRANSFERRED LABOR (38,641,443) (16,633,925) (670,910) (4,516,622) (403) 521 923-OP OUTSIDE SERVICES LABOR 8,352,051 3,595,295 145,012 976,233 87 522 523 924-OP PROPERTY INSURANCE 524 PRODUCTION - STEAM PI-S 395,764 395,764 525 ALL RISK & MISCELLANEOUS P110P-L2 4,725,542 1,483,795 159,944 1,149,860 67 526 TOTAL ACCOUNT 924 5,121,307 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 76 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 496 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * * 497 498 CUSTOMER ACCOUNTING EXPENSES 499 901-OP SUPERVISION L-901 500 902-OP METER READING M-READ 501 903-OP CUSTOMER RECORDS & COLLECTIONS C-RECOR 502 904-OP UNCOLLECTIBLE ACCOUNTS UAR 503 905-OP MISC CUSTOMER ACCOUNTS EXPENSE D-902-904 504 TOTAL CUSTOMER ACCOUNTING EXPENSES 505 CUSTOMER SERVICES & INFORMATION EXPENSES 506 907-OP SUPERVISION L-907 507 908-OP CUSTOMER ASSISTANCE 508 ENERGY EFFICIENCY PROGRAMS PI-H 509 OTHER C-ASSIST 510 TOTAL ACCOUNT 908 511 909-OP INFORMATION & INSTRUCTIONAL C-ASSIST 512 910-OP MISCELLANEOUS EXPENSES D-908-909 513 912 DEMO AND SELLING EXPENSES NONE 514 TOTAL CUST SERV & INFO EXPENSES 515 516 DMINISTRATIVE & GENERAL EXPENSES 517 518 920-OP DMINISTRATIVE & GENERAL SALARIE LABOR 519 921-OP OFFICE SUPPLIES LABOR 520 922-OP DMIN & GENERAL EXP TRANSFERRED LABOR 521 923-OP OUTSIDE SERVICES LABOR 522 523 924-OP PROPERTY INSURANCE 524 PRODUCTION - STEAM PI-S 525 ALL RISK & MISCELLANEOUS P110P-L2 526 TOTAL ACCOUNT 924 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * 4,235,199 192,338 7,017,805 3,478,122 270,162 355,876 176,377 98,627 1,029,238 717,098 32,566 1,188,245 588,911 45,743 60,256 29,864 16,699 174,269 (1,909,313) (86,710) (3,163,768) (1,568,008) (121,794) (160,436) (79,514) (44,463) (464,001) 412,683 18,742 683,824 338,913 26,325 34,677 17,186 9,610 100,290 371,927 17,345 454,258 225,137 28,387 102,182 50,643 28,319 295,523 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 77 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 496 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * * 497 498 CUSTOMER ACCOUNTING EXPENSES 499 901-OP SUPERVISION L-901 500 902-OP METER READING M-READ 501 903-OP CUSTOMER RECORDS & COLLECTIONS C-RECOR 502 904-OP UNCOLLECTIBLE ACCOUNTS UAR 503 905-OP MISC CUSTOMER ACCOUNTS EXPENSE D-902-904 504 TOTAL CUSTOMER ACCOUNTING EXPENSES 505 CUSTOMER SERVICES & INFORMATION EXPENSES 506 907-OP SUPERVISION L-907 507 908-OP CUSTOMER ASSISTANCE 508 ENERGY EFFICIENCY PROGRAMS PI-H 509 OTHER C-ASSIST 510 TOTAL ACCOUNT 908 511 909-OP INFORMATION & INSTRUCTIONAL C-ASSIST 512 910-OP MISCELLANEOUS EXPENSES D-908-909 513 912 DEMO AND SELLING EXPENSES NONE 514 TOTAL CUST SERV & INFO EXPENSES 515 516 DMINISTRATIVE & GENERAL EXPENSES 517 518 920-OP DMINISTRATIVE & GENERAL SALARIE LABOR 519 921-OP OFFICE SUPPLIES LABOR 520 922-OP DMIN & GENERAL EXP TRANSFERRED LABOR 521 923-OP OUTSIDE SERVICES LABOR 522 523 924-OP PROPERTY INSURANCE 524 PRODUCTION - STEAM PI-S 525 ALL RISK & MISCELLANEOUS P110P-L2 526 TOTAL ACCOUNT 924 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * 510,105 483,631 239,694 204,389 4,841,196 137,209 683,047 86,370 81,888 40,585 34,607 819,704 23,232 115,653 (229,965) (218,031) (108,059) (92,143) (2,182,509) (61,857) (307,932) 49,705 47,126 23,356 19,916 471,733 13,370 66,557 146,465 29,112 14,428 59,243 99,718 5,361 3,827 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 78 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 496 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * * 497 498 CUSTOMER ACCOUNTING EXPENSES 499 901-OP SUPERVISION L-901 500 902-OP METER READING M-READ 501 903-OP CUSTOMER RECORDS & COLLECTIONS C-RECOR 502 904-OP UNCOLLECTIBLE ACCOUNTS UAR 503 905-OP MISC CUSTOMER ACCOUNTS EXPENSE D-902-904 504 TOTAL CUSTOMER ACCOUNTING EXPENSES 505 CUSTOMER SERVICES & INFORMATION EXPENSES 506 907-OP SUPERVISION L-907 507 908-OP CUSTOMER ASSISTANCE 508 ENERGY EFFICIENCY PROGRAMS PI-H 509 OTHER C-ASSIST 510 TOTAL ACCOUNT 908 511 909-OP INFORMATION & INSTRUCTIONAL C-ASSIST 512 910-OP MISCELLANEOUS EXPENSES D-908-909 513 912 DEMO AND SELLING EXPENSES NONE 514 TOTAL CUST SERV & INFO EXPENSES 515 516 DMINISTRATIVE & GENERAL EXPENSES 517 518 920-OP DMINISTRATIVE & GENERAL SALARIE LABOR 519 921-OP OFFICE SUPPLIES LABOR 520 922-OP DMIN & GENERAL EXP TRANSFERRED LABOR 521 923-OP OUTSIDE SERVICES LABOR 522 523 924-OP PROPERTY INSURANCE 524 PRODUCTION - STEAM PI-S 525 ALL RISK & MISCELLANEOUS P110P-L2 526 TOTAL ACCOUNT 924 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * 95,868 821,665 1,768,247 16,063,116 5,389,398 (219) (1,993) (669) 940,881 9,704,522 285,588 664,398 972,917 8,338,669 4,044,248 164,733 1,411,892 684,766 (438,610) (3,759,240) (1,823,229) 94,802 812,531 394,077 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 79 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 496 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * * 497 498 CUSTOMER ACCOUNTING EXPENSES 499 901-OP SUPERVISION L-901 500 902-OP METER READING M-READ 501 903-OP CUSTOMER RECORDS & COLLECTIONS C-RECOR 502 904-OP UNCOLLECTIBLE ACCOUNTS UAR 503 905-OP MISC CUSTOMER ACCOUNTS EXPENSE D-902-904 504 TOTAL CUSTOMER ACCOUNTING EXPENSES 505 CUSTOMER SERVICES & INFORMATION EXPENSES 506 907-OP SUPERVISION L-907 507 908-OP CUSTOMER ASSISTANCE 508 ENERGY EFFICIENCY PROGRAMS PI-H 509 OTHER C-ASSIST 510 TOTAL ACCOUNT 908 511 909-OP INFORMATION & INSTRUCTIONAL C-ASSIST 512 910-OP MISCELLANEOUS EXPENSES D-908-909 513 912 DEMO AND SELLING EXPENSES NONE 514 TOTAL CUST SERV & INFO EXPENSES 515 516 DMINISTRATIVE & GENERAL EXPENSES 517 518 920-OP DMINISTRATIVE & GENERAL SALARIE LABOR 519 921-OP OFFICE SUPPLIES LABOR 520 922-OP DMIN & GENERAL EXP TRANSFERRED LABOR 521 923-OP OUTSIDE SERVICES LABOR 522 523 924-OP PROPERTY INSURANCE 524 PRODUCTION - STEAM PI-S 525 ALL RISK & MISCELLANEOUS P110P-L2 526 TOTAL ACCOUNT 924 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 80 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 527 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * * 528 529 925-OP INJURIES & DAMAGES LABOR 11,358,326 4,889,402 197,208 1,327,623 118 530 926-OP EMPLOYEE PENSIONS & BENEFITS LABOR 74,961,492 32,268,564 1,301,515 8,761,907 781 531 927-OP FRANCHISE REQUIREMENTS P101P 532 533 928-OP REGULATORY COMMISSION EXPENSES 534 FERC ADMIN ASSESS & SECURITIES 535 CAPACITY RELATED PI-SHO 2,711,513 2,477,997 233,516 536 ENERGY RELATED KWH-T 921,198 921,198 537 FERC RATE CASE T-PLT 538 FERC ORDER 472 KWH-O 924,547 924,547 539 FERC OTHER T-100 104,606 104,606 540 FERC - OREGON HYDRO FEE PI-HO 260,632 232,325 28,307 541 SEC EXPENSES NONE 542 IDAHO PUC -RATE CASE OTH-EXP 543 -OTHER OTH-EXP 332,773 544 OREGON PUC -RATE CASE OTH-EXP 545 -OTHER OTH-EXP 546 TOTAL ACCOUNT 928 5,255,269 547 548 929-OP DUPLICATE CHARGES-CR LABOR 549 9301-OP GENERAL ADVERTISING LABOR 550 9302-OP MISCELLANEOUS EXPENSES LABOR 3,870,432 1,666,099 67,200 452,397 40 551 931-OP RENTS L GEN-PLT 552 TOTAL ADM & GEN OPERATION 170,503,996 553 554 935-MT GENERAL PLANT MAINTENANCE L GEN-PLT 7,723,111 2,654,017 250,103 1,798,027 106 555 556 TOTAL ADMIN & GENERAL EXPENSES 178,227,107 557 558 416 MERCHANDISING EXPENSE M-EXP 4,523,796 10,097 559 560 TOTAL OPER & MAINT EXPENSES 888,823,963 138,136,693 16,516,367 492,817,416 48,778,156 3,521 561 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 81 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 527 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * * 528 529 925-OP INJURIES & DAMAGES LABOR 530 926-OP EMPLOYEE PENSIONS & BENEFITS LABOR 531 927-OP FRANCHISE REQUIREMENTS P101P 532 533 928-OP REGULATORY COMMISSION EXPENSES 534 FERC ADMIN ASSESS & SECURITIES 535 CAPACITY RELATED PI-SHO 536 ENERGY RELATED KWH-T 537 FERC RATE CASE T-PLT 538 FERC ORDER 472 KWH-O 539 FERC OTHER T-100 540 FERC - OREGON HYDRO FEE PI-HO 541 SEC EXPENSES NONE 542 IDAHO PUC -RATE CASE OTH-EXP 543 -OTHER OTH-EXP 544 OREGON PUC -RATE CASE OTH-EXP 545 -OTHER OTH-EXP 546 TOTAL ACCOUNT 928 547 548 929-OP DUPLICATE CHARGES-CR LABOR 549 9301-OP GENERAL ADVERTISING LABOR 550 9302-OP MISCELLANEOUS EXPENSES LABOR 551 931-OP RENTS L GEN-PLT 552 TOTAL ADM & GEN OPERATION 553 554 935-MT GENERAL PLANT MAINTENANCE L GEN-PLT 555 556 TOTAL ADMIN & GENERAL EXPENSES 557 558 416 MERCHANDISING EXPENSE M-EXP 559 560 TOTAL OPER & MAINT EXPENSES 561 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * 561,227 25,488 929,963 460,903 35,800 47,159 23,373 13,070 136,389 3,703,924 168,210 6,137,472 3,041,817 236,272 311,234 154,252 86,255 900,127 191,242 8,685 316,892 157,056 12,199 16,070 7,964 4,454 46,476 581,579 27,123 710,320 352,045 44,388 159,781 79,190 44,282 462,107 1,421,031 704,283 88,801 319,651 158,423 88,588 924,469 17,911,499 814,448 47,352,090 23,468,360 1,634,918 1,990,925 986,730 551,763 5,757,998 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 82 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 527 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * * 528 529 925-OP INJURIES & DAMAGES LABOR 530 926-OP EMPLOYEE PENSIONS & BENEFITS LABOR 531 927-OP FRANCHISE REQUIREMENTS P101P 532 533 928-OP REGULATORY COMMISSION EXPENSES 534 FERC ADMIN ASSESS & SECURITIES 535 CAPACITY RELATED PI-SHO 536 ENERGY RELATED KWH-T 537 FERC RATE CASE T-PLT 538 FERC ORDER 472 KWH-O 539 FERC OTHER T-100 540 FERC - OREGON HYDRO FEE PI-HO 541 SEC EXPENSES NONE 542 IDAHO PUC -RATE CASE OTH-EXP 543 -OTHER OTH-EXP 544 OREGON PUC -RATE CASE OTH-EXP 545 -OTHER OTH-EXP 546 TOTAL ACCOUNT 928 547 548 929-OP DUPLICATE CHARGES-CR LABOR 549 9301-OP GENERAL ADVERTISING LABOR 550 9302-OP MISCELLANEOUS EXPENSES LABOR 551 931-OP RENTS L GEN-PLT 552 TOTAL ADM & GEN OPERATION 553 554 935-MT GENERAL PLANT MAINTENANCE L GEN-PLT 555 556 TOTAL ADMIN & GENERAL EXPENSES 557 558 416 MERCHANDISING EXPENSE M-EXP 559 560 TOTAL OPER & MAINT EXPENSES 561 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * 67,596 64,088 31,763 27,085 641,530 18,182 90,514 446,116 422,963 209,626 178,750 4,233,903 119,997 597,364 23,034 21,839 10,823 9,229 218,606 6,196 30,843 229,027 45,522 22,561 92,639 155,929 8,384 5,984 458,180 91,068 45,135 185,328 16,772 11,970 2,853,745 3,301,093 1,636,068 1,141,837 18,706,555 554,840 2,894,436 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 83 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 527 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * * 528 529 925-OP INJURIES & DAMAGES LABOR 530 926-OP EMPLOYEE PENSIONS & BENEFITS LABOR 531 927-OP FRANCHISE REQUIREMENTS P101P 532 533 928-OP REGULATORY COMMISSION EXPENSES 534 FERC ADMIN ASSESS & SECURITIES 535 CAPACITY RELATED PI-SHO 536 ENERGY RELATED KWH-T 537 FERC RATE CASE T-PLT 538 FERC ORDER 472 KWH-O 539 FERC OTHER T-100 540 FERC - OREGON HYDRO FEE PI-HO 541 SEC EXPENSES NONE 542 IDAHO PUC -RATE CASE OTH-EXP 543 -OTHER OTH-EXP 544 OREGON PUC -RATE CASE OTH-EXP 545 -OTHER OTH-EXP 546 TOTAL ACCOUNT 928 547 548 929-OP DUPLICATE CHARGES-CR LABOR 549 9301-OP GENERAL ADVERTISING LABOR 550 9302-OP MISCELLANEOUS EXPENSES LABOR 551 931-OP RENTS L GEN-PLT 552 TOTAL ADM & GEN OPERATION 553 554 935-MT GENERAL PLANT MAINTENANCE L GEN-PLT 555 556 TOTAL ADMIN & GENERAL EXPENSES 557 558 416 MERCHANDISING EXPENSE M-EXP 559 560 TOTAL OPER & MAINT EXPENSES 561 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * 128,926 1,104,997 535,923 850,871 7,292,644 3,536,926 43,932 376,536 182,620 3,681,466 32,460,816 5,388,730 19,150,720 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 84 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 527 * * * TABLE 5 - OPERATION & MAINTENANCE EXPENSES * * * 528 529 925-OP INJURIES & DAMAGES LABOR 530 926-OP EMPLOYEE PENSIONS & BENEFITS LABOR 531 927-OP FRANCHISE REQUIREMENTS P101P 532 533 928-OP REGULATORY COMMISSION EXPENSES 534 FERC ADMIN ASSESS & SECURITIES 535 CAPACITY RELATED PI-SHO 536 ENERGY RELATED KWH-T 537 FERC RATE CASE T-PLT 538 FERC ORDER 472 KWH-O 539 FERC OTHER T-100 540 FERC - OREGON HYDRO FEE PI-HO 541 SEC EXPENSES NONE 542 IDAHO PUC -RATE CASE OTH-EXP 543 -OTHER OTH-EXP 544 OREGON PUC -RATE CASE OTH-EXP 545 -OTHER OTH-EXP 546 TOTAL ACCOUNT 928 547 548 929-OP DUPLICATE CHARGES-CR LABOR 549 9301-OP GENERAL ADVERTISING LABOR 550 9302-OP MISCELLANEOUS EXPENSES LABOR 551 931-OP RENTS L GEN-PLT 552 TOTAL ADM & GEN OPERATION 553 554 935-MT GENERAL PLANT MAINTENANCE L GEN-PLT 555 556 TOTAL ADMIN & GENERAL EXPENSES 557 558 416 MERCHANDISING EXPENSE M-EXP 559 560 TOTAL OPER & MAINT EXPENSES 561 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - 332,773 332,773 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 85 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 562 * * * TABLE 6 - DEPRECIATION & AMORTIZATION EXPENSE * * 563 564 DEPRECIATION EXPENSE 565 310-316 STEAM PRODUCTION PI-S 9,212,961 9,212,961 566 330-336 HYDRAULIC PRODUCTION PI-H 24,324,647 24,324,647 567 340-346 OTHER PRODUCTION (BASELOAD) PI-S 13,251,245 13,251,245 568 340-346 OTHER PRODUCTION (PEAKERS) PI-O 5,921,482 5,921,482 569 TOTAL PRODUCTION PLANT 52,710,336 570 571 TRANSMISSION PLANT 572 350 LAND & LAND RIGHTS T-350 399,371 399,371 573 352 STRUCTURES & IMPROVEMENTS T-352 1,842,519 1,842,519 574 353 STATION EQUIPMENT T-353 9,871,275 9,869,626 1,650 575 354 TOWERS & FIXTURES T-354 2,772,265 2,772,265 576 355 POLES & FIXTURES T-355 5,903,489 5,903,489 577 356 OVERHEAD CONDUCTORS & DEVICES T-356 3,930,824 3,930,806 18 578 359 ROADS & TRAILS T-359 2,583 2,583 579 TOTAL TRANSMISSION PLANT 24,722,326 580 581 DISTRIBUTION PLANT 582 360 LAND & LAND RIGHTS D360N 29,909 583 361 STRUCTURES & IMPROVEMENTS D361N 1,323,816 584 362 STATION EQUIPMENT D362N 6,442,540 585 363 STORAGE BATTERY EQUIPMENT PI-S 8,383,489 8,383,489 586 364 POLES, TOWERS & FIXTURES D364 6,133,059 587 365 OVERHEAD CONDUCTORS & DEVICES D365 3,477,165 588 366 UNDERGROUND CONDUIT D366 1,307,020 589 367 UNDERGROUND CONDUCTORS & DEVI D367 7,813,424 590 368 LINE TRANSFORMERS D368 13,756,994 591 369 SERVICES SERVICE 1,118,272 592 370 METERS METER 5,718,060 593 371 INSTALLATIONS ON CUSTOMER PREMI CUSTINS 180,039 594 373 STREET LIGHTING SYSTEMS STLIGHT 208,773 595 TOTAL DISTRIBUTION PLANT 55,892,559 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 86 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 562 * * * TABLE 6 - DEPRECIATION & AMORTIZATION EXPENSE * 563 564 DEPRECIATION EXPENSE 565 310-316 STEAM PRODUCTION PI-S 566 330-336 HYDRAULIC PRODUCTION PI-H 567 340-346 OTHER PRODUCTION (BASELOAD) PI-S 568 340-346 OTHER PRODUCTION (PEAKERS) PI-O 569 TOTAL PRODUCTION PLANT 570 571 TRANSMISSION PLANT 572 350 LAND & LAND RIGHTS T-350 573 352 STRUCTURES & IMPROVEMENTS T-352 574 353 STATION EQUIPMENT T-353 575 354 TOWERS & FIXTURES T-354 576 355 POLES & FIXTURES T-355 577 356 OVERHEAD CONDUCTORS & DEVICES T-356 578 359 ROADS & TRAILS T-359 579 TOTAL TRANSMISSION PLANT 580 581 DISTRIBUTION PLANT 582 360 LAND & LAND RIGHTS D360N 583 361 STRUCTURES & IMPROVEMENTS D361N 584 362 STATION EQUIPMENT D362N 585 363 STORAGE BATTERY EQUIPMENT PI-S 586 364 POLES, TOWERS & FIXTURES D364 587 365 OVERHEAD CONDUCTORS & DEVICES D365 588 366 UNDERGROUND CONDUIT D366 589 367 UNDERGROUND CONDUCTORS & DEVI D367 590 368 LINE TRANSFORMERS D368 591 369 SERVICES SERVICE 592 370 METERS METER 593 371 INSTALLATIONS ON CUSTOMER PREMI CUSTINS 594 373 STREET LIGHTING SYSTEMS STLIGHT 595 TOTAL DISTRIBUTION PLANT IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * 29,909 0 1,311,337 12,478 6,371,385 71,155 3,840,542 1,903,427 42,753 2,088,062 1,034,873 32,114 621,627 308,087 158,384 4,746,136 2,352,252 514,570 2,255,892 1,118,052 625,195 6,524,314 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 87 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 562 * * * TABLE 6 - DEPRECIATION & AMORTIZATION EXPENSE * 563 564 DEPRECIATION EXPENSE 565 310-316 STEAM PRODUCTION PI-S 566 330-336 HYDRAULIC PRODUCTION PI-H 567 340-346 OTHER PRODUCTION (BASELOAD) PI-S 568 340-346 OTHER PRODUCTION (PEAKERS) PI-O 569 TOTAL PRODUCTION PLANT 570 571 TRANSMISSION PLANT 572 350 LAND & LAND RIGHTS T-350 573 352 STRUCTURES & IMPROVEMENTS T-352 574 353 STATION EQUIPMENT T-353 575 354 TOWERS & FIXTURES T-354 576 355 POLES & FIXTURES T-355 577 356 OVERHEAD CONDUCTORS & DEVICES T-356 578 359 ROADS & TRAILS T-359 579 TOTAL TRANSMISSION PLANT 580 581 DISTRIBUTION PLANT 582 360 LAND & LAND RIGHTS D360N 583 361 STRUCTURES & IMPROVEMENTS D361N 584 362 STATION EQUIPMENT D362N 585 363 STORAGE BATTERY EQUIPMENT PI-S 586 364 POLES, TOWERS & FIXTURES D364 587 365 OVERHEAD CONDUCTORS & DEVICES D365 588 366 UNDERGROUND CONDUIT D366 589 367 UNDERGROUND CONDUCTORS & DEVI D367 590 368 LINE TRANSFORMERS D368 591 369 SERVICES SERVICE 592 370 METERS METER 593 371 INSTALLATIONS ON CUSTOMER PREMI CUSTINS 594 373 STREET LIGHTING SYSTEMS STLIGHT 595 TOTAL DISTRIBUTION PLANT IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * 231,568 114,769 215,374 106,742 146,375 72,546 134,036 66,430 3,233,542 1,118,272 5,718,060 180,039 208,773 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 88 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 562 * * * TABLE 6 - DEPRECIATION & AMORTIZATION EXPENSE * 563 564 DEPRECIATION EXPENSE 565 310-316 STEAM PRODUCTION PI-S 566 330-336 HYDRAULIC PRODUCTION PI-H 567 340-346 OTHER PRODUCTION (BASELOAD) PI-S 568 340-346 OTHER PRODUCTION (PEAKERS) PI-O 569 TOTAL PRODUCTION PLANT 570 571 TRANSMISSION PLANT 572 350 LAND & LAND RIGHTS T-350 573 352 STRUCTURES & IMPROVEMENTS T-352 574 353 STATION EQUIPMENT T-353 575 354 TOWERS & FIXTURES T-354 576 355 POLES & FIXTURES T-355 577 356 OVERHEAD CONDUCTORS & DEVICES T-356 578 359 ROADS & TRAILS T-359 579 TOTAL TRANSMISSION PLANT 580 581 DISTRIBUTION PLANT 582 360 LAND & LAND RIGHTS D360N 583 361 STRUCTURES & IMPROVEMENTS D361N 584 362 STATION EQUIPMENT D362N 585 363 STORAGE BATTERY EQUIPMENT PI-S 586 364 POLES, TOWERS & FIXTURES D364 587 365 OVERHEAD CONDUCTORS & DEVICES D365 588 366 UNDERGROUND CONDUIT D366 589 367 UNDERGROUND CONDUCTORS & DEVI D367 590 368 LINE TRANSFORMERS D368 591 369 SERVICES SERVICE 592 370 METERS METER 593 371 INSTALLATIONS ON CUSTOMER PREMI CUSTINS 594 373 STREET LIGHTING SYSTEMS STLIGHT 595 TOTAL DISTRIBUTION PLANT IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 89 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 562 * * * TABLE 6 - DEPRECIATION & AMORTIZATION EXPENSE * 563 564 DEPRECIATION EXPENSE 565 310-316 STEAM PRODUCTION PI-S 566 330-336 HYDRAULIC PRODUCTION PI-H 567 340-346 OTHER PRODUCTION (BASELOAD) PI-S 568 340-346 OTHER PRODUCTION (PEAKERS) PI-O 569 TOTAL PRODUCTION PLANT 570 571 TRANSMISSION PLANT 572 350 LAND & LAND RIGHTS T-350 573 352 STRUCTURES & IMPROVEMENTS T-352 574 353 STATION EQUIPMENT T-353 575 354 TOWERS & FIXTURES T-354 576 355 POLES & FIXTURES T-355 577 356 OVERHEAD CONDUCTORS & DEVICES T-356 578 359 ROADS & TRAILS T-359 579 TOTAL TRANSMISSION PLANT 580 581 DISTRIBUTION PLANT 582 360 LAND & LAND RIGHTS D360N 583 361 STRUCTURES & IMPROVEMENTS D361N 584 362 STATION EQUIPMENT D362N 585 363 STORAGE BATTERY EQUIPMENT PI-S 586 364 POLES, TOWERS & FIXTURES D364 587 365 OVERHEAD CONDUCTORS & DEVICES D365 588 366 UNDERGROUND CONDUIT D366 589 367 UNDERGROUND CONDUCTORS & DEVI D367 590 368 LINE TRANSFORMERS D368 591 369 SERVICES SERVICE 592 370 METERS METER 593 371 INSTALLATIONS ON CUSTOMER PREMI CUSTINS 594 373 STREET LIGHTING SYSTEMS STLIGHT 595 TOTAL DISTRIBUTION PLANT IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 90 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 596 * * * TABLE 6 - DEPRECIATION & AMORTIZATION EXPENSE * * 597 598 GENERAL PLANT 599 389 LAND & LAND RIGHTS P-PTD 600 390 STRUCTURES & IMPROVEMENTS P-PTD 3,220,402 1,106,678 104,289 749,746 44 601 391 OFFICE FURNITURE & EQUIPMENT P-PTD 6,688,226 2,298,383 216,590 1,557,094 91 602 392 TRANSPORTATION EQUIPMENT P-PTD 69,294 23,813 2,244 16,132 1 603 393 STORES EQUIPMENT P-PTD 217,528 74,753 7,044 50,643 3 604 394 TOOLS, SHOP & GARAGE EQUIPMENT P-PTD 773,482 265,804 25,048 180,075 11 605 395 LABORATORY EQUIPMENT P-PTD 747,582 256,904 24,210 174,045 10 606 396 POWER OPERATED EQUIPMENT P-PTD 607 397 COMMUNICATIONS EQUIPMENT P-PTD 5,370,906 1,845,691 173,930 1,250,407 73 608 398 MISCELLANEOUS EQUIPMENT P-PTD 823,363 282,946 26,664 191,688 11 609 TOTAL GENERAL PLANT 17,910,784 610 611 DEPRECIATION ON DISALLOWED COSTS P101P (283,814) (97,532) (9,191) (66,075) (4) 612 TOTAL DEPRECIATION EXPENSE 150,952,190 61,229,781 6,492,310 28,824,414 1,909 613 614 MORTIZATION EXPENSE 615 302/FRANCHISES AND CONSENTS P101P 1,480,576 508,794 47,947 344,695 20 616 303/MISCELLANEOUS INTANGIBLE PLA PI-H 4,230,438 4,230,438 617 DJUSTMENTS, GAINS & LOSSES P101P 14,385 4,943 466 3,349 0 618 TOTAL AM0RTIZATION EXPENSE 5,725,400 4,744,176 48,412 348,044 20 619 620 TOTAL DEPRECIATION & AM0RTIZATION EXP 156,677,590 65,973,958 6,540,722 29,172,458 1,929 621 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 91 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 596 * * * TABLE 6 - DEPRECIATION & AMORTIZATION EXPENSE * 597 598 GENERAL PLANT 599 389 LAND & LAND RIGHTS P-PTD 600 390 STRUCTURES & IMPROVEMENTS P-PTD 601 391 OFFICE FURNITURE & EQUIPMENT P-PTD 602 392 TRANSPORTATION EQUIPMENT P-PTD 603 393 STORES EQUIPMENT P-PTD 604 394 TOOLS, SHOP & GARAGE EQUIPMENT P-PTD 605 395 LABORATORY EQUIPMENT P-PTD 606 396 POWER OPERATED EQUIPMENT P-PTD 607 397 COMMUNICATIONS EQUIPMENT P-PTD 608 398 MISCELLANEOUS EQUIPMENT P-PTD 609 TOTAL GENERAL PLANT 610 611 DEPRECIATION ON DISALLOWED COSTS P101P 612 TOTAL DEPRECIATION EXPENSE 613 614 MORTIZATION EXPENSE 615 302/FRANCHISES AND CONSENTS P101P 616 303/MISCELLANEOUS INTANGIBLE PLA PI-H 617 DJUSTMENTS, GAINS & LOSSES P101P 618 TOTAL AM0RTIZATION EXPENSE 619 620 TOTAL DEPRECIATION & AM0RTIZATION EXP 621 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * 242,508 11,310 296,191 146,796 18,509 66,626 33,021 18,465 192,691 503,648 23,488 615,138 304,871 38,440 138,371 68,579 38,348 400,186 5,218 243 6,373 3,159 398 1,434 711 397 4,146 16,381 764 20,007 9,916 1,250 4,500 2,230 1,247 13,016 58,246 2,716 71,140 35,258 4,446 16,002 7,931 4,435 46,281 56,296 2,625 68,758 34,077 4,297 15,467 7,665 4,286 44,731 404,449 18,862 493,980 244,823 30,869 111,117 55,071 30,795 321,365 62,002 2,892 75,727 37,532 4,732 17,034 8,442 4,721 49,265 (21,372) (997) (26,103) (12,937) (1,631) (5,872) (2,910) (1,627) (16,982) 9,040,007 145,538 12,917,578 6,402,133 849,132 2,620,571 1,298,792 726,262 7,579,012 111,493 5,200 136,173 67,489 8,510 30,631 15,181 8,489 88,589 1,083 51 1,323 656 83 298 148 82 861 112,576 5,250 137,497 68,145 8,592 30,929 15,329 8,572 89,450 9,152,583 150,788 13,055,074 6,470,278 857,725 2,651,500 1,314,121 734,834 7,668,462 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 92 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 596 * * * TABLE 6 - DEPRECIATION & AMORTIZATION EXPENSE * 597 598 GENERAL PLANT 599 389 LAND & LAND RIGHTS P-PTD 600 390 STRUCTURES & IMPROVEMENTS P-PTD 601 391 OFFICE FURNITURE & EQUIPMENT P-PTD 602 392 TRANSPORTATION EQUIPMENT P-PTD 603 393 STORES EQUIPMENT P-PTD 604 394 TOOLS, SHOP & GARAGE EQUIPMENT P-PTD 605 395 LABORATORY EQUIPMENT P-PTD 606 396 POWER OPERATED EQUIPMENT P-PTD 607 397 COMMUNICATIONS EQUIPMENT P-PTD 608 398 MISCELLANEOUS EQUIPMENT P-PTD 609 TOTAL GENERAL PLANT 610 611 DEPRECIATION ON DISALLOWED COSTS P101P 612 TOTAL DEPRECIATION EXPENSE 613 614 MORTIZATION EXPENSE 615 302/FRANCHISES AND CONSENTS P101P 616 303/MISCELLANEOUS INTANGIBLE PLA PI-H 617 DJUSTMENTS, GAINS & LOSSES P101P 618 TOTAL AM0RTIZATION EXPENSE 619 620 TOTAL DEPRECIATION & AM0RTIZATION EXP 621 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * 95,500 18,982 9,408 38,629 65,020 3,496 2,495 198,338 39,422 19,538 80,225 135,035 7,260 5,182 2,055 408 202 831 1,399 75 54 6,451 1,282 635 2,609 4,392 236 169 22,937 4,559 2,260 9,278 15,617 840 599 22,169 4,406 2,184 8,967 15,094 812 579 159,273 31,657 15,690 64,424 108,438 5,830 4,161 24,417 4,853 2,405 9,876 16,624 894 638 (8,416) (1,673) (829) (3,404) (5,730) (308) (220) 3,756,265 831,250 411,979 1,329,707 6,073,947 227,907 193,695 43,906 8,727 4,325 17,759 29,893 1,607 1,147 427 85 42 173 290 16 11 44,333 8,812 4,367 17,932 30,183 1,623 1,158 3,800,597 840,062 416,347 1,347,639 6,104,130 229,530 194,854 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 93 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 596 * * * TABLE 6 - DEPRECIATION & AMORTIZATION EXPENSE * 597 598 GENERAL PLANT 599 389 LAND & LAND RIGHTS P-PTD 600 390 STRUCTURES & IMPROVEMENTS P-PTD 601 391 OFFICE FURNITURE & EQUIPMENT P-PTD 602 392 TRANSPORTATION EQUIPMENT P-PTD 603 393 STORES EQUIPMENT P-PTD 604 394 TOOLS, SHOP & GARAGE EQUIPMENT P-PTD 605 395 LABORATORY EQUIPMENT P-PTD 606 396 POWER OPERATED EQUIPMENT P-PTD 607 397 COMMUNICATIONS EQUIPMENT P-PTD 608 398 MISCELLANEOUS EQUIPMENT P-PTD 609 TOTAL GENERAL PLANT 610 611 DEPRECIATION ON DISALLOWED COSTS P101P 612 TOTAL DEPRECIATION EXPENSE 613 614 MORTIZATION EXPENSE 615 302/FRANCHISES AND CONSENTS P101P 616 303/MISCELLANEOUS INTANGIBLE PLA PI-H 617 DJUSTMENTS, GAINS & LOSSES P101P 618 TOTAL AM0RTIZATION EXPENSE 619 620 TOTAL DEPRECIATION & AM0RTIZATION EXP 621 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 94 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 596 * * * TABLE 6 - DEPRECIATION & AMORTIZATION EXPENSE * 597 598 GENERAL PLANT 599 389 LAND & LAND RIGHTS P-PTD 600 390 STRUCTURES & IMPROVEMENTS P-PTD 601 391 OFFICE FURNITURE & EQUIPMENT P-PTD 602 392 TRANSPORTATION EQUIPMENT P-PTD 603 393 STORES EQUIPMENT P-PTD 604 394 TOOLS, SHOP & GARAGE EQUIPMENT P-PTD 605 395 LABORATORY EQUIPMENT P-PTD 606 396 POWER OPERATED EQUIPMENT P-PTD 607 397 COMMUNICATIONS EQUIPMENT P-PTD 608 398 MISCELLANEOUS EQUIPMENT P-PTD 609 TOTAL GENERAL PLANT 610 611 DEPRECIATION ON DISALLOWED COSTS P101P 612 TOTAL DEPRECIATION EXPENSE 613 614 MORTIZATION EXPENSE 615 302/FRANCHISES AND CONSENTS P101P 616 303/MISCELLANEOUS INTANGIBLE PLA PI-H 617 DJUSTMENTS, GAINS & LOSSES P101P 618 TOTAL AM0RTIZATION EXPENSE 619 620 TOTAL DEPRECIATION & AM0RTIZATION EXP 621 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 95 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 622 * * * TABLE 7 - TAXES OTHER THAN INCOME TAXES * * 623 624 TAXES OTHER THAN INCOME 625 FEDERAL TAXES NONE 626 FIC LABOR 627 FUT LABOR 628 LESS PAYROLL DEDUCTION LABOR 629 630 STATE TAXES 631 AD VALOREM TAXES 632 JIM BRIDGER STATION PI-S 633 VALM PI-S 634 OTHER-PRODUCTION PLANT PI-HO 7,828,388 6,978,158 850,229 635 OTHER-TRANSMISSION PLANT T-PLT 6,547,695 6,547,311 384 636 OTHER-DISTRIBUTION PLANT D3602N 8,749,620 637 OTHER-GENERAL PLANT GEN-PLT 1,735,401 596,364 56,199 404,021 24 638 639 LICENSES - HYDRO PROJECTS PI-H 4,067 4,067 640 641 REGULATORY COMMISSION FEES 642 STATE OF IDAHO P101P 2,616,251 899,064 84,724 609,093 36 643 STATE OF OREGON NONE 644 645 FRANCHISE TAXES 646 STATE OF OREGON NONE 647 648 OTHER STATE TAXES 649 UNEMPLOYMENT TAXES NONE 650 HYDRO GENERATION TA KWH-TA 1,806,165 651 IRRIGATION-PIC KWH-TA 313,744 652 653 TOTAL TAXES OTHER THAN INCOME 29,601,331 8,477,654 991,152 7,560,424 444 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 96 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 622 * * * TABLE 7 - TAXES OTHER THAN INCOME TAXES * * 623 624 TAXES OTHER THAN INCOME 625 FEDERAL TAXES NONE 626 FIC LABOR 627 FUT LABOR 628 LESS PAYROLL DEDUCTION LABOR 629 630 STATE TAXES 631 AD VALOREM TAXES 632 JIM BRIDGER STATION PI-S 633 VALM PI-S 634 OTHER-PRODUCTION PLANT PI-HO 635 OTHER-TRANSMISSION PLANT T-PLT 636 OTHER-DISTRIBUTION PLANT D3602N 637 OTHER-GENERAL PLANT GEN-PLT 638 639 LICENSES - HYDRO PROJECTS PI-H 640 641 REGULATORY COMMISSION FEES 642 STATE OF IDAHO P101P 643 STATE OF OREGON NONE 644 645 FRANCHISE TAXES 646 STATE OF OREGON NONE 647 648 OTHER STATE TAXES 649 UNEMPLOYMENT TAXES NONE 650 HYDRO GENERATION TA KWH-TA 651 IRRIGATION-PIC KWH-TA 652 653 TOTAL TAXES OTHER THAN INCOME IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * 1,548,179 16,510 2,115,783 1,048,612 132,217 475,930 235,878 131,899 1,376,448 130,682 6,095 159,611 79,105 9,974 35,903 17,794 9,950 103,837 197,013 9,188 240,625 119,257 15,037 54,127 26,826 15,001 156,542 1,875,874 31,792 2,516,018 1,246,974 157,228 565,960 280,498 156,850 1,636,826 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 97 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 622 * * * TABLE 7 - TAXES OTHER THAN INCOME TAXES * * 623 624 TAXES OTHER THAN INCOME 625 FEDERAL TAXES NONE 626 FIC LABOR 627 FUT LABOR 628 LESS PAYROLL DEDUCTION LABOR 629 630 STATE TAXES 631 AD VALOREM TAXES 632 JIM BRIDGER STATION PI-S 633 VALM PI-S 634 OTHER-PRODUCTION PLANT PI-HO 635 OTHER-TRANSMISSION PLANT T-PLT 636 OTHER-DISTRIBUTION PLANT D3602N 637 OTHER-GENERAL PLANT GEN-PLT 638 639 LICENSES - HYDRO PROJECTS PI-H 640 641 REGULATORY COMMISSION FEES 642 STATE OF IDAHO P101P 643 STATE OF OREGON NONE 644 645 FRANCHISE TAXES 646 STATE OF OREGON NONE 647 648 OTHER STATE TAXES 649 UNEMPLOYMENT TAXES NONE 650 HYDRO GENERATION TA KWH-TA 651 IRRIGATION-PIC KWH-TA 652 653 TOTAL TAXES OTHER THAN INCOME IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * 682,187 135,592 67,201 275,936 464,455 24,972 17,823 51,463 10,229 5,070 20,816 35,038 1,884 1,345 77,584 15,421 7,643 31,382 52,822 2,840 2,027 811,234 161,241 79,913 328,134 552,314 29,696 21,194 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 98 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 622 * * * TABLE 7 - TAXES OTHER THAN INCOME TAXES * * 623 624 TAXES OTHER THAN INCOME 625 FEDERAL TAXES NONE 626 FIC LABOR 627 FUT LABOR 628 LESS PAYROLL DEDUCTION LABOR 629 630 STATE TAXES 631 AD VALOREM TAXES 632 JIM BRIDGER STATION PI-S 633 VALM PI-S 634 OTHER-PRODUCTION PLANT PI-HO 635 OTHER-TRANSMISSION PLANT T-PLT 636 OTHER-DISTRIBUTION PLANT D3602N 637 OTHER-GENERAL PLANT GEN-PLT 638 639 LICENSES - HYDRO PROJECTS PI-H 640 641 REGULATORY COMMISSION FEES 642 STATE OF IDAHO P101P 643 STATE OF OREGON NONE 644 645 FRANCHISE TAXES 646 STATE OF OREGON NONE 647 648 OTHER STATE TAXES 649 UNEMPLOYMENT TAXES NONE 650 HYDRO GENERATION TA KWH-TA 651 IRRIGATION-PIC KWH-TA 652 653 TOTAL TAXES OTHER THAN INCOME IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 99 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 622 * * * TABLE 7 - TAXES OTHER THAN INCOME TAXES * * 623 624 TAXES OTHER THAN INCOME 625 FEDERAL TAXES NONE 626 FIC LABOR 627 FUT LABOR 628 LESS PAYROLL DEDUCTION LABOR 629 630 STATE TAXES 631 AD VALOREM TAXES 632 JIM BRIDGER STATION PI-S 633 VALM PI-S 634 OTHER-PRODUCTION PLANT PI-HO 635 OTHER-TRANSMISSION PLANT T-PLT 636 OTHER-DISTRIBUTION PLANT D3602N 637 OTHER-GENERAL PLANT GEN-PLT 638 639 LICENSES - HYDRO PROJECTS PI-H 640 641 REGULATORY COMMISSION FEES 642 STATE OF IDAHO P101P 643 STATE OF OREGON NONE 644 645 FRANCHISE TAXES 646 STATE OF OREGON NONE 647 648 OTHER STATE TAXES 649 UNEMPLOYMENT TAXES NONE 650 HYDRO GENERATION TA KWH-TA 651 IRRIGATION-PIC KWH-TA 652 653 TOTAL TAXES OTHER THAN INCOME IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - 1,806,165 313,744 2,119,909 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 100 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 654 * * * TABLE 8 - REGULATORY DEBITS/CREDITS * * 655 656 REGULAT STATE OF IDAHO - Siemens LTP Amor PI-OS 1,075,354 754,483 320,871 657 REGULAT STATE OF IDAHO - Cloud Computing P101P 201,265 69,164 6,518 46,857 3 658 REGULAT STATE OF IDAHO - Wildfire Mitigation P-PTD 1,865,167 640,957 60,401 434,232 25 659 660 * * * TABLE 9 - INCOME TAXES * * 661 662 410/411 NET PROVISION FOR DEFER INC TAXES 663 CCOUNT #282 - RELATED P111P (15,882,182) (5,512,531) (519,478) (3,734,595) (219) 664 CCOUNTS #190 & #283 - RELATED DIT (1,242,756) (372,378) (35,091) (252,277) (15) 665 TOTAL NET PROVISION FOR DEFER IT (17,124,938) (5,884,910) (554,569) (3,986,872) (234) 666 667 411.4 INVESTMENT TAX CREDIT ADJUSTMEN P111P 23,926,476 8,304,618 782,592 5,626,160 330 668 669 SUMMARY OF INCOME TAXES 670 671 TOTAL FEDERAL INCOME TA TAX-REV 39,040,245 672 673 STATE INCOME TAXES 674 STATE OF IDAHO TAX-REV (3,747,326) 675 STATE OF OREGON TAX-REV 685,175 676 OTHER STATES TAX-REV 233,716 677 TOTAL STATE INCOME TAXES (2,828,435) 678 679 TOTAL OPERATING EXPENSES 1,119,191,586 680 681 NET OPERATING INCOME 287,458,444 682 683 Base-load Peak Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 101 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 654 * * * TABLE 8 - REGULATORY DEBITS/CREDITS * * 655 656 REGULAT STATE OF IDAHO - Siemens LTP Amor PI-OS 657 REGULAT STATE OF IDAHO - Cloud Computing P101P 658 REGULAT STATE OF IDAHO - Wildfire Mitigation P-PTD 659 660 * * * TABLE 9 - INCOME TAXES * * 661 662 410/411 NET PROVISION FOR DEFER INC TAXES 663 CCOUNT #282 - RELATED P111P 664 CCOUNTS #190 & #283 - RELATED DIT 665 TOTAL NET PROVISION FOR DEFER IT 666 667 411.4 INVESTMENT TAX CREDIT ADJUSTMEN P111P 668 669 SUMMARY OF INCOME TAXES 670 671 TOTAL FEDERAL INCOME TA TAX-REV 672 673 STATE INCOME TAXES 674 STATE OF IDAHO TAX-REV 675 STATE OF OREGON TAX-REV 676 OTHER STATES TAX-REV 677 TOTAL STATE INCOME TAXES 678 679 TOTAL OPERATING EXPENSES 680 681 NET OPERATING INCOME 682 683 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * 15,156 707 18,511 9,174 1,157 4,164 2,064 1,154 12,043 140,454 6,550 171,546 85,020 10,720 38,588 19,125 10,694 111,601 (1,090,022) (15,161) (1,475,372) (731,215) (92,197) (331,874) (164,482) (91,975) (959,821) (73,632) (1,024) (172,824) (85,654) (6,228) (25,372) (12,575) (6,213) (73,926) (1,163,654) (16,185) (1,648,196) (816,869) (98,425) (357,246) (177,056) (98,188) (1,033,747) 1,642,116 22,840 2,222,644 1,101,574 138,894 499,968 247,791 138,561 1,445,968 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 102 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 654 * * * TABLE 8 - REGULATORY DEBITS/CREDITS * * 655 656 REGULAT STATE OF IDAHO - Siemens LTP Amor PI-OS 657 REGULAT STATE OF IDAHO - Cloud Computing P101P 658 REGULAT STATE OF IDAHO - Wildfire Mitigation P-PTD 659 660 * * * TABLE 9 - INCOME TAXES * * 661 662 410/411 NET PROVISION FOR DEFER INC TAXES 663 CCOUNT #282 - RELATED P111P 664 CCOUNTS #190 & #283 - RELATED DIT 665 TOTAL NET PROVISION FOR DEFER IT 666 667 411.4 INVESTMENT TAX CREDIT ADJUSTMEN P111P 668 669 SUMMARY OF INCOME TAXES 670 671 TOTAL FEDERAL INCOME TA TAX-REV 672 673 STATE INCOME TAXES 674 STATE OF IDAHO TAX-REV 675 STATE OF OREGON TAX-REV 676 OTHER STATES TAX-REV 677 TOTAL STATE INCOME TAXES 678 679 TOTAL OPERATING EXPENSES 680 681 NET OPERATING INCOME 682 683 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * 5,968 1,186 588 2,414 4,064 218 156 55,311 10,994 5,449 22,373 37,658 2,025 1,445 (475,701) (94,551) (46,861) (192,415) (323,872) (17,413) (12,428) (36,639) (18,721) (9,279) (36,739) (21,894) (1,411) (864) (512,340) (113,272) (56,139) (229,154) (345,766) (18,824) (13,292) 716,642 142,440 70,595 289,873 487,913 26,233 18,723 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 103 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 654 * * * TABLE 8 - REGULATORY DEBITS/CREDITS * * 655 656 REGULAT STATE OF IDAHO - Siemens LTP Amor PI-OS 657 REGULAT STATE OF IDAHO - Cloud Computing P101P 658 REGULAT STATE OF IDAHO - Wildfire Mitigation P-PTD 659 660 * * * TABLE 9 - INCOME TAXES * * 661 662 410/411 NET PROVISION FOR DEFER INC TAXES 663 CCOUNT #282 - RELATED P111P 664 CCOUNTS #190 & #283 - RELATED DIT 665 TOTAL NET PROVISION FOR DEFER IT 666 667 411.4 INVESTMENT TAX CREDIT ADJUSTMEN P111P 668 669 SUMMARY OF INCOME TAXES 670 671 TOTAL FEDERAL INCOME TA TAX-REV 672 673 STATE INCOME TAXES 674 STATE OF IDAHO TAX-REV 675 STATE OF OREGON TAX-REV 676 OTHER STATES TAX-REV 677 TOTAL STATE INCOME TAXES 678 679 TOTAL OPERATING EXPENSES 680 681 NET OPERATING INCOME 682 683 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 104 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 654 * * * TABLE 8 - REGULATORY DEBITS/CREDITS * * 655 656 REGULAT STATE OF IDAHO - Siemens LTP Amor PI-OS 657 REGULAT STATE OF IDAHO - Cloud Computing P101P 658 REGULAT STATE OF IDAHO - Wildfire Mitigation P-PTD 659 660 * * * TABLE 9 - INCOME TAXES * * 661 662 410/411 NET PROVISION FOR DEFER INC TAXES 663 CCOUNT #282 - RELATED P111P 664 CCOUNTS #190 & #283 - RELATED DIT 665 TOTAL NET PROVISION FOR DEFER IT 666 667 411.4 INVESTMENT TAX CREDIT ADJUSTMEN P111P 668 669 SUMMARY OF INCOME TAXES 670 671 TOTAL FEDERAL INCOME TA TAX-REV 672 673 STATE INCOME TAXES 674 STATE OF IDAHO TAX-REV 675 STATE OF OREGON TAX-REV 676 OTHER STATES TAX-REV 677 TOTAL STATE INCOME TAXES 678 679 TOTAL OPERATING EXPENSES 680 681 NET OPERATING INCOME 682 683 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - 39,040,245 (3,747,326) 685,175 233,716 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 105 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 684 * * * TABLE 10 - DEVELOPMENT OF LABOR RELATED ALLOCATOR * * 685 STEAM POWER GENERATION 686 OPERATION 687 500 / SUPERVISION & ENGINEERING L-500 255,277 255,277 688 501 / FUEL PI-S 2,455,198 2,455,198 689 502 / STEAM EXPENSES 690 LABOR PI-S 1,542,164 1,542,164 691 OTHER PI-S 692 TOTAL ACCOUNT 502 693 505 / ELECTRIC EXPENSES 694 LABOR PI-S 600,571 600,571 695 OTHER PI-S 3,215,661 3,215,661 696 TOTAL ACCOUNT 505 697 506 / MISCELLANEOUS EXPENSES PI-S 698 507 / RENTS PI-S 699 STEAM OPERATION EXPENSES 8,068,870 700 701 MAINTENANCE 702 510 / SUPERVISION & ENGINEERING L-510 703 511 / STRUCTURES PI-S 631 631 704 512 / BOILER PLANT 705 LABOR PI-S 3,821,200 3,821,200 706 OTHER PI-S 707 TOTAL ACCOUNT 512 3,821,200 708 513 / ELECTRIC PLANT 709 LABOR PI-S 1,460,523 1,460,523 710 OTHER PI-S 711 TOTAL ACCOUNT 513 1,460,523 712 514 / MISCELLANEOUS STEAM PLANT PI-S 2,342,261 2,342,261 713 STEAM MAINTENANCE EXPENSES 7,624,615 714 TOTAL STEAM GENERATION EXPENSES 15,693,485 715 716 HYDRAULIC POWER GENERATION 717 535-OP SUPERVISION & ENGINEERING L-535 4,061,414 4,061,414 718 536-OP WATER FOR POWER PI-H 828,021 828,021 719 537-OP HYDRAULIC EXPENSES PI-H 6,006,734 6,006,734 720 538-OP ELECTRIC EXPENSES PI-H 1,448,837 1,448,837 721 539-OP MISCELLANEOUS EXPENSES PI-H 3,262,471 3,262,471 722 540-OP RENTS 723 TOTAL HYDRAULIC OPERATION EXPENSES 15,607,477 724 541-MT SUPERVISION & ENGINEERING L-541 86,513 86,513 725 542-MT STRUCTURES PI-H 554,103 554,103 726 543-MT RESERVOIRS, DAMS & WATERWAYS PI-H 244,475 244,475 727 544-MT ELECTRIC PLANT PI-H 1,725,993 1,725,993 728 545-MT MISCELLANEOUS HYDRAULIC PLANT PI-H 2,075,350 2,075,350 729 TOTAL HYDRAULIC MAINTENANCE EXPENSES 4,686,434 730 TOTAL HYDRAULIC GENERATION EXPENSES 20,293,911 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 106 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 684 * * * TABLE 10 - DEVELOPMENT OF LABOR RELATED ALLOC 685 STEAM POWER GENERATION 686 OPERATION 687 500 / SUPERVISION & ENGINEERING L-500 688 501 / FUEL PI-S 689 502 / STEAM EXPENSES 690 LABOR PI-S 691 OTHER PI-S 692 TOTAL ACCOUNT 502 693 505 / ELECTRIC EXPENSES 694 LABOR PI-S 695 OTHER PI-S 696 TOTAL ACCOUNT 505 697 506 / MISCELLANEOUS EXPENSES PI-S 698 507 / RENTS PI-S 699 STEAM OPERATION EXPENSES 700 701 MAINTENANCE 702 510 / SUPERVISION & ENGINEERING L-510 703 511 / STRUCTURES PI-S 704 512 / BOILER PLANT 705 LABOR PI-S 706 OTHER PI-S 707 TOTAL ACCOUNT 512 708 513 / ELECTRIC PLANT 709 LABOR PI-S 710 OTHER PI-S 711 TOTAL ACCOUNT 513 712 514 / MISCELLANEOUS STEAM PLANT PI-S 713 STEAM MAINTENANCE EXPENSES 714 TOTAL STEAM GENERATION EXPENSES 715 716 HYDRAULIC POWER GENERATION 717 535-OP SUPERVISION & ENGINEERING L-535 718 536-OP WATER FOR POWER PI-H 719 537-OP HYDRAULIC EXPENSES PI-H 720 538-OP ELECTRIC EXPENSES PI-H 721 539-OP MISCELLANEOUS EXPENSES PI-H 722 540-OP RENTS 723 TOTAL HYDRAULIC OPERATION EXPENSES 724 541-MT SUPERVISION & ENGINEERING L-541 725 542-MT STRUCTURES PI-H 726 543-MT RESERVOIRS, DAMS & WATERWAYS PI-H 727 544-MT ELECTRIC PLANT PI-H 728 545-MT MISCELLANEOUS HYDRAULIC PLANT PI-H 729 TOTAL HYDRAULIC MAINTENANCE EXPENSES 730 TOTAL HYDRAULIC GENERATION EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 107 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 684 * * * TABLE 10 - DEVELOPMENT OF LABOR RELATED ALLOC 685 STEAM POWER GENERATION 686 OPERATION 687 500 / SUPERVISION & ENGINEERING L-500 688 501 / FUEL PI-S 689 502 / STEAM EXPENSES 690 LABOR PI-S 691 OTHER PI-S 692 TOTAL ACCOUNT 502 693 505 / ELECTRIC EXPENSES 694 LABOR PI-S 695 OTHER PI-S 696 TOTAL ACCOUNT 505 697 506 / MISCELLANEOUS EXPENSES PI-S 698 507 / RENTS PI-S 699 STEAM OPERATION EXPENSES 700 701 MAINTENANCE 702 510 / SUPERVISION & ENGINEERING L-510 703 511 / STRUCTURES PI-S 704 512 / BOILER PLANT 705 LABOR PI-S 706 OTHER PI-S 707 TOTAL ACCOUNT 512 708 513 / ELECTRIC PLANT 709 LABOR PI-S 710 OTHER PI-S 711 TOTAL ACCOUNT 513 712 514 / MISCELLANEOUS STEAM PLANT PI-S 713 STEAM MAINTENANCE EXPENSES 714 TOTAL STEAM GENERATION EXPENSES 715 716 HYDRAULIC POWER GENERATION 717 535-OP SUPERVISION & ENGINEERING L-535 718 536-OP WATER FOR POWER PI-H 719 537-OP HYDRAULIC EXPENSES PI-H 720 538-OP ELECTRIC EXPENSES PI-H 721 539-OP MISCELLANEOUS EXPENSES PI-H 722 540-OP RENTS 723 TOTAL HYDRAULIC OPERATION EXPENSES 724 541-MT SUPERVISION & ENGINEERING L-541 725 542-MT STRUCTURES PI-H 726 543-MT RESERVOIRS, DAMS & WATERWAYS PI-H 727 544-MT ELECTRIC PLANT PI-H 728 545-MT MISCELLANEOUS HYDRAULIC PLANT PI-H 729 TOTAL HYDRAULIC MAINTENANCE EXPENSES 730 TOTAL HYDRAULIC GENERATION EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 108 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 684 * * * TABLE 10 - DEVELOPMENT OF LABOR RELATED ALLOC 685 STEAM POWER GENERATION 686 OPERATION 687 500 / SUPERVISION & ENGINEERING L-500 688 501 / FUEL PI-S 689 502 / STEAM EXPENSES 690 LABOR PI-S 691 OTHER PI-S 692 TOTAL ACCOUNT 502 693 505 / ELECTRIC EXPENSES 694 LABOR PI-S 695 OTHER PI-S 696 TOTAL ACCOUNT 505 697 506 / MISCELLANEOUS EXPENSES PI-S 698 507 / RENTS PI-S 699 STEAM OPERATION EXPENSES 700 701 MAINTENANCE 702 510 / SUPERVISION & ENGINEERING L-510 703 511 / STRUCTURES PI-S 704 512 / BOILER PLANT 705 LABOR PI-S 706 OTHER PI-S 707 TOTAL ACCOUNT 512 708 513 / ELECTRIC PLANT 709 LABOR PI-S 710 OTHER PI-S 711 TOTAL ACCOUNT 513 712 514 / MISCELLANEOUS STEAM PLANT PI-S 713 STEAM MAINTENANCE EXPENSES 714 TOTAL STEAM GENERATION EXPENSES 715 716 HYDRAULIC POWER GENERATION 717 535-OP SUPERVISION & ENGINEERING L-535 718 536-OP WATER FOR POWER PI-H 719 537-OP HYDRAULIC EXPENSES PI-H 720 538-OP ELECTRIC EXPENSES PI-H 721 539-OP MISCELLANEOUS EXPENSES PI-H 722 540-OP RENTS 723 TOTAL HYDRAULIC OPERATION EXPENSES 724 541-MT SUPERVISION & ENGINEERING L-541 725 542-MT STRUCTURES PI-H 726 543-MT RESERVOIRS, DAMS & WATERWAYS PI-H 727 544-MT ELECTRIC PLANT PI-H 728 545-MT MISCELLANEOUS HYDRAULIC PLANT PI-H 729 TOTAL HYDRAULIC MAINTENANCE EXPENSES 730 TOTAL HYDRAULIC GENERATION EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 109 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 684 * * * TABLE 10 - DEVELOPMENT OF LABOR RELATED ALLOC 685 STEAM POWER GENERATION 686 OPERATION 687 500 / SUPERVISION & ENGINEERING L-500 688 501 / FUEL PI-S 689 502 / STEAM EXPENSES 690 LABOR PI-S 691 OTHER PI-S 692 TOTAL ACCOUNT 502 693 505 / ELECTRIC EXPENSES 694 LABOR PI-S 695 OTHER PI-S 696 TOTAL ACCOUNT 505 697 506 / MISCELLANEOUS EXPENSES PI-S 698 507 / RENTS PI-S 699 STEAM OPERATION EXPENSES 700 701 MAINTENANCE 702 510 / SUPERVISION & ENGINEERING L-510 703 511 / STRUCTURES PI-S 704 512 / BOILER PLANT 705 LABOR PI-S 706 OTHER PI-S 707 TOTAL ACCOUNT 512 708 513 / ELECTRIC PLANT 709 LABOR PI-S 710 OTHER PI-S 711 TOTAL ACCOUNT 513 712 514 / MISCELLANEOUS STEAM PLANT PI-S 713 STEAM MAINTENANCE EXPENSES 714 TOTAL STEAM GENERATION EXPENSES 715 716 HYDRAULIC POWER GENERATION 717 535-OP SUPERVISION & ENGINEERING L-535 718 536-OP WATER FOR POWER PI-H 719 537-OP HYDRAULIC EXPENSES PI-H 720 538-OP ELECTRIC EXPENSES PI-H 721 539-OP MISCELLANEOUS EXPENSES PI-H 722 540-OP RENTS 723 TOTAL HYDRAULIC OPERATION EXPENSES 724 541-MT SUPERVISION & ENGINEERING L-541 725 542-MT STRUCTURES PI-H 726 543-MT RESERVOIRS, DAMS & WATERWAYS PI-H 727 544-MT ELECTRIC PLANT PI-H 728 545-MT MISCELLANEOUS HYDRAULIC PLANT PI-H 729 TOTAL HYDRAULIC MAINTENANCE EXPENSES 730 TOTAL HYDRAULIC GENERATION EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 110 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 731 * * * TABLE 10 - DEVELOPMENT OF LABOR RELATED ALLOCATOR * * * 732 733 OTHER POWER GENERATION 734 546-OP SUPERVISION & ENGINEERING L-546 495,643 347,750 147,893 735 548-OP GENERATING EXPENSES PI-OS 3,102,974 2,177,089 925,885 736 549-OP MISCELLANEOUS EXPENSES PI-OS 355,488 249,415 106,073 737 550-OP RENTS PI-OS 738 TOTAL OTHER POWER OPER EXPENSES 3,954,105 739 740 551-MT SUPERVISION & ENGINEERING L-551 741 552-MT STRUCTURES PI-OS 41,290 28,970 12,320 742 553-MT GENERATING & ELECTRIC PLANT PI-OS 54,507 38,243 16,264 743 554-MT MISCELLANEOUS EXPENSES PI-OS 662,259 464,650 197,609 744 TOTAL OTHER POWER MAINT EXPENSES 758,056 745 TOTAL OTHER POWER GEN EXPENSES 4,712,161 746 555 PURCHASED POWER 747 556 LOAD CONTROL & DISPATCHING EXPE PP-KW 748 557 OTHER PI-SHO 4,311,949 3,940,603 371,346 749 TOTAL OTHER POWER SUPPLY EXPENSES 4,311,949 750 751 TOTAL PRODUCTION EXPENSES 45,011,506 752 753 TRANSMISSION EXPENSES 754 560-OP SUPERVISION & ENGINEERING L-560 2,283,367 2,283,156 211 755 561-OP LOAD DISPATCHING T-PLT 2,929,396 2,929,224 172 756 562-OP STATION EXPENSES T-353 1,806,653 1,806,351 302 757 563-OP OVERHEAD LINE EXPENSES T-354-356 410,892 410,891 1 758 565-OP TRANSMISSION OF ELECTRICITY BY OT KWH-T 759 566-OP MISCELLANEOUS EXPENSES T-PLT 760 567-OP RENTS T-PLT 761 TOTAL TRANSMISSION OPERATION 7,430,307 762 568-MT SUPERVISION & ENGINEERING L-568 87,233 87,226 7 763 569-MT STRUCTURES T-352 1,383,185 1,383,185 764 570-MT STATION EQUIPMENT T-353 2,232,077 2,231,704 373 765 571-MT OVERHEAD LINES T-354-356 830,425 830,424 1 766 573-MT MISCELLANEOUS PLANT T-PLT 3,376 3,376 0 767 TOTAL TRANSMISSION MAINTENANCE 4,536,296 768 TOTAL TRANSMISSION EXPENSES 11,966,603 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 111 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 731 * * * TABLE 10 - DEVELOPMENT OF LABOR RELATED ALLOC 732 733 OTHER POWER GENERATION 734 546-OP SUPERVISION & ENGINEERING L-546 735 548-OP GENERATING EXPENSES PI-OS 736 549-OP MISCELLANEOUS EXPENSES PI-OS 737 550-OP RENTS PI-OS 738 TOTAL OTHER POWER OPER EXPENSES 739 740 551-MT SUPERVISION & ENGINEERING L-551 741 552-MT STRUCTURES PI-OS 742 553-MT GENERATING & ELECTRIC PLANT PI-OS 743 554-MT MISCELLANEOUS EXPENSES PI-OS 744 TOTAL OTHER POWER MAINT EXPENSES 745 TOTAL OTHER POWER GEN EXPENSES 746 555 PURCHASED POWER 747 556 LOAD CONTROL & DISPATCHING EXPE PP-KW 748 557 OTHER PI-SHO 749 TOTAL OTHER POWER SUPPLY EXPENSES 750 751 TOTAL PRODUCTION EXPENSES 752 753 TRANSMISSION EXPENSES 754 560-OP SUPERVISION & ENGINEERING L-560 755 561-OP LOAD DISPATCHING T-PLT 756 562-OP STATION EXPENSES T-353 757 563-OP OVERHEAD LINE EXPENSES T-354-356 758 565-OP TRANSMISSION OF ELECTRICITY BY OT KWH-T 759 566-OP MISCELLANEOUS EXPENSES T-PLT 760 567-OP RENTS T-PLT 761 TOTAL TRANSMISSION OPERATION 762 568-MT SUPERVISION & ENGINEERING L-568 763 569-MT STRUCTURES T-352 764 570-MT STATION EQUIPMENT T-353 765 571-MT OVERHEAD LINES T-354-356 766 573-MT MISCELLANEOUS PLANT T-PLT 767 TOTAL TRANSMISSION MAINTENANCE 768 TOTAL TRANSMISSION EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 112 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 731 * * * TABLE 10 - DEVELOPMENT OF LABOR RELATED ALLOC 732 733 OTHER POWER GENERATION 734 546-OP SUPERVISION & ENGINEERING L-546 735 548-OP GENERATING EXPENSES PI-OS 736 549-OP MISCELLANEOUS EXPENSES PI-OS 737 550-OP RENTS PI-OS 738 TOTAL OTHER POWER OPER EXPENSES 739 740 551-MT SUPERVISION & ENGINEERING L-551 741 552-MT STRUCTURES PI-OS 742 553-MT GENERATING & ELECTRIC PLANT PI-OS 743 554-MT MISCELLANEOUS EXPENSES PI-OS 744 TOTAL OTHER POWER MAINT EXPENSES 745 TOTAL OTHER POWER GEN EXPENSES 746 555 PURCHASED POWER 747 556 LOAD CONTROL & DISPATCHING EXPE PP-KW 748 557 OTHER PI-SHO 749 TOTAL OTHER POWER SUPPLY EXPENSES 750 751 TOTAL PRODUCTION EXPENSES 752 753 TRANSMISSION EXPENSES 754 560-OP SUPERVISION & ENGINEERING L-560 755 561-OP LOAD DISPATCHING T-PLT 756 562-OP STATION EXPENSES T-353 757 563-OP OVERHEAD LINE EXPENSES T-354-356 758 565-OP TRANSMISSION OF ELECTRICITY BY OT KWH-T 759 566-OP MISCELLANEOUS EXPENSES T-PLT 760 567-OP RENTS T-PLT 761 TOTAL TRANSMISSION OPERATION 762 568-MT SUPERVISION & ENGINEERING L-568 763 569-MT STRUCTURES T-352 764 570-MT STATION EQUIPMENT T-353 765 571-MT OVERHEAD LINES T-354-356 766 573-MT MISCELLANEOUS PLANT T-PLT 767 TOTAL TRANSMISSION MAINTENANCE 768 TOTAL TRANSMISSION EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 113 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 731 * * * TABLE 10 - DEVELOPMENT OF LABOR RELATED ALLOC 732 733 OTHER POWER GENERATION 734 546-OP SUPERVISION & ENGINEERING L-546 735 548-OP GENERATING EXPENSES PI-OS 736 549-OP MISCELLANEOUS EXPENSES PI-OS 737 550-OP RENTS PI-OS 738 TOTAL OTHER POWER OPER EXPENSES 739 740 551-MT SUPERVISION & ENGINEERING L-551 741 552-MT STRUCTURES PI-OS 742 553-MT GENERATING & ELECTRIC PLANT PI-OS 743 554-MT MISCELLANEOUS EXPENSES PI-OS 744 TOTAL OTHER POWER MAINT EXPENSES 745 TOTAL OTHER POWER GEN EXPENSES 746 555 PURCHASED POWER 747 556 LOAD CONTROL & DISPATCHING EXPE PP-KW 748 557 OTHER PI-SHO 749 TOTAL OTHER POWER SUPPLY EXPENSES 750 751 TOTAL PRODUCTION EXPENSES 752 753 TRANSMISSION EXPENSES 754 560-OP SUPERVISION & ENGINEERING L-560 755 561-OP LOAD DISPATCHING T-PLT 756 562-OP STATION EXPENSES T-353 757 563-OP OVERHEAD LINE EXPENSES T-354-356 758 565-OP TRANSMISSION OF ELECTRICITY BY OT KWH-T 759 566-OP MISCELLANEOUS EXPENSES T-PLT 760 567-OP RENTS T-PLT 761 TOTAL TRANSMISSION OPERATION 762 568-MT SUPERVISION & ENGINEERING L-568 763 569-MT STRUCTURES T-352 764 570-MT STATION EQUIPMENT T-353 765 571-MT OVERHEAD LINES T-354-356 766 573-MT MISCELLANEOUS PLANT T-PLT 767 TOTAL TRANSMISSION MAINTENANCE 768 TOTAL TRANSMISSION EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 114 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 731 * * * TABLE 10 - DEVELOPMENT OF LABOR RELATED ALLOC 732 733 OTHER POWER GENERATION 734 546-OP SUPERVISION & ENGINEERING L-546 735 548-OP GENERATING EXPENSES PI-OS 736 549-OP MISCELLANEOUS EXPENSES PI-OS 737 550-OP RENTS PI-OS 738 TOTAL OTHER POWER OPER EXPENSES 739 740 551-MT SUPERVISION & ENGINEERING L-551 741 552-MT STRUCTURES PI-OS 742 553-MT GENERATING & ELECTRIC PLANT PI-OS 743 554-MT MISCELLANEOUS EXPENSES PI-OS 744 TOTAL OTHER POWER MAINT EXPENSES 745 TOTAL OTHER POWER GEN EXPENSES 746 555 PURCHASED POWER 747 556 LOAD CONTROL & DISPATCHING EXPE PP-KW 748 557 OTHER PI-SHO 749 TOTAL OTHER POWER SUPPLY EXPENSES 750 751 TOTAL PRODUCTION EXPENSES 752 753 TRANSMISSION EXPENSES 754 560-OP SUPERVISION & ENGINEERING L-560 755 561-OP LOAD DISPATCHING T-PLT 756 562-OP STATION EXPENSES T-353 757 563-OP OVERHEAD LINE EXPENSES T-354-356 758 565-OP TRANSMISSION OF ELECTRICITY BY OT KWH-T 759 566-OP MISCELLANEOUS EXPENSES T-PLT 760 567-OP RENTS T-PLT 761 TOTAL TRANSMISSION OPERATION 762 568-MT SUPERVISION & ENGINEERING L-568 763 569-MT STRUCTURES T-352 764 570-MT STATION EQUIPMENT T-353 765 571-MT OVERHEAD LINES T-354-356 766 573-MT MISCELLANEOUS PLANT T-PLT 767 TOTAL TRANSMISSION MAINTENANCE 768 TOTAL TRANSMISSION EXPENSES IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 115 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 769 * * * TABLE 10 - DEVELOPMENT OF LABOR RELATED ALLOCATOR * * 770 771 DISTRIBUTION EXPENSES 772 580-OP SUPERVISION & ENGINEERING L-580 2,854,543 773 581-OP LOAD DISPATCHING D3601 4,009,091 774 582-OP STATION EXPENSES D362 936,981 775 583-OP OVERHEAD LINE EXPENSES D-364-365 3,354,617 776 584-OP UNDERGROUND LINE EXPENSES D-366-367 1,352,112 777 585-OP STREET LIGHTING & SIGNAL SYSTEMS STLIGHT 19,552 778 586-OP METER EXPENSES METER 4,041,475 779 587-OP CUSTOMER INSTALLATIONS EXPENSE CUSTINS 685,851 780 588-OP MISCELLANEOUS EXPENSES D3601 2,749,719 781 589-OP RENTS D3601 782 TOTAL DISTRIBUTION OPERATION 20,003,940 783 784 590-MT SUPERVISION & ENGINEERING L-590 8,912 785 591-MT STRUCTURES D361 786 592-MT STATION EQUIPMENT D362 2,588,326 787 593-MT OVERHEAD LINES D-364-365 4,830,600 788 594-MT UNDERGROUND LINES D-366-367 300,238 789 595-MT LINE TRANSFORMERS D368 24,370 790 596-MT STREET LIGHTING & SIGNAL SYSTEMS STLIGHT 118,851 791 597-MT METERS METER 656,208 792 598-MT MISCELLANEOUS PLANT D3601 76,191 793 TOTAL DISTRIBUTION MAINTENANCE 8,603,695 794 TOTAL DISTRIBUTION EXPENSES 28,607,635 795 796 CUSTOMER ACCOUNTING EXPENSES 797 901-OP SUPERVISION L-901 610,646 798 902-OP METER READING M-READ 1,098,173 799 903-OP CUSTOMER RECORDS & COLLECTIONS C-RECOR 9,412,221 800 904-OP UNCOLLECTIBLE ACCOUNTS UAR 801 905-OP MISC CUSTOMER ACCOUNTS EXPEN L 798-800 802 TOTAL CUSTOMER ACCOUNTING EXPENSES 11,121,040 803 804 CUSTOMER SERVICES & INFORMATION EXPENSES 805 907-OP SUPERVISION L-907 806,758 118,649 806 908-OP CUSTOMER ASSISTANCE D-908 4,555,597 669,988 807 908 / ENERGY EFFICIENCY RIDER NONE 808 909-OP INFORMATION & INSTRUCTIONAL C-ASSIST 809 912 DEMO AND SELLING EXPENSES L 806-808 300,634 44,214 810 TOTAL CUST SERV & INFO EXPENSES 5,662,989 811 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 116 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 769 * * * TABLE 10 - DEVELOPMENT OF LABOR RELATED ALLOC 770 771 DISTRIBUTION EXPENSES 772 580-OP SUPERVISION & ENGINEERING L-580 773 581-OP LOAD DISPATCHING D3601 774 582-OP STATION EXPENSES D362 775 583-OP OVERHEAD LINE EXPENSES D-364-365 776 584-OP UNDERGROUND LINE EXPENSES D-366-367 777 585-OP STREET LIGHTING & SIGNAL SYSTEMS STLIGHT 778 586-OP METER EXPENSES METER 779 587-OP CUSTOMER INSTALLATIONS EXPENSE CUSTINS 780 588-OP MISCELLANEOUS EXPENSES D3601 781 589-OP RENTS D3601 782 TOTAL DISTRIBUTION OPERATION 783 784 590-MT SUPERVISION & ENGINEERING L-590 785 591-MT STRUCTURES D361 786 592-MT STATION EQUIPMENT D362 787 593-MT OVERHEAD LINES D-364-365 788 594-MT UNDERGROUND LINES D-366-367 789 595-MT LINE TRANSFORMERS D368 790 596-MT STREET LIGHTING & SIGNAL SYSTEMS STLIGHT 791 597-MT METERS METER 792 598-MT MISCELLANEOUS PLANT D3601 793 TOTAL DISTRIBUTION MAINTENANCE 794 TOTAL DISTRIBUTION EXPENSES 795 796 CUSTOMER ACCOUNTING EXPENSES 797 901-OP SUPERVISION L-901 798 902-OP METER READING M-READ 799 903-OP CUSTOMER RECORDS & COLLECTIONS C-RECOR 800 904-OP UNCOLLECTIBLE ACCOUNTS UAR 801 905-OP MISC CUSTOMER ACCOUNTS EXPEN L 798-800 802 TOTAL CUSTOMER ACCOUNTING EXPENSES 803 804 CUSTOMER SERVICES & INFORMATION EXPENSE 805 907-OP SUPERVISION L-907 806 908-OP CUSTOMER ASSISTANCE D-908 807 908 / ENERGY EFFICIENCY RIDER NONE 808 909-OP INFORMATION & INSTRUCTIONAL C-ASSIST 809 912 DEMO AND SELLING EXPENSES L 806-808 810 TOTAL CUST SERV & INFO EXPENSES 811 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * 365,851 16,800 742,003 367,747 37,399 59,505 29,492 16,491 172,096 771,834 35,996 942,691 467,211 58,909 212,052 105,096 58,768 613,279 896,734 40,248 2,072,014 1,026,919 25,911 796,505 394,759 99,459 529,379 24,688 646,565 320,446 40,404 145,440 72,082 40,307 420,630 2,584 116 3,296 1,633 63 8 4 2 24 2,477,145 111,181 2,983,670 1,478,749 37,311 176,865 87,657 22,085 3,996 1,981 1,108 11,557 14,668 684 17,915 8,879 1,120 4,030 1,997 1,117 11,655 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 117 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 769 * * * TABLE 10 - DEVELOPMENT OF LABOR RELATED ALLOC 770 771 DISTRIBUTION EXPENSES 772 580-OP SUPERVISION & ENGINEERING L-580 773 581-OP LOAD DISPATCHING D3601 774 582-OP STATION EXPENSES D362 775 583-OP OVERHEAD LINE EXPENSES D-364-365 776 584-OP UNDERGROUND LINE EXPENSES D-366-367 777 585-OP STREET LIGHTING & SIGNAL SYSTEMS STLIGHT 778 586-OP METER EXPENSES METER 779 587-OP CUSTOMER INSTALLATIONS EXPENSE CUSTINS 780 588-OP MISCELLANEOUS EXPENSES D3601 781 589-OP RENTS D3601 782 TOTAL DISTRIBUTION OPERATION 783 784 590-MT SUPERVISION & ENGINEERING L-590 785 591-MT STRUCTURES D361 786 592-MT STATION EQUIPMENT D362 787 593-MT OVERHEAD LINES D-364-365 788 594-MT UNDERGROUND LINES D-366-367 789 595-MT LINE TRANSFORMERS D368 790 596-MT STREET LIGHTING & SIGNAL SYSTEMS STLIGHT 791 597-MT METERS METER 792 598-MT MISCELLANEOUS PLANT D3601 793 TOTAL DISTRIBUTION MAINTENANCE 794 TOTAL DISTRIBUTION EXPENSES 795 796 CUSTOMER ACCOUNTING EXPENSES 797 901-OP SUPERVISION L-901 798 902-OP METER READING M-READ 799 903-OP CUSTOMER RECORDS & COLLECTIONS C-RECOR 800 904-OP UNCOLLECTIBLE ACCOUNTS UAR 801 905-OP MISC CUSTOMER ACCOUNTS EXPEN L 798-800 802 TOTAL CUSTOMER ACCOUNTING EXPENSES 803 804 CUSTOMER SERVICES & INFORMATION EXPENSE 805 907-OP SUPERVISION L-907 806 908-OP CUSTOMER ASSISTANCE D-908 807 908 / ENERGY EFFICIENCY RIDER NONE 808 909-OP INFORMATION & INSTRUCTIONAL C-ASSIST 809 912 DEMO AND SELLING EXPENSES L 806-808 810 TOTAL CUST SERV & INFO EXPENSES 811 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * 85,293 49,357 24,462 34,500 730,780 6,377 116,389 303,950 60,413 29,942 122,944 206,939 11,126 7,941 153,631 76,142 41,045 20,343 19,552 4,041,475 685,851 208,470 41,436 20,536 84,324 141,933 7,631 5,447 12 240 119 2 684 123 0 221,227 109,643 9,114 4,517 5,728 118,851 656,208 5,776 1,148 569 2,336 3,933 211 151 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 118 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 769 * * * TABLE 10 - DEVELOPMENT OF LABOR RELATED ALLOC 770 771 DISTRIBUTION EXPENSES 772 580-OP SUPERVISION & ENGINEERING L-580 773 581-OP LOAD DISPATCHING D3601 774 582-OP STATION EXPENSES D362 775 583-OP OVERHEAD LINE EXPENSES D-364-365 776 584-OP UNDERGROUND LINE EXPENSES D-366-367 777 585-OP STREET LIGHTING & SIGNAL SYSTEMS STLIGHT 778 586-OP METER EXPENSES METER 779 587-OP CUSTOMER INSTALLATIONS EXPENSE CUSTINS 780 588-OP MISCELLANEOUS EXPENSES D3601 781 589-OP RENTS D3601 782 TOTAL DISTRIBUTION OPERATION 783 784 590-MT SUPERVISION & ENGINEERING L-590 785 591-MT STRUCTURES D361 786 592-MT STATION EQUIPMENT D362 787 593-MT OVERHEAD LINES D-364-365 788 594-MT UNDERGROUND LINES D-366-367 789 595-MT LINE TRANSFORMERS D368 790 596-MT STREET LIGHTING & SIGNAL SYSTEMS STLIGHT 791 597-MT METERS METER 792 598-MT MISCELLANEOUS PLANT D3601 793 TOTAL DISTRIBUTION MAINTENANCE 794 TOTAL DISTRIBUTION EXPENSES 795 796 CUSTOMER ACCOUNTING EXPENSES 797 901-OP SUPERVISION L-901 798 902-OP METER READING M-READ 799 903-OP CUSTOMER RECORDS & COLLECTIONS C-RECOR 800 904-OP UNCOLLECTIBLE ACCOUNTS UAR 801 905-OP MISC CUSTOMER ACCOUNTS EXPEN L 798-800 802 TOTAL CUSTOMER ACCOUNTING EXPENSES 803 804 CUSTOMER SERVICES & INFORMATION EXPENSE 805 907-OP SUPERVISION L-907 806 908-OP CUSTOMER ASSISTANCE D-908 807 908 / ENERGY EFFICIENCY RIDER NONE 808 909-OP INFORMATION & INSTRUCTIONAL C-ASSIST 809 912 DEMO AND SELLING EXPENSES L 806-808 810 TOTAL CUST SERV & INFO EXPENSES 811 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * 63,803 546,843 1,098,173 9,412,221 688,109 3,885,609 256,420 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 119 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 769 * * * TABLE 10 - DEVELOPMENT OF LABOR RELATED ALLOC 770 771 DISTRIBUTION EXPENSES 772 580-OP SUPERVISION & ENGINEERING L-580 773 581-OP LOAD DISPATCHING D3601 774 582-OP STATION EXPENSES D362 775 583-OP OVERHEAD LINE EXPENSES D-364-365 776 584-OP UNDERGROUND LINE EXPENSES D-366-367 777 585-OP STREET LIGHTING & SIGNAL SYSTEMS STLIGHT 778 586-OP METER EXPENSES METER 779 587-OP CUSTOMER INSTALLATIONS EXPENSE CUSTINS 780 588-OP MISCELLANEOUS EXPENSES D3601 781 589-OP RENTS D3601 782 TOTAL DISTRIBUTION OPERATION 783 784 590-MT SUPERVISION & ENGINEERING L-590 785 591-MT STRUCTURES D361 786 592-MT STATION EQUIPMENT D362 787 593-MT OVERHEAD LINES D-364-365 788 594-MT UNDERGROUND LINES D-366-367 789 595-MT LINE TRANSFORMERS D368 790 596-MT STREET LIGHTING & SIGNAL SYSTEMS STLIGHT 791 597-MT METERS METER 792 598-MT MISCELLANEOUS PLANT D3601 793 TOTAL DISTRIBUTION MAINTENANCE 794 TOTAL DISTRIBUTION EXPENSES 795 796 CUSTOMER ACCOUNTING EXPENSES 797 901-OP SUPERVISION L-901 798 902-OP METER READING M-READ 799 903-OP CUSTOMER RECORDS & COLLECTIONS C-RECOR 800 904-OP UNCOLLECTIBLE ACCOUNTS UAR 801 905-OP MISC CUSTOMER ACCOUNTS EXPEN L 798-800 802 TOTAL CUSTOMER ACCOUNTING EXPENSES 803 804 CUSTOMER SERVICES & INFORMATION EXPENSE 805 907-OP SUPERVISION L-907 806 908-OP CUSTOMER ASSISTANCE D-908 807 908 / ENERGY EFFICIENCY RIDER NONE 808 909-OP INFORMATION & INSTRUCTIONAL C-ASSIST 809 912 DEMO AND SELLING EXPENSES L 806-808 810 TOTAL CUST SERV & INFO EXPENSES 811 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 120 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 812 * * * TABLE 10 - DEVELOPMENT OF LABOR RELATED ALLOCATOR * * 813 814 DMINISTRATIVE & GENERAL EXPENSES 815 920-OP DMINISTRATIVE & GENERAL SALARIE LABOR 51,175,830 22,029,585 888,538 5,981,709 533 816 921-OP OFFICE SUPPLIES LABOR 218,898 94,229 3,801 25,586 2 817 922-OP DMIN & GENERAL EXP TRANSFERRED LABOR 818 923-OP OUTSIDE SERVICES O&M-M 819 924-OP PROPERTY INSURANCE 820 PRODUCTION - STEAM NONE 821 ALL RISK & MISCELLANEOUS P101P 363,208 124,815 11,762 84,559 5 822 TOTAL ACCOUNT 924 363,208 823 824 925-OP INJURIES & DAMAGES LABOR 126,578 54,488 2,198 14,795 1 825 926-OP EMPLOYEE PENSIONS & BENEFITS LABOR 826 927-OP FRANCHISE REQUIREMENTS NONE 827 928-OP REGULATORY COMMISSION EXPENSES 828 FERC ADMIN ASSESSMENTS NONE 829 FERC RATE CASE EXPENSE NONE 830 SEC EXPENSES NONE 831 IDAHO PUC - RATE CASE NONE 832 - OTHER NONE 833 OREGON PUC - RATE CASE NONE 834 -OTHER NONE 835 NEVADA PSC - RATE CASE NONE 836 -OTHER NONE 837 TOTAL ACCOUNT 928 838 839 929-OP DUPLICATE CHARGES-CR NONE 840 9301-OP GENERAL ADVERTISING LABOR 841 9302-OP MISCELLANEOUS EXPENSES LABOR 205,380 88,410 3,566 24,006 2 842 931-OP RENTS GEN-PLT 843 935-MT GENERAL PLANT MAINTENANCE GEN-PLT 993,286 341,339 32,166 231,248 14 844 TOTAL ADMIN & GENERAL EXPENSES 53,083,181 845 TOTAL OPER & MAINT EXPENSES 155,452,955 66,799,832 2,719,421 18,327,439 1,625 846 847 TOTAL LABOR - RATIO (%) 1.0000 0.4297 0.0175 0.1179 0.0000 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 121 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 812 * * * TABLE 10 - DEVELOPMENT OF LABOR RELATED ALLOC 813 814 DMINISTRATIVE & GENERAL EXPENSES 815 920-OP DMINISTRATIVE & GENERAL SALARIE LABOR 816 921-OP OFFICE SUPPLIES LABOR 817 922-OP DMIN & GENERAL EXP TRANSFERRED LABOR 818 923-OP OUTSIDE SERVICES O&M-M 819 924-OP PROPERTY INSURANCE 820 PRODUCTION - STEAM NONE 821 ALL RISK & MISCELLANEOUS P101P 822 TOTAL ACCOUNT 924 823 824 925-OP INJURIES & DAMAGES LABOR 825 926-OP EMPLOYEE PENSIONS & BENEFITS LABOR 826 927-OP FRANCHISE REQUIREMENTS NONE 827 928-OP REGULATORY COMMISSION EXPENSES 828 FERC ADMIN ASSESSMENTS NONE 829 FERC RATE CASE EXPENSE NONE 830 SEC EXPENSES NONE 831 IDAHO PUC - RATE CASE NONE 832 - OTHER NONE 833 OREGON PUC - RATE CASE NONE 834 -OTHER NONE 835 NEVADA PSC - RATE CASE NONE 836 -OTHER NONE 837 TOTAL ACCOUNT 928 838 839 929-OP DUPLICATE CHARGES-CR NONE 840 9301-OP GENERAL ADVERTISING LABOR 841 9302-OP MISCELLANEOUS EXPENSES LABOR 842 931-OP RENTS GEN-PLT 843 935-MT GENERAL PLANT MAINTENANCE GEN-PLT 844 TOTAL ADMIN & GENERAL EXPENSES 845 TOTAL OPER & MAINT EXPENSES 846 847 TOTAL LABOR - RATIO (%) IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * 2,528,650 114,836 4,190,021 2,076,633 161,302 212,478 105,307 58,886 614,512 10,816 491 17,922 8,883 690 909 450 252 2,629 27,351 1,276 33,405 16,556 2,088 7,514 3,724 2,083 21,732 6,254 284 10,364 5,136 399 526 260 146 1,520 10,148 461 16,816 8,334 647 853 423 236 2,466 74,798 3,488 91,356 45,277 5,709 20,550 10,185 5,695 59,433 7,716,213 350,549 12,741,408 6,314,821 493,495 667,861 331,001 185,090 1,931,534 0.0496 0.0023 0.0820 0.0406 0.0032 0.0043 0.0021 0.0012 0.0124 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 122 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 812 * * * TABLE 10 - DEVELOPMENT OF LABOR RELATED ALLOC 813 814 DMINISTRATIVE & GENERAL EXPENSES 815 920-OP DMINISTRATIVE & GENERAL SALARIE LABOR 816 921-OP OFFICE SUPPLIES LABOR 817 922-OP DMIN & GENERAL EXP TRANSFERRED LABOR 818 923-OP OUTSIDE SERVICES O&M-M 819 924-OP PROPERTY INSURANCE 820 PRODUCTION - STEAM NONE 821 ALL RISK & MISCELLANEOUS P101P 822 TOTAL ACCOUNT 924 823 824 925-OP INJURIES & DAMAGES LABOR 825 926-OP EMPLOYEE PENSIONS & BENEFITS LABOR 826 927-OP FRANCHISE REQUIREMENTS NONE 827 928-OP REGULATORY COMMISSION EXPENSES 828 FERC ADMIN ASSESSMENTS NONE 829 FERC RATE CASE EXPENSE NONE 830 SEC EXPENSES NONE 831 IDAHO PUC - RATE CASE NONE 832 - OTHER NONE 833 OREGON PUC - RATE CASE NONE 834 -OTHER NONE 835 NEVADA PSC - RATE CASE NONE 836 -OTHER NONE 837 TOTAL ACCOUNT 928 838 839 929-OP DUPLICATE CHARGES-CR NONE 840 9301-OP GENERAL ADVERTISING LABOR 841 9302-OP MISCELLANEOUS EXPENSES LABOR 842 931-OP RENTS GEN-PLT 843 935-MT GENERAL PLANT MAINTENANCE GEN-PLT 844 TOTAL ADMIN & GENERAL EXPENSES 845 TOTAL OPER & MAINT EXPENSES 846 847 TOTAL LABOR - RATIO (%) IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * 304,561 288,755 143,111 122,032 2,890,464 81,921 407,817 1,303 1,235 612 522 12,364 350 1,744 10,771 2,141 1,061 4,357 7,333 394 281 753 714 354 302 7,149 203 1,009 1,222 1,159 574 490 11,600 329 1,637 29,456 5,855 2,902 11,914 20,054 1,078 770 957,295 877,470 434,886 383,723 8,730,916 248,148 1,229,037 0.0062 0.0056 0.0028 0.0025 0.0562 0.0016 0.0079 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 123 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 812 * * * TABLE 10 - DEVELOPMENT OF LABOR RELATED ALLOC 813 814 DMINISTRATIVE & GENERAL EXPENSES 815 920-OP DMINISTRATIVE & GENERAL SALARIE LABOR 816 921-OP OFFICE SUPPLIES LABOR 817 922-OP DMIN & GENERAL EXP TRANSFERRED LABOR 818 923-OP OUTSIDE SERVICES O&M-M 819 924-OP PROPERTY INSURANCE 820 PRODUCTION - STEAM NONE 821 ALL RISK & MISCELLANEOUS P101P 822 TOTAL ACCOUNT 924 823 824 925-OP INJURIES & DAMAGES LABOR 825 926-OP EMPLOYEE PENSIONS & BENEFITS LABOR 826 927-OP FRANCHISE REQUIREMENTS NONE 827 928-OP REGULATORY COMMISSION EXPENSES 828 FERC ADMIN ASSESSMENTS NONE 829 FERC RATE CASE EXPENSE NONE 830 SEC EXPENSES NONE 831 IDAHO PUC - RATE CASE NONE 832 - OTHER NONE 833 OREGON PUC - RATE CASE NONE 834 -OTHER NONE 835 NEVADA PSC - RATE CASE NONE 836 -OTHER NONE 837 TOTAL ACCOUNT 928 838 839 929-OP DUPLICATE CHARGES-CR NONE 840 9301-OP GENERAL ADVERTISING LABOR 841 9302-OP MISCELLANEOUS EXPENSES LABOR 842 931-OP RENTS GEN-PLT 843 935-MT GENERAL PLANT MAINTENANCE GEN-PLT 844 TOTAL ADMIN & GENERAL EXPENSES 845 TOTAL OPER & MAINT EXPENSES 846 847 TOTAL LABOR - RATIO (%) IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * 580,885 4,978,651 2,414,642 2,485 21,296 10,328 1,437 12,314 5,972 2,331 19,980 9,691 1,749,115 14,991,305 7,270,771 0.0113 0.0964 0.0468 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 124 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 812 * * * TABLE 10 - DEVELOPMENT OF LABOR RELATED ALLOC 813 814 DMINISTRATIVE & GENERAL EXPENSES 815 920-OP DMINISTRATIVE & GENERAL SALARIE LABOR 816 921-OP OFFICE SUPPLIES LABOR 817 922-OP DMIN & GENERAL EXP TRANSFERRED LABOR 818 923-OP OUTSIDE SERVICES O&M-M 819 924-OP PROPERTY INSURANCE 820 PRODUCTION - STEAM NONE 821 ALL RISK & MISCELLANEOUS P101P 822 TOTAL ACCOUNT 924 823 824 925-OP INJURIES & DAMAGES LABOR 825 926-OP EMPLOYEE PENSIONS & BENEFITS LABOR 826 927-OP FRANCHISE REQUIREMENTS NONE 827 928-OP REGULATORY COMMISSION EXPENSES 828 FERC ADMIN ASSESSMENTS NONE 829 FERC RATE CASE EXPENSE NONE 830 SEC EXPENSES NONE 831 IDAHO PUC - RATE CASE NONE 832 - OTHER NONE 833 OREGON PUC - RATE CASE NONE 834 -OTHER NONE 835 NEVADA PSC - RATE CASE NONE 836 -OTHER NONE 837 TOTAL ACCOUNT 928 838 839 929-OP DUPLICATE CHARGES-CR NONE 840 9301-OP GENERAL ADVERTISING LABOR 841 9302-OP MISCELLANEOUS EXPENSES LABOR 842 931-OP RENTS GEN-PLT 843 935-MT GENERAL PLANT MAINTENANCE GEN-PLT 844 TOTAL ADMIN & GENERAL EXPENSES 845 TOTAL OPER & MAINT EXPENSES 846 847 TOTAL LABOR - RATIO (%) IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 125 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 848 *** TABLE 11 - FUNCTIONALIZATION ALLOCATORS ** 849 850 851 PRODUCTION DIRECT ASSIGNMENT ALLOCATORS 852 KWH GENERATION - BY STEAM UNITS KWH-S 100% 100% 853 KWH GENERATION - BY HYDRAULIC UNITS KWH-H 100% 100% 854 KWH GENERATION - BY OTHER UNITS KWH-O 100% 100% 855 KWH GENERATION - BY OTHER KWH-O 100% 100% 856 KWH GENERATION - ANNUAL KWH-T 100% 100% 857 555 PURCHASED POWER - CAPACIT PP-KW 100% 91% 9% 858 555 PURCHASED POWER - ENERG PP-KWH 100% 100% 859 555 PURCHASED POWER - OTHER PP-OT 100% 100% 860 555 PURCHASED POWER - TOTAL PP-T 100% 30% 3% 67% 861 TOTAL COGEN & SMALL POWER PROD COGEN-E 100% 100% 862 PRODUCTION - STEAM INVESTMENT PI-S 100% 100% 863 PRODUCTION - HYDRAULIC INVESTMENT PI-H 100% 100% 864 PRODUCTION - OTHER INVESTMENT PI-O 100% 100% 865 PRODUCTION - OTHER INVESTMENT - Baseload PI-OS 100% 70% 30% 866 TRANSMISSION DIRECT ASSIGNMENT ALLOCATORS 867 TRANSMISSION PLANT T-100 100%100% 868 TRANSMISSION DIRECT ASSIGNMENT T-Direct 100%100% 869 DISTRIBUTION DIRECT ASSIGNMENT ALLOCATORS 870 SUBSTATION CIAC CIAC 100% 871 SERVICES SERVICE 100% 872 METERS METER 100% 873 METER READING M-READ 100% 874 CUSTOMER RECORDS C-RECOR 100% 875 CUSTOMER ASSISTANCE C-ASSIST 100% 876 UNCOLLECTIBLE ACCOUNTS UAR 100% 877 INSTALLATIONS ON CUSTOMER PREMISES CUSTINS 100% 878 STREET LIGHTING SYSTEMS STLIGHT 100% 879 OTHER DIRECT ASSIGNMENT ALLOCATORS 880 MISC. REVENUE MISC-RE 100% 881 OTHER REVENUE OTH-REV 100% 882 OTHER EXPENSE OTH-EXP 100% 883 INCOME TAX AND REVENUE ALLOCATOR TAX-REV 100% 884 KWH-TA KWH-TA 100% 885 NULL REV. REQ. VALUE NONE 886 887 PRODUCTION ALLOCATORS 888 PRODUCTION - HYDRAULIC & OTHER INVESTMENT 1,664,974,337 1,484,143,992 180,830,345 889 L 21-23 PI-HO 100% 89% 11% 890 TOTAL PRODUCTION PLANT INVESTMENT 2,099,744,010 1,918,913,664 180,830,345 891 L 25 PI-SHO 100% 91% 9% 892 TRANSMISSION ALLOCATORS 893 350 LAND & LAND RIGHTS 39,364,923 39,364,923 894 L 31 T-350 100%100% 895 352 STRUCTURES & IMPROVEMENTS 96,459,348 96,459,348 DIRECT ASSIGNMENT ALLOCATORS DERIVED ALLOCATORS Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 126 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 848 *** TABLE 11 - FUNCTIONALIZATION ALLOCATORS ** 849 850 851 PRODUCTION DIRECT ASSIGNMENT ALLOCATORS 852 KWH GENERATION - BY STEAM UNITS KWH-S 853 KWH GENERATION - BY HYDRAULIC UNITS KWH-H 854 KWH GENERATION - BY OTHER UNITS KWH-O 855 KWH GENERATION - BY OTHER KWH-O 856 KWH GENERATION - ANNUAL KWH-T 857 555 PURCHASED POWER - CAPACIT PP-KW 858 555 PURCHASED POWER - ENERG PP-KWH 859 555 PURCHASED POWER - OTHER PP-OT 860 555 PURCHASED POWER - TOTAL PP-T 861 TOTAL COGEN & SMALL POWER PROD COGEN-E 862 PRODUCTION - STEAM INVESTMENT PI-S 863 PRODUCTION - HYDRAULIC INVESTMENT PI-H 864 PRODUCTION - OTHER INVESTMENT PI-O 865 PRODUCTION - OTHER INVESTMENT - Baseload PI-OS 866 TRANSMISSION DIRECT ASSIGNMENT ALLOCATORS 867 TRANSMISSION PLANT T-100 868 TRANSMISSION DIRECT ASSIGNMENT T-Direct 869 DISTRIBUTION DIRECT ASSIGNMENT ALLOCATORS 870 SUBSTATION CIAC CIAC 871 SERVICES SERVICE 872 METERS METER 873 METER READING M-READ 874 CUSTOMER RECORDS C-RECOR 875 CUSTOMER ASSISTANCE C-ASSIST 876 UNCOLLECTIBLE ACCOUNTS UAR 877 INSTALLATIONS ON CUSTOMER PREMISES CUSTINS 878 STREET LIGHTING SYSTEMS STLIGHT 879 OTHER DIRECT ASSIGNMENT ALLOCATORS 880 MISC. REVENUE MISC-RE 881 OTHER REVENUE OTH-REV 882 OTHER EXPENSE OTH-EXP 883 INCOME TAX AND REVENUE ALLOCATOR TAX-REV 884 KWH-TA KWH-TA 885 NULL REV. REQ. VALUE NONE 886 887 PRODUCTION ALLOCATORS 888 PRODUCTION - HYDRAULIC & OTHER INVESTMENT 889 L 21-23 PI-HO 890 TOTAL PRODUCTION PLANT INVESTMENT 891 L 25 PI-SHO 892 TRANSMISSION ALLOCATORS 893 350 LAND & LAND RIGHTS 894 L 31 T-350 895 352 STRUCTURES & IMPROVEMENTS DIRECT ASSIGNMENT ALLOCATORS DERIVED ALLOCATORS IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * 100% Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 127 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 848 *** TABLE 11 - FUNCTIONALIZATION ALLOCATORS ** 849 850 851 PRODUCTION DIRECT ASSIGNMENT ALLOCATORS 852 KWH GENERATION - BY STEAM UNITS KWH-S 853 KWH GENERATION - BY HYDRAULIC UNITS KWH-H 854 KWH GENERATION - BY OTHER UNITS KWH-O 855 KWH GENERATION - BY OTHER KWH-O 856 KWH GENERATION - ANNUAL KWH-T 857 555 PURCHASED POWER - CAPACIT PP-KW 858 555 PURCHASED POWER - ENERG PP-KWH 859 555 PURCHASED POWER - OTHER PP-OT 860 555 PURCHASED POWER - TOTAL PP-T 861 TOTAL COGEN & SMALL POWER PROD COGEN-E 862 PRODUCTION - STEAM INVESTMENT PI-S 863 PRODUCTION - HYDRAULIC INVESTMENT PI-H 864 PRODUCTION - OTHER INVESTMENT PI-O 865 PRODUCTION - OTHER INVESTMENT - Baseload PI-OS 866 TRANSMISSION DIRECT ASSIGNMENT ALLOCATORS 867 TRANSMISSION PLANT T-100 868 TRANSMISSION DIRECT ASSIGNMENT T-Direct 869 DISTRIBUTION DIRECT ASSIGNMENT ALLOCATORS 870 SUBSTATION CIAC CIAC 871 SERVICES SERVICE 872 METERS METER 873 METER READING M-READ 874 CUSTOMER RECORDS C-RECOR 875 CUSTOMER ASSISTANCE C-ASSIST 876 UNCOLLECTIBLE ACCOUNTS UAR 877 INSTALLATIONS ON CUSTOMER PREMISES CUSTINS 878 STREET LIGHTING SYSTEMS STLIGHT 879 OTHER DIRECT ASSIGNMENT ALLOCATORS 880 MISC. REVENUE MISC-RE 881 OTHER REVENUE OTH-REV 882 OTHER EXPENSE OTH-EXP 883 INCOME TAX AND REVENUE ALLOCATOR TAX-REV 884 KWH-TA KWH-TA 885 NULL REV. REQ. VALUE NONE 886 887 PRODUCTION ALLOCATORS 888 PRODUCTION - HYDRAULIC & OTHER INVESTMENT 889 L 21-23 PI-HO 890 TOTAL PRODUCTION PLANT INVESTMENT 891 L 25 PI-SHO 892 TRANSMISSION ALLOCATORS 893 350 LAND & LAND RIGHTS 894 L 31 T-350 895 352 STRUCTURES & IMPROVEMENTS DIRECT ASSIGNMENT ALLOCATORS DERIVED ALLOCATORS IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * 100% 100% 100% 100% Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 128 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 848 *** TABLE 11 - FUNCTIONALIZATION ALLOCATORS ** 849 850 851 PRODUCTION DIRECT ASSIGNMENT ALLOCATORS 852 KWH GENERATION - BY STEAM UNITS KWH-S 853 KWH GENERATION - BY HYDRAULIC UNITS KWH-H 854 KWH GENERATION - BY OTHER UNITS KWH-O 855 KWH GENERATION - BY OTHER KWH-O 856 KWH GENERATION - ANNUAL KWH-T 857 555 PURCHASED POWER - CAPACIT PP-KW 858 555 PURCHASED POWER - ENERG PP-KWH 859 555 PURCHASED POWER - OTHER PP-OT 860 555 PURCHASED POWER - TOTAL PP-T 861 TOTAL COGEN & SMALL POWER PROD COGEN-E 862 PRODUCTION - STEAM INVESTMENT PI-S 863 PRODUCTION - HYDRAULIC INVESTMENT PI-H 864 PRODUCTION - OTHER INVESTMENT PI-O 865 PRODUCTION - OTHER INVESTMENT - Baseload PI-OS 866 TRANSMISSION DIRECT ASSIGNMENT ALLOCATORS 867 TRANSMISSION PLANT T-100 868 TRANSMISSION DIRECT ASSIGNMENT T-Direct 869 DISTRIBUTION DIRECT ASSIGNMENT ALLOCATORS 870 SUBSTATION CIAC CIAC 871 SERVICES SERVICE 872 METERS METER 873 METER READING M-READ 874 CUSTOMER RECORDS C-RECOR 875 CUSTOMER ASSISTANCE C-ASSIST 876 UNCOLLECTIBLE ACCOUNTS UAR 877 INSTALLATIONS ON CUSTOMER PREMISES CUSTINS 878 STREET LIGHTING SYSTEMS STLIGHT 879 OTHER DIRECT ASSIGNMENT ALLOCATORS 880 MISC. REVENUE MISC-RE 881 OTHER REVENUE OTH-REV 882 OTHER EXPENSE OTH-EXP 883 INCOME TAX AND REVENUE ALLOCATOR TAX-REV 884 KWH-TA KWH-TA 885 NULL REV. REQ. VALUE NONE 886 887 PRODUCTION ALLOCATORS 888 PRODUCTION - HYDRAULIC & OTHER INVESTMENT 889 L 21-23 PI-HO 890 TOTAL PRODUCTION PLANT INVESTMENT 891 L 25 PI-SHO 892 TRANSMISSION ALLOCATORS 893 350 LAND & LAND RIGHTS 894 L 31 T-350 895 352 STRUCTURES & IMPROVEMENTS DIRECT ASSIGNMENT ALLOCATORS DERIVED ALLOCATORS IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * 100% 100% 100% 100% Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 129 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 848 *** TABLE 11 - FUNCTIONALIZATION ALLOCATORS ** 849 850 851 PRODUCTION DIRECT ASSIGNMENT ALLOCATORS 852 KWH GENERATION - BY STEAM UNITS KWH-S 853 KWH GENERATION - BY HYDRAULIC UNITS KWH-H 854 KWH GENERATION - BY OTHER UNITS KWH-O 855 KWH GENERATION - BY OTHER KWH-O 856 KWH GENERATION - ANNUAL KWH-T 857 555 PURCHASED POWER - CAPACIT PP-KW 858 555 PURCHASED POWER - ENERG PP-KWH 859 555 PURCHASED POWER - OTHER PP-OT 860 555 PURCHASED POWER - TOTAL PP-T 861 TOTAL COGEN & SMALL POWER PROD COGEN-E 862 PRODUCTION - STEAM INVESTMENT PI-S 863 PRODUCTION - HYDRAULIC INVESTMENT PI-H 864 PRODUCTION - OTHER INVESTMENT PI-O 865 PRODUCTION - OTHER INVESTMENT - Baseload PI-OS 866 TRANSMISSION DIRECT ASSIGNMENT ALLOCATORS 867 TRANSMISSION PLANT T-100 868 TRANSMISSION DIRECT ASSIGNMENT T-Direct 869 DISTRIBUTION DIRECT ASSIGNMENT ALLOCATORS 870 SUBSTATION CIAC CIAC 871 SERVICES SERVICE 872 METERS METER 873 METER READING M-READ 874 CUSTOMER RECORDS C-RECOR 875 CUSTOMER ASSISTANCE C-ASSIST 876 UNCOLLECTIBLE ACCOUNTS UAR 877 INSTALLATIONS ON CUSTOMER PREMISES CUSTINS 878 STREET LIGHTING SYSTEMS STLIGHT 879 OTHER DIRECT ASSIGNMENT ALLOCATORS 880 MISC. REVENUE MISC-RE 881 OTHER REVENUE OTH-REV 882 OTHER EXPENSE OTH-EXP 883 INCOME TAX AND REVENUE ALLOCATOR TAX-REV 884 KWH-TA KWH-TA 885 NULL REV. REQ. VALUE NONE 886 887 PRODUCTION ALLOCATORS 888 PRODUCTION - HYDRAULIC & OTHER INVESTMENT 889 L 21-23 PI-HO 890 TOTAL PRODUCTION PLANT INVESTMENT 891 L 25 PI-SHO 892 TRANSMISSION ALLOCATORS 893 350 LAND & LAND RIGHTS 894 L 31 T-350 895 352 STRUCTURES & IMPROVEMENTS DIRECT ASSIGNMENT ALLOCATORS DERIVED ALLOCATORS IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - 100% 100% 100% 100% 100% Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 130 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 896 L 36 T-352 100%100% 897 353 STATION EQUIPMENT 449,356,402 449,281,302 75,100 898 L 41 T-353 100%100% 0% 899 354 TOWERS & FIXTURES 227,483,716 227,483,716 900 L 47 T-354 100%100% 901 355 POLES & FIXTURES 226,404,073 226,404,073 902 L 52 T-355 100%100% 903 356 OVERHEAD CONDUCTORS & DEVICES 260,647,076 260,645,887 1,189 904 L 57 T-356 100%100% 0% 905 359 ROADS & TRAILS 374,346 374,346 906 L 63 T-359 100%100% 907 354-359 COMBINED TRANSMISSION ALLOCATOR 714,909,210 714,908,021 1,189 #### L 45-62 T-354-359 100%100% 0% 909 354 - 35 COMBINED TRANSMISSION ALLOCATOR 714,534,864 714,533,675 1,189 910 L 45-56 T-354-356 100%100% 0% 911 TOTAL TRANSMISSION PLANT 1,300,089,883 1,300,013,594 76,289 912 L 64 T-PLT 100%100% 0% 913 DISTRIBUTION ALLOCATORS 914 #360 LAND 9,056,163 915 (DERIVED FROM ACTUALS) D360 100% 916 #361 STRUCTURES & IMPROVEMENTS 64,320,867 917 (DERIVED FROM ACTUALS) D361 100% 918 #362 STATION EQUIPMENT 349,200,558 919 (DERIVED FROM ACTUALS) D362 100% 920 #360 NET PLANT 8,625,808 921 (DERIVED FROM ACTUALS) D360N 100% 922 #361 NET PLANT 56,873,252 923 (DERIVED FROM ACTUALS) D361N 100% 924 #362 NET PLANT 314,307,682 925 (DERIVED FROM ACTUALS) D362N 100% 926 #364 POLES, TOWERS, & FIXTURES 288,748,305 927 (DERIVED FROM ACTUALS) D364 100% 928 #365 OVERHEAD CONDUCTORS & DEVICES 146,384,826 929 (DERIVED FROM ACTUALS) D365 100% 930 #366 UNDERGROUND CONDUIT 51,958,505 931 (DERIVED FROM ACTUALS) D366 100% 932 #367 UNDERGROUND CONDUCTORS & DEVICES 313,429,461 933 (DERIVED FROM ACTUALS) D367 100% 934 #368 LINE TRANSFORMERS 666,063,582 935 (DERIVED FROM ACTUALS) D368 100% 936 TOTAL DISTRIBUTION PLANT 2,184,148,463 937 D3601 100% 938 TOTAL NET DISTRIBUTION PLANT 2,123,850,274 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 131 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 896 L 36 T-352 897 353 STATION EQUIPMENT 898 L 41 T-353 899 354 TOWERS & FIXTURES 900 L 47 T-354 901 355 POLES & FIXTURES 902 L 52 T-355 903 356 OVERHEAD CONDUCTORS & DEVICES 904 L 57 T-356 905 359 ROADS & TRAILS 906 L 63 T-359 907 354-359 COMBINED TRANSMISSION ALLOCATOR #### L 45-62 T-354-359 909 354 - 35 COMBINED TRANSMISSION ALLOCATOR 910 L 45-56 T-354-356 911 TOTAL TRANSMISSION PLANT 912 L 64 T-PLT 913 DISTRIBUTION ALLOCATORS 914 #360 LAND 915 (DERIVED FROM ACTUALS) D360 916 #361 STRUCTURES & IMPROVEMENTS 917 (DERIVED FROM ACTUALS) D361 918 #362 STATION EQUIPMENT 919 (DERIVED FROM ACTUALS) D362 920 #360 NET PLANT 921 (DERIVED FROM ACTUALS) D360N 922 #361 NET PLANT 923 (DERIVED FROM ACTUALS) D361N 924 #362 NET PLANT 925 (DERIVED FROM ACTUALS) D362N 926 #364 POLES, TOWERS, & FIXTURES 927 (DERIVED FROM ACTUALS) D364 928 #365 OVERHEAD CONDUCTORS & DEVICES 929 (DERIVED FROM ACTUALS) D365 930 #366 UNDERGROUND CONDUIT 931 (DERIVED FROM ACTUALS) D366 932 #367 UNDERGROUND CONDUCTORS & DEVICES 933 (DERIVED FROM ACTUALS) D367 934 #368 LINE TRANSFORMERS 935 (DERIVED FROM ACTUALS) D368 936 TOTAL DISTRIBUTION PLANT 937 D3601 938 TOTAL NET DISTRIBUTION PLANT IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * 9,056,112 51 100% 0% 60,478,466 3,842,401 94% 6% 334,200,746 14,999,812 96% 4% 8,625,757 51 100% 0% 56,337,171 536,081 99% 1% 310,836,279 3,471,403 99% 1% 180,815,162 89,614,532 2,012,844 63% 31% 1% 87,905,108 43,567,005 1,351,968 60% 30% 1% 24,711,812 12,247,521 6,296,318 48% 24% 12% 190,387,577 94,358,755 20,641,588 61% 30% 7% 109,222,060 54,131,986 30,269,678 315,883,541 16% 8% 5% 47% 420,494,493 19,610,440 513,577,215 254,536,076 32,093,767 115,525,520 57,256,069 32,016,611 334,113,916 19% 1% 24% 12% 1% 5% 3% 1% 15% 375,799,208 4,007,536 513,577,215 254,536,076 32,093,767 115,525,520 57,256,069 32,016,611 334,113,916 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 132 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 896 L 36 T-352 897 353 STATION EQUIPMENT 898 L 41 T-353 899 354 TOWERS & FIXTURES 900 L 47 T-354 901 355 POLES & FIXTURES 902 L 52 T-355 903 356 OVERHEAD CONDUCTORS & DEVICES 904 L 57 T-356 905 359 ROADS & TRAILS 906 L 63 T-359 907 354-359 COMBINED TRANSMISSION ALLOCATOR #### L 45-62 T-354-359 909 354 - 35 COMBINED TRANSMISSION ALLOCATOR 910 L 45-56 T-354-356 911 TOTAL TRANSMISSION PLANT 912 L 64 T-PLT 913 DISTRIBUTION ALLOCATORS 914 #360 LAND 915 (DERIVED FROM ACTUALS) D360 916 #361 STRUCTURES & IMPROVEMENTS 917 (DERIVED FROM ACTUALS) D361 918 #362 STATION EQUIPMENT 919 (DERIVED FROM ACTUALS) D362 920 #360 NET PLANT 921 (DERIVED FROM ACTUALS) D360N 922 #361 NET PLANT 923 (DERIVED FROM ACTUALS) D361N 924 #362 NET PLANT 925 (DERIVED FROM ACTUALS) D362N 926 #364 POLES, TOWERS, & FIXTURES 927 (DERIVED FROM ACTUALS) D364 928 #365 OVERHEAD CONDUCTORS & DEVICES 929 (DERIVED FROM ACTUALS) D365 930 #366 UNDERGROUND CONDUIT 931 (DERIVED FROM ACTUALS) D366 932 #367 UNDERGROUND CONDUCTORS & DEVICES 933 (DERIVED FROM ACTUALS) D367 934 #368 LINE TRANSFORMERS 935 (DERIVED FROM ACTUALS) D368 936 TOTAL DISTRIBUTION PLANT 937 D3601 938 TOTAL NET DISTRIBUTION PLANT IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * 10,902,390 5,403,377 4% 2% 9,067,008 4,493,736 6% 3% 5,818,917 2,883,937 11% 6% 5,376,749 2,664,792 2% 1% 156,556,316 24% 165,591,546 32,913,074 16,312,181 66,979,720 112,739,963 6,061,607 4,326,265 8% 2% 1% 3% 5% 0% 0% 165,591,546 32,913,074 16,312,181 66,979,720 112,739,963 6,061,607 4,326,265 Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 133 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 896 L 36 T-352 897 353 STATION EQUIPMENT 898 L 41 T-353 899 354 TOWERS & FIXTURES 900 L 47 T-354 901 355 POLES & FIXTURES 902 L 52 T-355 903 356 OVERHEAD CONDUCTORS & DEVICES 904 L 57 T-356 905 359 ROADS & TRAILS 906 L 63 T-359 907 354-359 COMBINED TRANSMISSION ALLOCATOR #### L 45-62 T-354-359 909 354 - 35 COMBINED TRANSMISSION ALLOCATOR 910 L 45-56 T-354-356 911 TOTAL TRANSMISSION PLANT 912 L 64 T-PLT 913 DISTRIBUTION ALLOCATORS 914 #360 LAND 915 (DERIVED FROM ACTUALS) D360 916 #361 STRUCTURES & IMPROVEMENTS 917 (DERIVED FROM ACTUALS) D361 918 #362 STATION EQUIPMENT 919 (DERIVED FROM ACTUALS) D362 920 #360 NET PLANT 921 (DERIVED FROM ACTUALS) D360N 922 #361 NET PLANT 923 (DERIVED FROM ACTUALS) D361N 924 #362 NET PLANT 925 (DERIVED FROM ACTUALS) D362N 926 #364 POLES, TOWERS, & FIXTURES 927 (DERIVED FROM ACTUALS) D364 928 #365 OVERHEAD CONDUCTORS & DEVICES 929 (DERIVED FROM ACTUALS) D365 930 #366 UNDERGROUND CONDUIT 931 (DERIVED FROM ACTUALS) D366 932 #367 UNDERGROUND CONDUCTORS & DEVICES 933 (DERIVED FROM ACTUALS) D367 934 #368 LINE TRANSFORMERS 935 (DERIVED FROM ACTUALS) D368 936 TOTAL DISTRIBUTION PLANT 937 D3601 938 TOTAL NET DISTRIBUTION PLANT IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 134 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 896 L 36 T-352 897 353 STATION EQUIPMENT 898 L 41 T-353 899 354 TOWERS & FIXTURES 900 L 47 T-354 901 355 POLES & FIXTURES 902 L 52 T-355 903 356 OVERHEAD CONDUCTORS & DEVICES 904 L 57 T-356 905 359 ROADS & TRAILS 906 L 63 T-359 907 354-359 COMBINED TRANSMISSION ALLOCATOR #### L 45-62 T-354-359 909 354 - 35 COMBINED TRANSMISSION ALLOCATOR 910 L 45-56 T-354-356 911 TOTAL TRANSMISSION PLANT 912 L 64 T-PLT 913 DISTRIBUTION ALLOCATORS 914 #360 LAND 915 (DERIVED FROM ACTUALS) D360 916 #361 STRUCTURES & IMPROVEMENTS 917 (DERIVED FROM ACTUALS) D361 918 #362 STATION EQUIPMENT 919 (DERIVED FROM ACTUALS) D362 920 #360 NET PLANT 921 (DERIVED FROM ACTUALS) D360N 922 #361 NET PLANT 923 (DERIVED FROM ACTUALS) D361N 924 #362 NET PLANT 925 (DERIVED FROM ACTUALS) D362N 926 #364 POLES, TOWERS, & FIXTURES 927 (DERIVED FROM ACTUALS) D364 928 #365 OVERHEAD CONDUCTORS & DEVICES 929 (DERIVED FROM ACTUALS) D365 930 #366 UNDERGROUND CONDUIT 931 (DERIVED FROM ACTUALS) D366 932 #367 UNDERGROUND CONDUCTORS & DEVICES 933 (DERIVED FROM ACTUALS) D367 934 #368 LINE TRANSFORMERS 935 (DERIVED FROM ACTUALS) D368 936 TOTAL DISTRIBUTION PLANT 937 D3601 938 TOTAL NET DISTRIBUTION PLANT IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 135 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 939 D3602N 100% 940 DARK FIBER PROJECT REVENUE (ACCT 454) 2,184,148,463 941 (DERIVED FROM ACTUALS) D-FIBER 100% 942 MERCHANDISING REVENUE 1,631,303,567 641 943 (DERIVED FROM ACTUALS) M-REV 100% 944 MERCHANDISING EXPENSE 1,631,303,567 10,097 945 (DERIVED FROM ACTUALS) M-EXP 100% 946 CUSTOMER ADVANCES FOR CONSTRUCTION 63,977,523 947 CUSTADV 100% 948 364-365 COMBINED DISTRIBUTION ALLOCATOR 461,598,814 949 L 87-88 D-364-365 100% 950 366-367 COMBINED DISTRIBUTION ALLOCATOR 387,833,499 951 L 89-90 D-366-367 100% 952 902-904 COMBINED DISTRIBUTION ALLOCATOR 23,220,761 953 L 500-502 D-902-904 100% 954 908 COMBINED DISTRIBUTION ALLOCATOR 11,377,854 1,673,332 955 507-509 D-908 100% 15% 956 908-909 COMBINED DISTRIBUTION ALLOCATOR 11,663,442 1,673,332 957 L 507-511 D-908-909 100% 14% 958 PLANT-RELATED ALLOCATORS 959 "P112P' NET TOTAL PLANT PLUS INTANGIBLE 6,119,224,374 2,123,568,725 200,116,177 1,438,662,020 84,425 960 P112P 100% 35% 3% 24% 0% 961 "P111P" NET TOTAL PLANT LESS INTANGIBLE 6,018,437,105 2,088,933,575 196,852,306 1,415,197,616 83,048 962 P111P 100% 35% 3% 24% 0% 963 "P101P" TOTAL PLANT LESS INTANGIBLE 6,078,735,296 2,088,933,575 196,852,306 1,415,197,616 83,048 964 P101P 100% 34% 3% 23% 0% 965 "P110P" TOTAL PLANT INCLUDING INTANGIBLE 6,179,522,565 2,123,568,725 200,116,177 1,438,662,020 84,425 966 P110P 100% 34% 3% 23% 0% 967 "PTD" PLANT 5,583,982,355 1,918,913,664 180,830,345 1,300,013,594 76,289 968 P-PTD 100% 34% 3% 23% 0% 969 P110P - LESS STEAM PRODUCTION 5,912,422,670 1,856,468,830 200,116,177 1,438,662,020 84,425 970 P110P-L2 100% 31% 3% 24% 0% 971 TOTAL GENERAL PLANT 494,752,941 170,019,910 16,021,961 115,184,022 6,759 972 GEN-PLT 100% 34% 3% 23% 0% 973 O&M /LABOR ALLOCATORS 974 O&M PROD,TRANS,DIST,CA & CI (LABOR ONLY) 102,369,774 44,066,967 1,777,391 11,965,536 1,067 975 LABOR 100% 43% 2% 12% 0% 976 O&M PROD,TRANS,DIST,CA & CI (TOTAL O&M) 706,073,060 61,962,979 13,064,291 490,961,573 27,009,100 1,679 977 O&M-M 100% 9% 2% 70% 4% 0% 978 O&M PROD,ADMIN & GENERAL ONLY (TOTAL O&M) 182,750,903 76,173,715 3,452,075 1,855,842 21,769,057 1,842 979 O&M-AG 100% 42% 2% 1% 12% 0% 980 TOTAL OPERATING EXPENSES 888,823,963 138,136,693 16,516,367 492,817,416 48,778,156 3,521 981 L 560 O&M-T 100% 16% 2% 55% 5% 0% 982 SUPERVISION 500 - 501-507 7,813,593 7,813,593 983 L 688-698 L-500 100% 100% Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 136 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 939 D3602N 940 DARK FIBER PROJECT REVENUE (ACCT 454) 941 (DERIVED FROM ACTUALS) D-FIBER 942 MERCHANDISING REVENUE 943 (DERIVED FROM ACTUALS) M-REV 944 MERCHANDISING EXPENSE 945 (DERIVED FROM ACTUALS) M-EXP 946 CUSTOMER ADVANCES FOR CONSTRUCTION 947 CUSTADV 948 364-365 COMBINED DISTRIBUTION ALLOCATOR 949 L 87-88 D-364-365 950 366-367 COMBINED DISTRIBUTION ALLOCATOR 951 L 89-90 D-366-367 952 902-904 COMBINED DISTRIBUTION ALLOCATOR 953 L 500-502 D-902-904 954 908 COMBINED DISTRIBUTION ALLOCATOR 955 507-509 D-908 956 908-909 COMBINED DISTRIBUTION ALLOCATOR 957 L 507-511 D-908-909 958 PLANT-RELATED ALLOCATORS 959 "P112P' NET TOTAL PLANT PLUS INTANGIBLE 960 P112P 961 "P111P" NET TOTAL PLANT LESS INTANGIBLE 962 P111P 963 "P101P" TOTAL PLANT LESS INTANGIBLE 964 P101P 965 "P110P" TOTAL PLANT INCLUDING INTANGIBLE 966 P110P 967 "PTD" PLANT 968 P-PTD 969 P110P - LESS STEAM PRODUCTION 970 P110P-L2 971 TOTAL GENERAL PLANT 972 GEN-PLT 973 O&M /LABOR ALLOCATORS 974 O&M PROD,TRANS,DIST,CA & CI (LABOR ONLY) 975 LABOR 976 O&M PROD,TRANS,DIST,CA & CI (TOTAL O&M) 977 O&M-M 978 O&M PROD,ADMIN & GENERAL ONLY (TOTAL O&M) 979 O&M-AG 980 TOTAL OPERATING EXPENSES 981 L 560 O&M-T 982 SUPERVISION 500 - 501-507 983 L 688-698 L-500 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * 18% 0% 24% 12% 2% 5% 3% 2% 16% 420,494,493 19,610,440 513,577,215 254,536,076 32,093,767 115,525,520 57,256,069 32,016,611 334,113,916 19% 1% 24% 12% 1% 5% 3% 1% 15% 513,577,215 254,536,076 32,093,767 115,525,520 57,256,069 32,016,611 334,113,916 31% 16% 2% 7% 4% 2% 20% 513,577,215 254,536,076 32,093,767 115,525,520 57,256,069 32,016,611 334,113,916 31% 16% 2% 7% 4% 2% 20% 27,550,407 13,654,368 1,112,215 551,229 3,422,755 43% 21% 2% 1% 5% 285,111,328 141,305,176 3,565,330 62% 31% 1% 228,465,887 113,230,900 28,528,437 59% 29% 7% 420,645,584 6,099,019 568,351,006 281,682,735 35,516,616 127,846,492 63,362,516 35,431,232 369,747,673 7% 0% 9% 5% 1% 2% 1% 1% 6% 413,055,930 5,745,063 559,081,269 277,088,524 34,937,344 125,761,331 62,329,081 34,853,352 363,717,133 7% 0% 9% 5% 1% 2% 1% 1% 6% 457,751,217 21,347,968 559,081,269 277,088,524 34,937,344 125,761,331 62,329,081 34,853,352 363,717,133 8% 0% 9% 5% 1% 2% 1% 1% 6% 465,340,871 21,701,923 568,351,006 281,682,735 35,516,616 127,846,492 63,362,516 35,431,232 369,747,673 8% 0% 9% 5% 1% 2% 1% 1% 6% 420,494,493 19,610,440 513,577,215 254,536,076 32,093,767 115,525,520 57,256,069 32,016,611 334,113,916 8% 0% 9% 5% 1% 2% 1% 1% 6% 465,340,871 21,701,923 568,351,006 281,682,735 35,516,616 127,846,492 63,362,516 35,431,232 369,747,673 8% 0% 10% 5% 1% 2% 1% 1% 6% 37,256,724 1,737,527 45,504,054 22,552,448 2,843,577 10,235,811 5,073,012 2,836,741 29,603,217 8% 0% 9% 5% 1% 2% 1% 1% 6% 5,058,195 229,713 8,381,525 4,154,001 322,661 425,031 210,651 117,793 1,229,242 5% 0% 8% 4% 0% 0% 0% 0% 1% 9,045,933 410,661 31,656,049 15,689,182 968,634 744,474 368,972 206,323 2,153,110 1% 0% 4% 2% 0% 0% 0% 0% 0% 8,865,565 403,787 15,696,041 7,779,178 666,284 1,246,451 617,758 345,440 3,604,888 5% 0% 9% 4% 0% 1% 0% 0% 2% 17,911,499 814,448 47,352,090 23,468,360 1,634,918 1,990,925 986,730 551,763 5,757,998 2% 0% 5% 3% 0% 0% 0% 0% 1% Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 137 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 939 D3602N 940 DARK FIBER PROJECT REVENUE (ACCT 454) 941 (DERIVED FROM ACTUALS) D-FIBER 942 MERCHANDISING REVENUE 943 (DERIVED FROM ACTUALS) M-REV 944 MERCHANDISING EXPENSE 945 (DERIVED FROM ACTUALS) M-EXP 946 CUSTOMER ADVANCES FOR CONSTRUCTION 947 CUSTADV 948 364-365 COMBINED DISTRIBUTION ALLOCATOR 949 L 87-88 D-364-365 950 366-367 COMBINED DISTRIBUTION ALLOCATOR 951 L 89-90 D-366-367 952 902-904 COMBINED DISTRIBUTION ALLOCATOR 953 L 500-502 D-902-904 954 908 COMBINED DISTRIBUTION ALLOCATOR 955 507-509 D-908 956 908-909 COMBINED DISTRIBUTION ALLOCATOR 957 L 507-511 D-908-909 958 PLANT-RELATED ALLOCATORS 959 "P112P' NET TOTAL PLANT PLUS INTANGIBLE 960 P112P 961 "P111P" NET TOTAL PLANT LESS INTANGIBLE 962 P111P 963 "P101P" TOTAL PLANT LESS INTANGIBLE 964 P101P 965 "P110P" TOTAL PLANT INCLUDING INTANGIBLE 966 P110P 967 "PTD" PLANT 968 P-PTD 969 P110P - LESS STEAM PRODUCTION 970 P110P-L2 971 TOTAL GENERAL PLANT 972 GEN-PLT 973 O&M /LABOR ALLOCATORS 974 O&M PROD,TRANS,DIST,CA & CI (LABOR ONLY) 975 LABOR 976 O&M PROD,TRANS,DIST,CA & CI (TOTAL O&M) 977 O&M-M 978 O&M PROD,ADMIN & GENERAL ONLY (TOTAL O&M) 979 O&M-AG 980 TOTAL OPERATING EXPENSES 981 L 560 O&M-T 982 SUPERVISION 500 - 501-507 983 L 688-698 L-500 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * 8% 2% 1% 3% 5% 0% 0% 165,591,546 32,913,074 16,312,181 66,979,720 112,739,963 6,061,607 4,326,265 8% 2% 1% 3% 5% 0% 0% 165,591,546 32,913,074 16,312,181 66,979,720 6,061,607 4,326,265 10% 2% 1% 4% 0% 0% 165,591,546 32,913,074 16,312,181 66,979,720 6,061,607 4,326,265 10% 2% 1% 4% 0% 0% 1,696,365 4,644,708 2,301,982 8,940,078 6,113 88,201 9,103 3% 7% 4% 14% 0% 0% 0% 21,139,799 10,477,181 5% 2% 11,773,274 5,835,000 3% 2% 183,252,136 36,423,303 18,051,900 74,123,210 124,763,852 6,708,087 4,787,668 3% 1% 0% 1% 2% 0% 0% 180,263,316 35,829,243 17,757,476 72,914,269 122,728,968 6,598,679 4,709,581 3% 1% 0% 1% 2% 0% 0% 180,263,316 35,829,243 17,757,476 72,914,269 122,728,968 6,598,679 4,709,581 3% 1% 0% 1% 2% 0% 0% 183,252,136 36,423,303 18,051,900 74,123,210 124,763,852 6,708,087 4,787,668 3% 1% 0% 1% 2% 0% 0% 165,591,546 32,913,074 16,312,181 66,979,720 112,739,963 6,061,607 4,326,265 3% 1% 0% 1% 2% 0% 0% 183,252,136 36,423,303 18,051,900 74,123,210 124,763,852 6,708,087 4,787,668 3% 1% 0% 1% 2% 0% 0% 14,671,770 2,916,170 1,445,295 5,934,548 9,989,005 537,072 383,316 3% 1% 0% 1% 2% 0% 0% 609,230 577,611 286,272 244,107 5,781,951 163,872 815,779 1% 1% 0% 0% 6% 0% 1% 1,067,112 2,231,889 1,106,155 422,794 9,406,745 267,994 1,596,609 0% 0% 0% 0% 1% 0% 0% 1,786,633 1,069,204 529,913 719,043 9,299,810 286,846 1,297,827 1% 1% 0% 0% 5% 0% 1% 2,853,745 3,301,093 1,636,068 1,141,837 18,706,555 554,840 2,894,436 0% 0% 0% 0% 2% 0% 0% Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 138 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 939 D3602N 940 DARK FIBER PROJECT REVENUE (ACCT 454) 941 (DERIVED FROM ACTUALS) D-FIBER 942 MERCHANDISING REVENUE 943 (DERIVED FROM ACTUALS) M-REV 944 MERCHANDISING EXPENSE 945 (DERIVED FROM ACTUALS) M-EXP 946 CUSTOMER ADVANCES FOR CONSTRUCTION 947 CUSTADV 948 364-365 COMBINED DISTRIBUTION ALLOCATOR 949 L 87-88 D-364-365 950 366-367 COMBINED DISTRIBUTION ALLOCATOR 951 L 89-90 D-366-367 952 902-904 COMBINED DISTRIBUTION ALLOCATOR 953 L 500-502 D-902-904 954 908 COMBINED DISTRIBUTION ALLOCATOR 955 507-509 D-908 956 908-909 COMBINED DISTRIBUTION ALLOCATOR 957 L 507-511 D-908-909 958 PLANT-RELATED ALLOCATORS 959 "P112P' NET TOTAL PLANT PLUS INTANGIBLE 960 P112P 961 "P111P" NET TOTAL PLANT LESS INTANGIBLE 962 P111P 963 "P101P" TOTAL PLANT LESS INTANGIBLE 964 P101P 965 "P110P" TOTAL PLANT INCLUDING INTANGIBLE 966 P110P 967 "PTD" PLANT 968 P-PTD 969 P110P - LESS STEAM PRODUCTION 970 P110P-L2 971 TOTAL GENERAL PLANT 972 GEN-PLT 973 O&M /LABOR ALLOCATORS 974 O&M PROD,TRANS,DIST,CA & CI (LABOR ONLY) 975 LABOR 976 O&M PROD,TRANS,DIST,CA & CI (TOTAL O&M) 977 O&M-M 978 O&M PROD,ADMIN & GENERAL ONLY (TOTAL O&M) 979 O&M-AG 980 TOTAL OPERATING EXPENSES 981 L 560 O&M-T 982 SUPERVISION 500 - 501-507 983 L 688-698 L-500 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * 1,768,247 16,063,116 5,389,398 8% 69% 23% 9,704,522 85% 9,990,110 86% 1,161,976 9,959,064 4,830,138 1% 10% 5% 1,863,895 16,882,788 5,388,730 11,595,389 0% 2% 1% 2% 1,817,571 15,578,028 7,555,331 1% 9% 4% 3,681,466 32,460,816 5,388,730 19,150,720 0% 4% 1% 2% Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 139 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 939 D3602N 940 DARK FIBER PROJECT REVENUE (ACCT 454) 941 (DERIVED FROM ACTUALS) D-FIBER 942 MERCHANDISING REVENUE 943 (DERIVED FROM ACTUALS) M-REV 944 MERCHANDISING EXPENSE 945 (DERIVED FROM ACTUALS) M-EXP 946 CUSTOMER ADVANCES FOR CONSTRUCTION 947 CUSTADV 948 364-365 COMBINED DISTRIBUTION ALLOCATOR 949 L 87-88 D-364-365 950 366-367 COMBINED DISTRIBUTION ALLOCATOR 951 L 89-90 D-366-367 952 902-904 COMBINED DISTRIBUTION ALLOCATOR 953 L 500-502 D-902-904 954 908 COMBINED DISTRIBUTION ALLOCATOR 955 507-509 D-908 956 908-909 COMBINED DISTRIBUTION ALLOCATOR 957 L 507-511 D-908-909 958 PLANT-RELATED ALLOCATORS 959 "P112P' NET TOTAL PLANT PLUS INTANGIBLE 960 P112P 961 "P111P" NET TOTAL PLANT LESS INTANGIBLE 962 P111P 963 "P101P" TOTAL PLANT LESS INTANGIBLE 964 P101P 965 "P110P" TOTAL PLANT INCLUDING INTANGIBLE 966 P110P 967 "PTD" PLANT 968 P-PTD 969 P110P - LESS STEAM PRODUCTION 970 P110P-L2 971 TOTAL GENERAL PLANT 972 GEN-PLT 973 O&M /LABOR ALLOCATORS 974 O&M PROD,TRANS,DIST,CA & CI (LABOR ONLY) 975 LABOR 976 O&M PROD,TRANS,DIST,CA & CI (TOTAL O&M) 977 O&M-M 978 O&M PROD,ADMIN & GENERAL ONLY (TOTAL O&M) 979 O&M-AG 980 TOTAL OPERATING EXPENSES 981 L 560 O&M-T 982 SUPERVISION 500 - 501-507 983 L 688-698 L-500 IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - 332,773 0% 332,773 0% Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 140 OF 145 1 IDAHO POWER COMPAN 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION 3 CLASS COST OF SERVICE STUD 4 FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 5 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS 6 (A) (B) (C) (CC) (CCC) (D) (E) (F) (G) (H) 7 TOTALS 8 LLOCATO DEMAND ENERG DEMAND DEMAND DEMAND DEMAND 9 Base-load Peak POWER SUP TRANS SUBTRANS DIRECT - - - - - - - - TRANSMISSION FUNCTION - - - - - - - - * * PRODUCTION FUNCTION * * 984 SUPERVISION 510 - 511-514 7,624,615 985 L 703-712 L-510 100% 100% 986 SUPERVISION 535 - 536-540 11,546,063 11,546,063 987 L 718-722 L-535 100% 100% 988 SUPERVISION 541 - 542-545 4,599,921 4,599,921 989 L 725-728 L-541 100% 100% 990 SUPERVISION 546 - 548-550 3,458,462 2,426,504 1,031,958 991 L 735-737 L-546 100% 70% 30% 992 SUPERVISION 551 - 552-554 758,056 531,862 226,194 993 L 741-743 L-551 100% 70% 30% 994 SUPERVISION 560 - 561-567 5,146,941 5,146,466 475 995 L 755-760 L-560 100%100% 0% 996 SUPERVISION 568 - 569-573 4,449,063 4,448,688 375 997 L 763-766 L-568 100%100% 0% 998 SUPERVISION 580 - 581-589 17,149,398 999 L 773-781 L-580 100% 1000 SUPERVISION 590 - 591-598 8,594,783 1001 L 785-792 L-590 100% 1002 SUPERVISION 901- 902-905 10,510,395 1003 L 798-801 L-901 100% 1004 SUPERVISION 907 - 908-912 4,856,231 714,202 1005 L 806-809 L-907 100% 15% 1006 DEFERRED TAX ALLOCATOR 1007 DIT 190 & 283 (13,118,782) (3,930,900) (370,431) (2,663,082) (156) 1008 L 189,190,193 DIT 100% 30% 3% 20% 0% Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 141 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 984 SUPERVISION 510 - 511-514 985 L 703-712 L-510 986 SUPERVISION 535 - 536-540 987 L 718-722 L-535 988 SUPERVISION 541 - 542-545 989 L 725-728 L-541 990 SUPERVISION 546 - 548-550 991 L 735-737 L-546 992 SUPERVISION 551 - 552-554 993 L 741-743 L-551 994 SUPERVISION 560 - 561-567 995 L 755-760 L-560 996 SUPERVISION 568 - 569-573 997 L 763-766 L-568 998 SUPERVISION 580 - 581-589 999 L 773-781 L-580 1000 SUPERVISION 590 - 591-598 1001 L 785-792 L-590 1002 SUPERVISION 901- 902-905 1003 L 798-801 L-901 1004 SUPERVISION 907 - 908-912 1005 L 806-809 L-907 1006 DEFERRED TAX ALLOCATOR 1007 DIT 190 & 283 1008 L 189,190,193 DIT IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (I) (J) (K) (L) (M) (N) (O) (P) (Q) (R) SUBSTATION SUBSTATION SUBSTATION PRI LINES PRI LINES SEC LINES LINE TRANS LINE TRANS LINE TRANS LINE TRANS GENERAL DIRECT CIAC DEMAND CUSTOMER DIRECT PRI DMD PRI CUST PRI DIRECT SEC DMD * * * * * * * * * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * * * * * * * * * * * 2,197,947 100,932 4,457,775 2,209,336 224,684 357,492 177,178 99,075 1,033,910 13% 1% 26% 13% 1% 2% 1% 1% 6% 2,491,814 111,865 3,178,451 1,575,285 60,516 8,026 3,978 2,224 23,213 29% 1% 37% 18% 1% 0% 0% 0% 0% (777,278) (10,811) (1,824,369) (904,183) (65,744) (267,832) (132,742) (65,586) (780,381) 6% 0% 14% 7% 1% 2% 1% 0% 6% Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 142 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 984 SUPERVISION 510 - 511-514 985 L 703-712 L-510 986 SUPERVISION 535 - 536-540 987 L 718-722 L-535 988 SUPERVISION 541 - 542-545 989 L 725-728 L-541 990 SUPERVISION 546 - 548-550 991 L 735-737 L-546 992 SUPERVISION 551 - 552-554 993 L 741-743 L-551 994 SUPERVISION 560 - 561-567 995 L 755-760 L-560 996 SUPERVISION 568 - 569-573 997 L 763-766 L-568 998 SUPERVISION 580 - 581-589 999 L 773-781 L-580 1000 SUPERVISION 590 - 591-598 1001 L 785-792 L-590 1002 SUPERVISION 901- 902-905 1003 L 798-801 L-901 1004 SUPERVISION 907 - 908-912 1005 L 806-809 L-907 1006 DEFERRED TAX ALLOCATOR 1007 DIT 190 & 283 1008 L 189,190,193 DIT IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (S) (T) (U) (V) (W) (X) (Y) LINE TRANS SEC LINES SEC LINES SERVICES METERS STREET INSTALLATION SEC CUST DEMAND CUSTOMER LIGHTS CUST PREM * * * * * * * * * * * * * * DISTRIBUTION FUNCTION * * * * * * * * * * * * * * 512,420 296,525 146,962 207,268 4,390,347 38,309 699,239 3% 2% 1% 1% 26% 0% 4% 11,504 231,489 114,729 2,336 660,141 119,062 151 0% 3% 1% 0% 8% 1% 0% (386,768) (197,625) (97,946) (387,820) (231,119) (14,890) (9,118) 3% 2% 1% 3% 2% 0% 0% Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 143 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 984 SUPERVISION 510 - 511-514 985 L 703-712 L-510 986 SUPERVISION 535 - 536-540 987 L 718-722 L-535 988 SUPERVISION 541 - 542-545 989 L 725-728 L-541 990 SUPERVISION 546 - 548-550 991 L 735-737 L-546 992 SUPERVISION 551 - 552-554 993 L 741-743 L-551 994 SUPERVISION 560 - 561-567 995 L 755-760 L-560 996 SUPERVISION 568 - 569-573 997 L 763-766 L-568 998 SUPERVISION 580 - 581-589 999 L 773-781 L-580 1000 SUPERVISION 590 - 591-598 1001 L 785-792 L-590 1002 SUPERVISION 901- 902-905 1003 L 798-801 L-901 1004 SUPERVISION 907 - 908-912 1005 L 806-809 L-907 1006 DEFERRED TAX ALLOCATOR 1007 DIT 190 & 283 1008 L 189,190,193 DIT IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUDY FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (Z) (AA) (AB) (AC) (AD) (AE) (AF) (AG) METER CUSTOMER UNCOLLECT CUSTOMER READING RECORDS CCOUNTS OTHER SSISTANCE DEMONSTR DVERTISING OTHER - - - CUSTOMER ACCOUNTING FUNCTION - - - * * * * * CUSTOMER INFORMATION FUNCTION * * * * 1,098,173 9,412,221 10% 90% 4,142,029 85% Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 144 OF 145 1 2 3 4 5 6 (A) 7 8 LLOCATO 9 984 SUPERVISION 510 - 511-514 985 L 703-712 L-510 986 SUPERVISION 535 - 536-540 987 L 718-722 L-535 988 SUPERVISION 541 - 542-545 989 L 725-728 L-541 990 SUPERVISION 546 - 548-550 991 L 735-737 L-546 992 SUPERVISION 551 - 552-554 993 L 741-743 L-551 994 SUPERVISION 560 - 561-567 995 L 755-760 L-560 996 SUPERVISION 568 - 569-573 997 L 763-766 L-568 998 SUPERVISION 580 - 581-589 999 L 773-781 L-580 1000 SUPERVISION 590 - 591-598 1001 L 785-792 L-590 1002 SUPERVISION 901- 902-905 1003 L 798-801 L-901 1004 SUPERVISION 907 - 908-912 1005 L 806-809 L-907 1006 DEFERRED TAX ALLOCATOR 1007 DIT 190 & 283 1008 L 189,190,193 DIT IDAHO POWER COMPAN BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CLASS COST OF SERVICE STUD FOR THE TWELVE MONTHS ENDING DECEMBER 31, 2023 FUNCTIONALIZATION AND CLASSIFICATION OF COSTS (AH) (AI) (AJ) (AK) (AL) (AM) INC TAXES & REVENUES DEMAND ENERG CUSTOMER REVENUE OTHER TRANSFER - - - - - - - - - - MISCELLANEOUS - - - - - - - - - - Exhibit No.37 Case No. IPC-E-23-11 P. Goralski, IPC PAGE 145 OF 145 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CASE NO. IPC-E-23-11 IDAHO POWER COMPANY GORALSKI, DI TESTIMONY EXHIBIT NO. 38 1 IDAHO POWER COMPANY 2 3CP/12CP CLASS COST OF SERVICE STUDY 3 *** RATE BASE ***TWELVE MONTHS ENDING DECEMBER 31, 2023 4 SUMMARY OF FUNCTIONALIZED COSTS 5 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) (K) (L) (M) 6 FUNCTION PLANT DEPRECIATION AMORTIZATION SUBSTATION NET CUSTOMER ACCUM DEF ACQUISITION WORKING DEFERRED SUBSIDIARY LNT HLD FO TOTAL 7 IN SERVICE RESERVE RESERVE CIAC PLANT ADV CONST INC TAXES ADJUSTMENT CAPITAL PROGRAMS RATE BASE FUTURE USE RATE BASE 8 PRODUCTION 9 DEMAND - Base-load 2,123,568,725 775,552,890 28,321,108 0 1,319,694,727 0 127,470,124 0 15,553,944 19,207,519 0 0 1,226,986,067 10 DEMAND - Peak 200,116,177 69,317,877 583,298 0 130,215,002 0 12,012,248 0 1,465,738 6,539,110 0 0 126,207,603 11 DEMAND - Not in Use 0 0 0 0 0 0 0 0 0 0 0 0 0 12 ENERGY - POWER SUPPLY 0 0 0 0 0 0 0 0 23,609,967 0 29,980,646 0 53,590,613 13 ENERGY - Summer 0 0 0 0 0 0 0 0 0 0 0 0 0 14 ENERGY - Non-Summer 0 0 0 0 0 0 0 0 0 0 0 0 0 15 0 0 0 0 0 0 0 0 0 0 0 0 0 16 TRANSMISSION 0 0 0 0 0 0 0 0 0 0 0 0 0 17 DEMAND - POWER SUPPLY 0 0 0 0 0 0 0 0 0 0 0 0 0 18 DEMAND - TRANSMISSION 1,438,662,020 433,115,447 4,193,406 0 1,001,353,167 0 86,357,660 628,247 15,047,187 3,273,907 0 2,640,221 936,585,068 19 DEMAND - SUBTRANSMISSION 0 0 0 0 0 0 0 0 0 0 0 0 0 20 DEMAND - DIRECT 84,425 21,968 246 0 62,211 0 5,068 0 883 192 0 0 58,219 21 0 0 0 0 0 0 0 0 0 0 0 0 0 22 DISTRIBUTION 0 0 0 0 0 0 0 0 0 0 0 0 0 23 SUBSTATIONS - GENERAL 465,340,871 94,499,470 1,356,374 0 369,485,027 0 25,205,345 0 10,475,525 1,058,958 0 5,316,573 361,130,739 24 SUBSTATIONS - DIRECT 21,701,923 1,380,982 63,257 0 20,257,685 0 350,573 0 488,543 49,386 0 30 20,445,071 25 LINES - PRIMARY DEMAND 568,351,006 199,786,215 1,656,627 0 366,908,163 3,181,235 33,343,743 0 12,794,439 1,293,374 0 0 344,470,998 26 LINES - PRIMARY CUSTOMER 281,682,735 99,016,852 821,048 0 181,844,835 1,576,665 16,525,627 0 6,341,104 641,014 0 0 170,724,661 27 LINES - SECONDARY DIRECT 35,516,616 11,284,088 103,524 0 24,129,005 0 2,131,934 0 799,533 80,824 0 0 22,877,428 28 LINE TRANS - PRIMARY DEMAND 127,846,492 33,700,274 372,646 0 93,773,572 128,427 7,642,983 0 2,878,018 290,935 0 0 89,171,115 29 LINE TRANS - PRIMARY CUST 63,362,516 16,702,329 184,689 0 46,475,498 63,650 3,787,970 0 1,426,386 144,192 0 0 44,194,456 30 LINE TRANS - SECOND DIRECT 35,431,232 9,339,656 103,275 0 25,988,301 0 2,126,808 0 797,611 80,629 0 0 24,739,733 31 LINE TRANS - SECOND DEMAND 369,747,673 97,465,309 1,077,739 0 271,204,625 395,224 22,098,663 0 8,323,578 841,420 0 0 257,875,737 32 LINE TRANS - SECOND CUSTOME 183,252,136 48,305,175 534,143 0 134,412,819 195,879 10,952,407 0 4,125,282 417,020 0 0 127,806,834 33 LINES - SECONDARY DEMAND 36,423,303 12,989,768 106,166 0 23,327,369 536,323 2,056,156 0 819,944 82,887 0 0 21,637,720 34 LINES - SECONDARY CUSTOMER 18,051,900 6,437,911 52,618 0 11,561,371 265,809 1,019,060 0 406,376 41,080 0 0 10,723,958 35 SERVICES 74,123,210 45,312,003 216,054 0 28,595,152 1,032,307 4,198,735 0 1,668,625 168,679 0 0 25,201,414 36 METERS 124,763,852 38,756,001 363,661 0 85,644,190 706 7,488,950 0 2,808,623 283,920 0 0 81,247,077 37 STREET LIGHTS 6,708,087 175,721 19,553 0 6,512,814 10,184 400,190 0 151,009 15,265 0 0 6,268,714 38 INSTALL ON CUST PREMISES 4,787,668 1,206,758 13,955 0 3,566,955 1,051 287,131 0 107,778 10,895 0 0 3,397,445 39 0 0 0 0 0 0 0 0 0 0 0 0 0 40 CUSTOMER ACCOUNTING 0 0 0 0 0 0 0 0 0 0 0 0 0 41 METER READING 0 0 0 0 0 0 0 0 0 0 0 0 0 42 CUSTOMER ACCOUNTS 0 0 0 0 0 0 0 0 0 0 0 0 0 43 UNCOLLECTIBLES 0 0 0 0 0 0 0 0 0 0 0 0 0 44 MISC 0 0 0 0 0 0 0 0 0 0 0 0 0 45 0 0 0 0 0 0 0 0 0 0 0 0 0 46 CONSUMER INFORMATION 0 0 0 0 0 0 0 0 0 0 0 0 0 47 CUSTOMER ASSIST 0 0 0 0 0 0 0 0 0 0 0 0 0 48 SALES EXPENSE 0 0 0 0 0 0 0 0 0 0 0 0 0 49 ADVERTISING 0 0 0 0 0 0 0 0 0 0 0 0 0 50 MISC 0 0 0 0 0 0 0 0 0 0 0 0 0 51 0 0 0 0 0 0 0 0 0 0 0 0 0 52 MISCELLANEOUS 0 0 0 0 0 0 0 0 0 0 0 0 0 53 DEMAND 0 0 0 0 0 0 0 0 0 0 0 0 0 54 ENERGY 0 0 0 0 0 0 0 0 0 0 0 0 0 55 CUSTOMER 0 0 0 0 0 0 0 0 0 0 0 0 0 56 REVENUE 0 0 0 0 0 0 0 0 0 0 0 0 0 57 OTHER 0 0 0 0 0 0 0 0 0 0 0 0 0 58 SUBSTATION CIAC 0 0 0 (42,770,847) (42,770,847)0 0 0 0 0 0 0 (42,770,847) 59 60 TOTALS 6,179,522,565 1,994,366,693 40,143,386 (42,770,847) 4,102,241,639 7,387,459 365,461,375 628,247 110,090,091 34,521,209 29,980,646 7,956,825 3,912,569,823 Exhibit No. 38 Case No. IPC-E-23-11 P. Goralski IPC Page 1 of 3 61 IDAHO POWER COMPANY 62 3CP/12CP CLASS COST OF SERVICE STUDY 63 *** OPERATING EXPENSES ***TWELVE MONTHS ENDING DECEMBER 31, 2023 64 SUMMARY OF FUNCTIONALIZED COSTS 65 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) (K) (L) (M) 66 FUNCTION OPERATION & DEPRECIATION AMORTIZATION OTHER REGULATORY PROV FOR DEFERRED ONST WORK TOTAL 67 MAINTENANCE EXPENSE EXPENSE TAXES DEB/CRED DEF FIT ITC IN PROGRES EXPENSES 68 PRODUCTION 69 DEMAND - Base-load 138,136,693 61,229,781 4,744,176 8,477,654 1,464,604 (5,884,910) 8,304,618 6,537,444 223,010,061 70 DEMAND - Peak 16,516,367 6,492,310 48,412 991,152 387,790 (554,569) 782,592 24,664,054 71 DEMAND - Not in Use 0 0 0 0 0 0 0 0 72 ENERGY - POWER SUPPLY 492,817,416 0 0 0 0 0 0 0 492,817,416 73 ENERGY - Summer 0 0 0 0 0 0 0 0 74 ENERGY - Non-Summer 0 0 0 0 0 0 0 0 75 0 0 0 0 0 0 0 0 76 TRANSMISSION 0 0 0 0 0 0 0 0 77 DEMAND - POWER SUPPLY 0 0 0 0 0 0 0 0 78 DEMAND - TRANSMISSION 48,778,156 28,824,414 348,044 7,560,424 481,088 (3,986,872) 5,626,160 87,631,416 79 DEMAND - SUBTRANSMISSION 0 0 0 0 0 0 0 0 80 DEMAND - DIRECT 3,521 1,909 20 444 28 (234) 330 6,018 81 0 0 0 0 0 0 0 0 82 DISTRIBUTION 0 0 0 0 0 0 0 0 83 SUBSTATIONS - GENERAL 17,911,499 9,040,007 112,576 1,875,874 155,610 (1,163,654) 1,642,116 29,574,028 84 SUBSTATIONS - DIRECT 814,448 145,538 5,250 31,792 7,257 (16,185) 22,840 1,010,940 85 LINES - PRIMARY DEMAND 47,352,090 12,917,578 137,497 2,516,018 190,057 (1,648,196) 2,222,644 63,687,687 86 LINES - PRIMARY CUSTOMER 23,468,360 6,402,133 68,145 1,246,974 94,195 (816,869) 1,101,574 31,564,512 87 LINES - SECONDARY DIRECT 1,634,918 849,132 8,592 157,228 11,877 (98,425) 138,894 2,702,216 88 LINE TRANS - PRIMARY DEMAND 1,990,925 2,620,571 30,929 565,960 42,752 (357,246) 499,968 5,393,859 89 LINE TRANS - PRIMARY CUST 986,730 1,298,792 15,329 280,498 21,188 (177,056) 247,791 2,673,272 90 LINE TRANS - SECOND DIRECT 551,763 726,262 8,572 156,850 11,848 (98,188) 138,561 1,495,666 91 LINE TRANS - SECOND DEMAND 5,757,998 7,579,012 89,450 1,636,826 123,644 (1,033,747) 1,445,968 15,599,151 92 LINE TRANS - SECOND CUSTOME 2,853,745 3,756,265 44,333 811,234 61,280 (512,340) 716,642 7,731,158 93 LINES - SECONDARY DEMAND 3,301,093 831,250 8,812 161,241 12,180 (113,272) 142,440 4,343,745 94 LINES - SECONDARY CUSTOMER 1,636,068 411,979 4,367 79,913 6,037 (56,139) 70,595 2,152,821 95 SERVICES 1,141,837 1,329,707 17,932 328,134 24,787 (229,154) 289,873 2,903,116 96 METERS 18,706,555 6,073,947 30,183 552,314 41,721 (345,766) 487,913 25,546,867 97 STREET LIGHTS 554,840 227,907 1,623 29,696 2,243 (18,824) 26,233 823,719 98 INSTALL ON CUST PREMISES 2,894,436 193,695 1,158 21,194 1,601 (13,292) 18,723 3,117,516 99 0 0 0 0 0 0 0 0 100 CUSTOMER ACCOUNTING 0 0 0 0 0 0 0 0 101 METER READING 3,681,466 0 0 0 0 0 0 3,681,466 102 CUSTOMER ACCOUNTS 32,460,816 0 0 0 0 0 0 32,460,816 103 UNCOLLECTIBLES 5,388,730 0 0 0 0 0 0 5,388,730 104 MISC 0 0 0 0 0 0 0 0 105 0 0 0 0 0 0 0 0 106 CONSUMER INFORMATION 0 0 0 0 0 0 0 0 107 CUSTOMER ASSIST 19,150,720 0 0 0 0 0 0 19,150,720 108 SALES EXPENSE 0 0 0 0 0 0 0 0 109 ADVERTISING 0 0 0 0 0 0 0 0 110 MISC 0 0 0 0 0 0 0 0 111 0 0 0 0 0 0 0 0 112 MISCELLANEOUS 0 0 0 0 0 0 0 0 113 DEMAND 0 0 0 0 0 0 0 0 114 ENERGY 0 0 0 2,119,909 0 0 0 2,119,909 115 CUSTOMER 0 0 0 0 0 0 0 0 116 REVENUE 0 0 0 0 0 0 0 0 117 OTHER 332,773 0 0 0 0 0 0 332,773 118 RETAIL SALES REVENUE 0 0 0 0 0 0 0 0 119 120 TOTALS 888,823,963 150,952,190 5,725,400 29,601,331 3,141,786 (17,124,938) 23,926,476 6,537,444 0 0 0 0 1,091,583,652 Exhibit No. 38 Case No. IPC-E-23-11 P. Goralski IPC Page 2 of 3 121 IDAHO POWER COMPANY 122 3CP/12CP CLASS COST OF SERVICE STUDY 123 *** OTHER REVENUES ***TWELVE MONTHS ENDING DECEMBER 31, 2023 124 SUMMARY OF FUNCTIONALIZED COSTS 125 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) (K) (L) (M) 126 FUNCTION REVENUES TOTAL 127 REVENUES 128 PRODUCTION 129 DEMAND - Base-load 1,105,981 1,105,981 130 DEMAND - Peak 2,661 2,661 131 DEMAND - Not in Use 0 0 132 ENERGY - POWER SUPPLY 29,557,875 29,557,875 133 ENERGY - Summer 0 0 134 ENERGY - Non-Summer 0 0 135 0 136 TRANSMISSION 0 137 DEMAND - POWER SUPPLY 0 0 138 DEMAND - TRANSMISSION 60,109,852 60,109,852 139 DEMAND - SUBTRANSMISSION 0 0 140 DEMAND - DIRECT 518 518 141 0 142 DISTRIBUTION 0 143 SUBSTATIONS - GENERAL 299,274 299,274 144 SUBSTATIONS - DIRECT 13,957 13,957 145 LINES - PRIMARY DEMAND 2,502,919 2,502,919 146 LINES - PRIMARY CUSTOMER 1,240,482 1,240,482 147 LINES - SECONDARY DIRECT 107,956 107,956 148 LINE TRANS - PRIMARY DEMAND 350,797 350,797 149 LINE TRANS - PRIMARY CUST 173,860 173,860 150 LINE TRANS - SECOND DIRECT 97,220 97,220 151 LINE TRANS - SECOND DEMAND 1,014,549 1,014,549 152 LINE TRANS - SECOND CUSTOME 502,825 502,825 153 LINES - SECONDARY DEMAND 156,826 156,826 154 LINES - SECONDARY CUSTOMER 77,725 77,725 155 SERVICES 203,386 203,386 156 METERS 80,239 80,239 157 STREET LIGHTS 18,406 18,406 158 INSTALL ON CUST PREMISES 13,137 13,137 159 0 160 CUSTOMER ACCOUNTING 0 161 METER READING 0 0 162 CUSTOMER ACCOUNTS 0 0 163 UNCOLLECTIBLES 0 0 164 MISC 0 0 165 0 166 CONSUMER INFORMATION 0 167 CUSTOMER ASSIST 0 0 168 SALES EXPENSE 0 0 169 ADVERTISING 0 0 170 MISC 0 0 171 0 172 MISCELLANEOUS 0 173 DEMAND 0 0 174 ENERGY 0 0 175 CUSTOMER 0 0 176 MISC. REVENUE 6,150,427 6,150,427 177 FACILITIES CHARGE REVENUE 9,859,316 9,859,316 178 RETAIL SALES REVENUE 0 179 180 TOTALS 113,640,190 0 0 0 0 0 0 0 0 0 0 113,640,190 Exhibit No. 38 Case No. IPC-E-23-11 P. Goralski IPC Page 3 of 3 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CASE NO. IPC-E-23-11 IDAHO POWER COMPANY GORALSKI, DI TESTIMONY EXHIBIT NO. 39 1 IDAHO POWER COMPANY 2 3CP/12CP CLASS COST OF SERVICE STUDY 3 TWELVE MONTHS ENDING DECEMBER 31, 2023 4 ALLOCATION TO CLASSES 5 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 6 SOURCES TOTALS RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 7 *** SUMMARY OF RESULTS ***& NOTES RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING EC/PRIM/TRA SECONDARY 8 (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 9 10 RATE BASE 11 ELECTRIC PLANT IN SERVICE PAGE 2C 6,179,522,565 2,817,968,008 87,956,334 85,902,468 456,112 193,263,380 1,134,709,132 5,857,139 650,933,342 951,366,556 12 LESS: ACCUM PROVISION FOR DEPRECIATION PAGE 2D 1,994,366,693 921,361,756 28,133,301 28,458,084 143,379 62,367,609 368,351,197 1,523,155 211,347,951 296,136,020 13 : AMORT OF OTHER UTILITY PLANT PAGE 2E 40,143,386 17,679,176 506,489 449,874 2,228 1,348,962 7,989,663 17,072 4,710,910 5,478,003 14 SUBSTATION CIAC PAGE 2F (42,770,847) (4,292,179) (205,156) (472,238) (6,923) (1,519,756) (2,598,489) (4,296) (15,762,857) (3,041,944) 15 NET ELECTRIC PLANT IN SERVICE 4,102,241,639 1,874,634,897 59,111,388 56,522,272 303,581 128,027,053 755,769,783 4,312,615 419,111,624 646,710,588 16 CUSTOMER ADVANCES FOR CONSTRUCTION PAGE 2H 7,387,459 4,347,671 154,394 200,296 1,030 102,620 1,027,059 2,848 399,869 1,108,864 17 ACCUMULATED DEFERRED INCOME TAXES PAGE 2I 365,461,375 167,060,145 5,192,663 5,085,278 26,799 11,494,617 67,389,032 349,846 38,650,665 56,109,225 18 ELECTRIC PLANT ACQUISITION ADJUSTMENT PAGE 2J 628,247 267,673 7,023 5,597 25 21,946 130,853 0 78,393 82,507 19 WORKING CAPITAL PAGE 2K 110,090,091 49,797,567 1,639,182 1,688,736 9,167 3,441,483 19,895,022 140,180 11,782,152 17,303,885 20 DEFERRED PROGRAMS PAGE 2L 34,521,209 15,072,007 424,089 371,436 1,784 1,129,045 6,680,942 13,329 3,920,677 5,268,086 21 SUBSIDIARY RATE BASE PAGE 2M 29,980,646 11,169,860 315,122 283,541 1,236 1,183,254 6,747,739 10,573 4,695,810 3,528,365 22 PLANT HELD FOR FUTURE USE PAGE 2N 7,956,825 3,145,909 126,112 67,402 747 250,847 1,474,094 2,038 963,340 1,767,139 23 24 TOTAL RATE BASE 3,912,569,823 1,782,680,096 56,275,860 53,653,411 288,712 122,456,391 722,282,341 4,126,040 401,501,460 617,442,481 25 26 27 RETURN UNDER PRESENT RATES 28 SALES REVENUES PAGE 1 1,293,009,840 566,136,133 13,032,773 17,760,920 48,160 43,557,610 269,827,909 1,327,038 153,898,825 162,447,833 29 OTHER OPERATING REVENUES PAGE 4C 113,640,190 46,200,098 1,158,525 1,173,490 4,682 6,781,861 20,560,253 112,468 18,324,115 12,860,615 30 TOTAL OPERATING REVENUES 1,406,650,030 612,336,231 14,191,298 18,934,410 52,842 50,339,471 290,388,162 1,439,506 172,222,939 175,308,448 31 32 OPERATING EXPENSES 33 OPERATION & MAINTENANCE EXPENSES PAGE 3C 888,823,963 388,738,091 11,127,348 12,888,267 53,211 29,936,675 176,244,175 616,357 112,246,184 109,548,662 34 DEPRECIATION EXPENSE PAGE 3D 150,952,190 69,023,727 2,106,824 2,171,839 10,768 4,779,265 28,116,787 50,132 15,972,606 22,676,682 35 AMORTIZATION OF LIMITED TERM PLANT PAGE 3E 5,725,400 2,491,872 69,110 58,965 282 196,930 1,169,587 417 695,293 747,246 36 TAXES OTHER THAN INCOME PAGE 3F 29,601,331 13,347,740 407,862 402,452 2,065 947,637 5,535,886 8,310 3,240,936 4,495,074 37 REGULATORY DEBITS/CREDITS PAGE 3G 3,141,786 1,398,600 41,212 38,043 192 100,848 594,931 576 345,861 481,396 38 PROVISION FOR DEFERRED INCOME TAXES PAGE 3H (17,124,938) (7,870,826) (245,266) (242,206) (1,274) (534,177) (3,147,003) (4,774) (1,798,057) (2,628,690) 39 INVESTMENT TAX CREDIT ADJUSTMENT PAGE 3I 23,926,476 10,965,963 341,101 335,293 1,765 750,485 4,407,628 6,673 2,524,389 3,673,546 40 CONSTRUCTION WORK IN PROGRESS PAGE 3J 6,537,444 2,796,006 73,882 58,927 265 232,072 1,383,095 0 831,110 799,028 41 FEDERAL INCOME TAXES PAGE 1 39,040,245 13,370,532 262,324 322,579 494 1,659,227 9,065,970 7,507 6,781,260 4,554,856 42 STATE INCOME TAXES PAGE 1 (2,828,435) (968,684) (19,005) (23,371) (36) (120,210) (656,822) (544) (491,297) (329,996) 43 TOTAL OPERATING EXPENSES 1,127,795,462 493,293,021 14,165,393 16,010,788 67,732 37,948,754 222,714,233 684,655 140,348,285 144,017,803 44 45 OPERATING INCOME 278,854,568 119,043,210 25,905 2,923,623 (14,890) 12,390,717 67,673,928 754,851 31,874,654 31,290,645 46 47 ADD: IERCO OPERATING INCOME PAGE 1 1,759,534 655,548 18,494 16,641 73 69,444 396,018 621 275,592 207,076 48 CONSOLIDATED OPERATING INCOME 280,614,102 119,698,758 44,400 2,940,263 (14,817) 12,460,161 68,069,946 755,471 32,150,247 31,497,721 49 50 51 RATE OF RETURN UNDER PRESENT RATES 7.172% 6.715% 0.079% 5.480% -5.132% 10.175% 9.424% 18.310% 8.008% 5.101% 52 RATE OF RETURN INDEX 1.000 0.936 0.011 0.764 (0.716) 1.419 1.314 2.553 1.116 0.711 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 1 of 48 1 IDAHO POWER COMPANY 2 3CP/12CP CLASS COST OF SERVICE STUDY 3 TWELVE MONTHS ENDING DECEMBER 31, 2023 4 ALLOCATION TO CLASSES 5 (K) (L) (M) (N) (O) (P) 6 SOURCES TOTALS UNMETERED MUNICIPAL TRAFFIC SC SC SC 7 *** SUMMARY OF RESULTS ***& NOTES GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 8 (40) (41) (42) 9 10 RATE BASE 11 ELECTRIC PLANT IN SERVICE PAGE 2C 6,179,522,565 5,566,052 12,793,366 1,496,706 45,213,165 37,652,894 148,387,912 12 LESS: ACCUM PROVISION FOR DEPRECIATION PAGE 2D 1,994,366,693 1,760,030 1,979,162 476,366 15,377,730 12,079,222 44,871,729 13 : AMORT OF OTHER UTILITY PLANT PAGE 2E 40,143,386 31,489 37,290 7,485 408,021 282,490 1,194,233 23 SUBSTATION CIAC PAGE 2F (42,770,847) (10,144) (21,076) (1,060) 0 (70,288) (14,764,442) 15 NET ELECTRIC PLANT IN SERVICE 4,102,241,639 3,764,389 10,755,838 1,011,795 29,427,413 25,220,894 87,557,509 16 CUSTOMER ADVANCES FOR CONSTRUCTION PAGE 2H 7,387,459 10,108 29,490 3,144 0 62 2 17 ACCUMULATED DEFERRED INCOME TAXES PAGE 2I 365,461,375 329,188 755,652 88,821 2,713,982 2,188,449 8,027,016 18 ELECTRIC PLANT ACQUISITION ADJUSTMENT PAGE 2J 628,247 425 0 87 7,526 4,844 21,349 19 WORKING CAPITAL PAGE 2K 110,090,091 111,796 325,745 30,946 748,168 708,114 2,467,948 20 DEFERRED PROGRAMS PAGE 2L 34,521,209 25,867 29,113 6,090 326,077 239,943 1,012,723 21 SUBSIDIARY RATE BASE PAGE 2M 29,980,646 28,061 47,932 5,743 460,286 338,953 1,164,174 22 PLANT HELD FOR FUTURE USE PAGE 2N 7,956,825 6,596 9,997 867 31,630 20,361 89,747 23 24 TOTAL RATE BASE 3,912,569,823 3,597,837 10,383,484 963,563 28,287,118 24,344,597 84,286,431 25 26 27 RETURN UNDER PRESENT RATES 28 SALES REVENUES PAGE 1 1,293,009,840 1,309,792 3,750,417 199,244 13,302,981 9,818,665 36,591,539 29 OTHER OPERATING REVENUES PAGE 4C 113,640,190 93,861 176,934 19,105 1,187,749 1,744,729 3,241,706 30 TOTAL OPERATING REVENUES 1,406,650,030 1,403,653 3,927,351 218,349 14,490,730 11,563,394 39,833,245 31 32 OPERATING EXPENSES 33 OPERATION & MAINTENANCE EXPENSES PAGE 3C 888,823,963 901,046 1,947,396 254,097 9,999,258 7,468,743 26,854,451 34 DEPRECIATION EXPENSE PAGE 3D 150,952,190 130,341 365,665 37,901 1,157,872 917,560 3,434,221 35 AMORTIZATION OF LIMITED TERM PLANT PAGE 3E 5,725,400 4,267 3,100 960 63,741 42,128 181,501 36 TAXES OTHER THAN INCOME PAGE 3F 29,601,331 26,730 59,758 7,082 236,953 189,440 693,404 37 REGULATORY DEBITS/CREDITS PAGE 3G 3,141,786 2,559 4,285 643 26,845 20,698 85,097 38 PROVISION FOR DEFERRED INCOME TAXES PAGE 3H (17,124,938) (15,575) (35,952) (4,223) (125,296) (101,036) (370,583) 39 INVESTMENT TAX CREDIT ADJUSTMENT PAGE 3I 23,926,476 21,651 49,777 5,857 176,815 142,577 522,956 40 CONSTRUCTION WORK IN PROGRESS PAGE 3J 6,537,444 4,509 0 922 81,598 51,026 225,005 41 FEDERAL INCOME TAXES PAGE 3J 39,040,245 36,701 53,040 6,863 692,053 509,028 1,717,811 42 STATE INCOME TAXES PAGE 1 (2,828,435) (2,659) (3,843) (497) (50,139) (36,879) (124,454) 43 TOTAL OPERATING EXPENSES 1,127,795,462 1,109,570 2,443,226 309,606 12,259,699 9,203,286 33,219,409 44 45 OPERATING INCOME 278,854,568 294,083 1,484,125 (91,256) 2,231,030 2,360,107 6,613,835 46 47 ADD: IERCO OPERATING INCOME PAGE 1 1,759,534 1,647 2,813 337 27,014 19,893 68,324 48 CONSOLIDATED OPERATING INCOME 280,614,102 295,730 1,486,938 (90,919) 2,258,044 2,380,000 6,682,159 49 50 51 RATE OF RETURN UNDER PRESENT RATES 7.172% 8.220% 14.320% -9.436% 7.983% 9.776% 7.928% 52 RATE OF RETURN INDEX 1.000 1.146 1.997 (1.316) 1.113 1.363 1.105 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 2 of 48 53 IDAHO POWER COMPANY PAGE 2C 54 3CP/12CP CLASS COST OF SERVICE STUDY 55 TWELVE MONTHS ENDING DECEMBER 31, 2023 56 *** TABLE 1 - PLANT IN SERVICE ***ALLOCATION TO C TION TO CLASSES 57 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 58 FUNCTION ALLOCATION TOTALS RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 59 FACTOR RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING EC/PRIM/TRA SECONDARY 60 PRODUCTION (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 61 DEMAND - BASE-LOAD TOTAL 2,123,568,725 62 DEMAND - Base-load Summer D10BS 912,537,126 376,673,290 9,220,865 6,956,707 24,362 26,841,350 158,618,772 0 91,778,497 201,916,584 63 DEMAND - Peak D10P 200,116,177 82,603,126 2,022,103 1,525,581 5,343 5,886,214 34,784,538 0 20,126,701 44,279,595 64 DEMAND - Base-load Non-Summer D10BNS 1,211,031,599 531,557,965 14,778,334 12,184,575 61,839 48,543,094 290,654,133 0 178,192,266 57,632,856 65 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 0 0 0 66 ENERGY - Summer E10S 0 0 0 0 0 0 0 0 0 0 67 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 0 0 0 68 0 69 TRANSMISSION 0 70 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 71 DEMAND - TRANSMISSION D13 1,438,662,020 612,960,171 16,081,551 12,817,335 56,695 50,256,351 299,648,375 0 179,516,094 188,938,204 72 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 73 DEMAND - DIRECT DA3509 84,425 0 0 0 0 84,425 0 0 0 0 74 0 75 DISTRIBUTION 0 76 SUBSTATIONS - GENERAL D20 465,340,871 176,891,787 8,454,990 3,840,624 56,305 13,883,137 80,890,364 178,369 55,482,426 124,322,651 77 SUBSTATIONS - DIRECT DA3602 21,701,923 0 0 0 0 0 0 0 5,490 0 78 LINES - PRIMARY DEMAND D20 568,351,006 216,049,420 10,326,629 4,690,803 68,770 16,956,377 98,796,651 217,854 67,764,287 151,843,322 79 LINES - PRIMARY CUSTOMER C20 281,682,735 231,590,653 6,248,594 14,296,103 41,147 131,671 17,758,414 0 53,609 9,018,943 80 LINES - SECONDARY DIRECT DA3647 35,516,616 0 0 0 0 9,491,902 0 439,858 20,759,445 0 81 LINE TRANS - PRIMARY DEMAND D50 127,846,492 48,598,771 2,322,901 1,055,163 15,469 3,814,216 22,223,600 49,005 15,243,092 34,156,069 82 LINE TRANS - PRIMARY CUST C50 63,362,516 52,094,660 1,405,576 3,215,806 9,256 29,618 3,994,628 0 12,059 2,028,747 83 LINE TRANS - SECOND DIRECT DA368 35,431,232 0 0 0 0 14,022,768 0 0 19,352,982 0 84 LINE TRANS - SECOND DEMAND D60 369,747,673 165,102,692 7,891,501 3,584,662 52,553 0 75,499,361 166,481 162,458 116,037,068 85 LINE TRANS - SECOND CUSTOMER C60 183,252,136 150,763,036 4,067,768 9,306,610 26,786 0 11,560,538 0 306 5,871,235 86 LINES - SECONDARY DEMAND D30 36,423,303 23,702,539 1,132,923 514,623 7,545 0 10,838,869 23,900 23,323 0 87 LINES - SECONDARY CUSTOMER C30 18,051,900 15,343,023 413,973 947,126 2,726 0 1,176,506 0 31 0 88 SERVICES CW369 74,123,210 59,450,076 1,601,186 3,905,191 11,065 220,591 5,616,328 0 317,126 2,997,199 89 METERS CW370 124,763,852 74,586,799 1,987,439 7,061,560 16,250 3,083,729 22,648,055 560 2,140,242 12,324,084 90 STREET LIGHTS DA373 6,708,087 0 0 0 0 14,118 0 0 173 0 91 INSTALL ON CUST PREMISES DA371 4,787,668 0 0 0 0 3,819 0 4,781,112 2,737 0 92 0 93 CUSTOMER ACCOUNTING 0 94 METER READING CW902 0 0 0 0 0 0 0 0 0 0 95 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 0 0 0 96 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 0 0 0 97 MISC C10 0 0 0 0 0 0 0 0 0 0 98 0 99 CONSUMER INFORMATION 0 100 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 0 0 0 101 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 102 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 103 MISC C10 0 0 0 0 0 0 0 0 0 0 104 0 105 MISCELLANEOUS 0 106 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 107 ENERGY E99U 0 0 0 0 0 0 0 0 0 0 108 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 109 REVENUE R02 0 0 0 0 0 0 0 0 0 0 110 OTHER R01 0 0 0 0 0 0 0 0 0 0 111 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 0 0 0 112 113 TOTALS PAGE 2C 6,179,522,565 2,817,968,008 87,956,334 85,902,468 456,112 193,263,380 1,134,709,132 5,857,139 650,933,342 951,366,556 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 3 of 48 53 IDAHO POWER COMPANY 54 3CP/12CP CLASS COST OF SERVICE STUDY 55 TWELVE MONTHS ENDING DECEMBER 31, 2023 56 *** TABLE 1 - PLANT IN SERVICE ***ALLOCATION TO CLASSES 57 (K) (L) (M) (N) (O) (P) 58 FUNCTION ALLOCATION TOTALS UNMETERED MUNICIPAL TRAFFIC SC SC SC 59 FACTOR GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 60 PRODUCTION (40) (41) (42) 61 DEMAND - BASE-LOAD TOTAL 2,123,568,725 62 DEMAND - Base-load Summer D10BS 912,537,126 492,751 0 98,491 6,564,608 6,308,535 27,042,312 63 DEMAND - Peak D10P 200,116,177 108,059 0 21,599 1,439,595 1,383,440 5,930,284 64 DEMAND - Base-load Non-Summer D10BNS 1,211,031,599 971,964 0 201,068 19,940,877 10,266,336 46,046,292 65 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 66 ENERGY - Summer E10S 0 0 0 0 0 0 0 67 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 68 69 TRANSMISSION 0 70 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 71 DEMAND - TRANSMISSION D13 1,438,662,020 972,112 0 198,507 17,235,001 11,093,508 48,888,117 72 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 73 DEMAND - DIRECT DA3509 84,425 0 0 0 0 0 0 74 75 DISTRIBUTION 76 SUBSTATIONS - GENERAL D20 465,340,871 421,174 875,026 44,017 0 0 0 77 SUBSTATIONS - DIRECT DA3602 21,701,923 0 0 0 0 1,634,335 20,062,099 78 LINES - PRIMARY DEMAND D20 568,351,006 514,407 1,068,726 53,761 0 0 0 79 LINES - PRIMARY CUSTOMER C20 281,682,735 782,031 1,401,355 360,214 0 0 0 80 LINES - SECONDARY DIRECT DA3647 35,516,616 0 0 0 0 4,825,412 0 81 LINE TRANS - PRIMARY DEMAND D50 127,846,492 115,712 240,402 12,093 0 0 0 82 LINE TRANS - PRIMARY CUST C50 63,362,516 175,912 315,225 81,028 0 0 0 83 LINE TRANS - SECOND DIRECT DA368 35,431,232 0 0 0 0 2,055,481 0 84 LINE TRANS - SECOND DEMAND D60 369,747,673 393,104 816,709 41,084 0 0 0 85 LINE TRANS - SECOND CUSTOMER C60 183,252,136 509,094 912,267 234,496 0 0 0 86 LINES - SECONDARY DEMAND D30 36,423,303 56,435 117,249 5,898 0 0 0 87 LINES - SECONDARY CUSTOMER C30 18,051,900 51,810 92,841 23,864 0 0 0 88 SERVICES CW369 74,123,210 0 0 0 0 4,448 0 89 METERS CW370 124,763,852 1,486 259,770 120,587 33,083 81,400 418,809 90 STREET LIGHTS DA373 6,708,087 0 6,693,796 0 0 0 0 91 INSTALL ON CUST PREMISES DA371 4,787,668 0 0 0 0 0 0 92 93 CUSTOMER ACCOUNTING 94 METER READING CW902 0 0 0 0 0 0 0 95 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 96 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 97 MISC C10 0 0 0 0 0 0 0 98 99 CONSUMER INFORMATION 100 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 101 SALES EXPENSE C10 0 0 0 0 0 0 0 102 ADVERTISING C10 0 0 0 0 0 0 0 103 MISC C10 0 0 0 0 0 0 0 104 105 MISCELLANEOUS 106 DEMAND D99U 0 0 0 0 0 0 0 107 ENERGY E99U 0 0 0 0 0 0 0 108 CUSTOMER C10 0 0 0 0 0 0 0 109 REVENUE R02 0 0 0 0 0 0 0 110 OTHER R01 0 0 0 0 0 0 0 111 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 113 TOTALS 6,179,522,565 5,566,052 12,793,366 1,496,706 45,213,165 37,652,894 148,387,912 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 4 of 48 114 IDAHO POWER COMPANY PAGE 2D 115 3CP/12CP CLASS COST OF SERVICE STUDY 116 TWELVE MONTHS ENDING DECEMBER 31, 2023 117 *** TABLE 2 - ACCUMULATED RESERVE FOR DEPRECIATION ***ALLOCATION TO C TION TO CLASSES 118 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 119 FUNCTION ALLOCATION TOTALS RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 120 FACTOR RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING EC/PRIM/TRA SECONDARY 121 PRODUCTION (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 122 DEMAND - BASE-LOAD TOTAL 775,552,890 123 DEMAND - Base-load Summer D10BS 333,269,555 137,565,625 3,367,571 2,540,673 8,897 9,802,785 57,929,487 0 33,518,613 73,742,370 124 DEMAND - Peak D10P 69,317,877 28,612,746 700,433 528,443 1,851 2,038,915 12,048,953 0 6,971,651 15,337,928 125 DEMAND - Base-load Non-Summer D10BNS 442,283,334 194,131,375 5,397,226 4,449,954 22,584 17,728,523 106,150,392 0 65,077,963 21,048,213 126 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 0 0 0 127 ENERGY - Summer E10S 0 0 0 0 0 0 0 0 0 0 128 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 0 0 0 129 0 130 TRANSMISSION 0 131 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 132 DEMAND - TRANSMISSION D13 433,115,447 184,534,321 4,841,421 3,858,714 17,068 15,129,893 90,210,444 0 54,044,099 56,880,667 133 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 134 DEMAND - DIRECT DA3509 21,968 0 0 0 0 21,968 0 0 0 0 135 0 136 DISTRIBUTION 0 137 SUBSTATIONS - GENERAL D20 94,499,470 35,922,441 1,717,004 779,938 11,434 2,819,329 16,426,875 36,222 11,267,138 25,246,922 138 SUBSTATIONS - DIRECT DA3602 1,380,982 0 0 0 0 0 0 0 349 0 139 LINES - PRIMARY DEMAND D20 199,786,215 75,945,490 3,630,007 1,648,907 24,174 5,960,490 34,728,907 76,580 23,820,439 53,375,823 140 LINES - PRIMARY CUSTOMER C20 99,016,852 81,408,530 2,196,500 5,025,353 14,464 46,285 6,242,421 0 18,845 3,170,330 141 LINES - SECONDARY DIRECT DA3647 11,284,088 0 0 0 0 3,015,700 0 139,749 6,595,544 0 142 LINE TRANS - PRIMARY DEMAND D50 33,700,274 12,810,613 612,316 278,140 4,078 1,005,425 5,858,130 12,918 4,018,072 9,003,523 143 LINE TRANS - PRIMARY CUST C50 16,702,329 13,732,127 370,509 847,685 2,440 7,807 1,052,982 0 3,179 534,777 144 LINE TRANS - SECOND DIRECT DA368 9,339,656 0 0 0 0 3,696,395 0 0 5,101,437 0 145 LINE TRANS - SECOND DEMAND D60 97,465,309 43,520,990 2,080,196 944,915 13,853 0 19,901,595 43,884 42,824 30,587,315 146 LINE TRANS - SECOND CUSTOMER C60 48,305,175 39,741,064 1,072,262 2,453,218 7,061 0 3,047,352 0 81 1,547,655 147 LINES - SECONDARY DEMAND D30 12,989,768 8,453,118 404,038 183,532 2,691 0 3,865,503 8,524 8,318 0 148 LINES - SECONDARY CUSTOMER C30 6,437,911 5,471,835 147,637 337,777 972 0 419,581 0 11 0 149 SERVICES CW369 45,312,003 36,342,221 978,815 2,387,269 6,764 134,848 3,433,298 0 193,861 1,832,207 150 METERS CW370 38,756,001 23,169,259 617,368 2,193,567 5,048 957,914 7,035,275 174 664,834 3,828,290 151 STREET LIGHTS DA373 175,721 0 0 0 0 370 0 0 5 0 152 INSTALL ON CUST PREMISES DA371 1,206,758 0 0 0 0 963 0 1,205,105 690 0 153 0 154 CUSTOMER ACCOUNTING 0 155 METER READING CW902 0 0 0 0 0 0 0 0 0 0 156 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 0 0 0 157 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 0 0 0 158 MISC C10 0 0 0 0 0 0 0 0 0 0 159 0 160 CONSUMER INFORMATION 0 161 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 0 0 0 162 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 163 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 164 MISC C10 0 0 0 0 0 0 0 0 0 0 165 0 166 MISCELLANEOUS 0 167 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 168 ENERGY E99U 0 0 0 0 0 0 0 0 0 0 169 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 170 REVENUE R02 0 0 0 0 0 0 0 0 0 0 171 OTHER R01 0 0 0 0 0 0 0 0 0 0 172 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 0 0 0 173 174 TOTALS PAGE 2D 1,994,366,693 921,361,756 28,133,301 28,458,084 143,379 62,367,609 368,351,197 1,523,155 211,347,951 296,136,020 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 5 of 48 114 IDAHO POWER COMPANY 115 3CP/12CP CLASS COST OF SERVICE STUDY 116 TWELVE MONTHS ENDING DECEMBER 31, 2023 117 *** TABLE 2 - ACCUMULATED RESERVE FOR DEPRECIATION ***ALLOCATION TO CLASSES 118 (K) (L) (M) (N) (O) (P) 119 FUNCTION ALLOCATION TOTALS UNMETERED MUNICIPAL TRAFFIC SC SC SC 120 FACTOR GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 121 PRODUCTION (40) (41) (42) 122 DEMAND - BASE-LOAD TOTAL 775,552,890 123 DEMAND - Base-load Summer D10BS 333,269,555 179,959 0 35,970 2,397,474 2,303,953 9,876,178 124 DEMAND - Peak D10P 69,317,877 37,430 0 7,482 498,659 479,207 2,054,180 125 DEMAND - Base-load Non-Summer D10BNS 442,283,334 354,973 0 73,432 7,282,649 3,749,390 16,816,661 126 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 127 ENERGY - Summer E10S 0 0 0 0 0 0 0 128 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 129 130 TRANSMISSION 0 131 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 132 DEMAND - TRANSMISSION D13 433,115,447 292,659 0 59,761 5,188,672 3,339,749 14,717,980 133 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 134 DEMAND - DIRECT DA3509 21,968 0 0 0 0 0 0 135 136 DISTRIBUTION 137 SUBSTATIONS - GENERAL D20 94,499,470 85,530 177,697 8,939 0 0 0 138 SUBSTATIONS - DIRECT DA3602 1,380,982 0 0 0 0 103,999 1,276,633 139 LINES - PRIMARY DEMAND D20 199,786,215 180,824 375,678 18,898 0 0 0 140 LINES - PRIMARY CUSTOMER C20 99,016,852 274,899 492,603 126,622 0 0 0 141 LINES - SECONDARY DIRECT DA3647 11,284,088 0 0 0 0 1,533,096 0 142 LINE TRANS - PRIMARY DEMAND D50 33,700,274 30,502 63,370 3,188 0 0 0 143 LINE TRANS - PRIMARY CUST C50 16,702,329 46,370 83,093 21,359 0 0 0 144 LINE TRANS - SECOND DIRECT DA368 9,339,656 0 0 0 0 541,824 0 145 LINE TRANS - SECOND DEMAND D60 97,465,309 103,622 215,284 10,830 0 0 0 146 LINE TRANS - SECOND CUSTOMER C60 48,305,175 134,197 240,473 61,813 0 0 0 147 LINES - SECONDARY DEMAND D30 12,989,768 20,127 41,815 2,103 0 0 0 148 LINES - SECONDARY CUSTOMER C30 6,437,911 18,477 33,110 8,511 0 0 0 149 SERVICES CW369 45,312,003 0 0 0 0 2,719 0 150 METERS CW370 38,756,001 462 80,694 37,458 10,277 25,286 130,097 151 STREET LIGHTS DA373 175,721 0 175,346 0 0 0 0 152 INSTALL ON CUST PREMISES DA371 1,206,758 0 0 0 0 0 0 153 154 CUSTOMER ACCOUNTING 155 METER READING CW902 0 0 0 0 0 0 0 156 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 157 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 158 MISC C10 0 0 0 0 0 0 0 159 160 CONSUMER INFORMATION 161 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 162 SALES EXPENSE C10 0 0 0 0 0 0 0 163 ADVERTISING C10 0 0 0 0 0 0 0 164 MISC C10 0 0 0 0 0 0 0 165 166 MISCELLANEOUS 167 DEMAND D99U 0 0 0 0 0 0 0 168 ENERGY E99U 0 0 0 0 0 0 0 169 CUSTOMER C10 0 0 0 0 0 0 0 170 REVENUE R02 0 0 0 0 0 0 0 171 OTHER R01 0 0 0 0 0 0 0 172 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 173 174 TOTALS PAGE 2D 1,994,366,693 1,760,030 1,979,162 476,366 15,377,730 12,079,222 44,871,729 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 6 of 48 175 IDAHO POWER COMPANY PAGE 2E 176 3CP/12CP CLASS COST OF SERVICE STUDY 177 TWELVE MONTHS ENDING DECEMBER 31, 2023 178 *** TABLE 3 - AMORTIZATION RESERVE***ALLOCATION TO C TION TO CLASSES 179 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 180 FUNCTION ALLOCATION TOTALS RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 181 FACTOR RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING EC/PRIM/TRA SECONDARY 182 PRODUCTION (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 183 DEMAND - BASE-LOAD TOTAL 28,321,108 184 DEMAND - Base-load Summer D10BS 12,170,109 5,023,527 122,975 92,779 325 357,971 2,115,429 0 1,224,010 2,692,873 185 DEMAND - Peak D10P 583,298 240,771 5,894 4,447 16 17,157 101,390 0 58,665 129,066 186 DEMAND - Base-load Non-Summer D10BNS 16,150,999 7,089,156 197,092 162,500 825 647,398 3,876,327 0 2,376,472 768,624 187 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 0 0 0 188 ENERGY - Summer E10S 0 0 0 0 0 0 0 0 0 0 189 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 0 0 0 190 0 191 TRANSMISSION 0 192 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 193 DEMAND - TRANSMISSION D13 4,193,406 1,786,654 46,874 37,360 165 146,487 873,414 0 523,253 550,716 194 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 195 DEMAND - DIRECT DA3509 246 0 0 0 0 246 0 0 0 0 196 0 197 DISTRIBUTION 0 198 SUBSTATIONS - GENERAL D20 1,356,374 515,603 24,645 11,195 164 40,467 235,779 520 161,720 362,375 199 SUBSTATIONS - DIRECT DA3602 63,257 0 0 0 0 0 0 0 16 0 200 LINES - PRIMARY DEMAND D20 1,656,627 629,740 30,100 13,673 200 49,424 287,972 635 197,519 442,592 201 LINES - PRIMARY CUSTOMER C20 821,048 675,040 18,213 41,670 120 384 51,762 0 156 26,288 202 LINES - SECONDARY DIRECT DA3647 103,524 0 0 0 0 27,667 0 1,282 60,510 0 203 LINE TRANS - PRIMARY DEMAND D50 372,646 141,656 6,771 3,076 45 11,118 64,777 143 44,431 99,558 204 LINE TRANS - PRIMARY CUST C50 184,689 151,845 4,097 9,373 27 86 11,644 0 35 5,913 205 LINE TRANS - SECOND DIRECT DA368 103,275 0 0 0 0 40,874 0 0 56,410 0 206 LINE TRANS - SECOND DEMAND D60 1,077,739 481,241 23,002 10,449 153 0 220,065 485 474 338,224 207 LINE TRANS - SECOND CUSTOMER C60 534,143 439,443 11,857 27,127 78 0 33,697 0 1 17,113 208 LINES - SECONDARY DEMAND D30 106,166 69,088 3,302 1,500 22 0 31,593 70 68 0 209 LINES - SECONDARY CUSTOMER C30 52,618 44,722 1,207 2,761 8 0 3,429 0 0 0 210 SERVICES CW369 216,054 173,285 4,667 11,383 32 643 16,370 0 924 8,736 211 METERS CW370 363,661 217,405 5,793 20,583 47 8,988 66,014 2 6,238 35,922 212 STREET LIGHTS DA373 19,553 0 0 0 0 41 0 0 1 0 213 INSTALL ON CUST PREMISES DA371 13,955 0 0 0 0 11 0 13,936 8 0 214 0 215 CUSTOMER ACCOUNTING 0 216 METER READING CW902 0 0 0 0 0 0 0 0 0 0 217 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 0 0 0 218 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 0 0 0 219 MISC C10 0 0 0 0 0 0 0 0 0 0 220 0 221 CONSUMER INFORMATION 0 222 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 0 0 0 223 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 224 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 225 MISC C10 0 0 0 0 0 0 0 0 0 0 226 0 227 MISCELLANEOUS 0 228 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 229 ENERGY E99U 0 0 0 0 0 0 0 0 0 0 230 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 231 REVENUE R02 0 0 0 0 0 0 0 0 0 0 232 OTHER R01 0 0 0 0 0 0 0 0 0 0 233 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 0 0 0 234 235 TOTALS PAGE 2E 40,143,386 17,679,176 506,489 449,874 2,228 1,348,962 7,989,663 17,072 4,710,910 5,478,003 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 7 of 48 175 IDAHO POWER COMPANY 176 3CP/12CP CLASS COST OF SERVICE STUDY 177 TWELVE MONTHS ENDING DECEMBER 31, 2023 178 *** TABLE 3 - AMORTIZATION RESERVE***ALLOCATION TO CLASSES 179 (K) (L) (M) (N) (O) (P) 180 FUNCTION ALLOCATION TOTALS UNMETERED MUNICIPAL TRAFFIC SC SC SC 181 FACTOR GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 182 PRODUCTION (40) (41) (42) 183 DEMAND - BASE-LOAD TOTAL 28,321,108 184 DEMAND - Base-load Summer D10BS 12,170,109 6,572 0 1,314 87,549 84,134 360,651 185 DEMAND - Peak D10P 583,298 315 0 63 4,196 4,032 17,286 186 DEMAND - Base-load Non-Summer D10BNS 16,150,999 12,963 0 2,682 265,943 136,918 614,099 187 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 188 ENERGY - Summer E10S 0 0 0 0 0 0 0 189 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 190 191 TRANSMISSION 0 192 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 193 DEMAND - TRANSMISSION D13 4,193,406 2,834 0 579 50,237 32,335 142,499 194 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 195 DEMAND - DIRECT DA3509 246 0 0 0 0 0 0 196 197 DISTRIBUTION 198 SUBSTATIONS - GENERAL D20 1,356,374 1,228 2,551 128 0 0 0 199 SUBSTATIONS - DIRECT DA3602 63,257 0 0 0 0 4,764 58,477 200 LINES - PRIMARY DEMAND D20 1,656,627 1,499 3,115 157 0 0 0 201 LINES - PRIMARY CUSTOMER C20 821,048 2,279 4,085 1,050 0 0 0 202 LINES - SECONDARY DIRECT DA3647 103,524 0 0 0 0 14,065 0 203 LINE TRANS - PRIMARY DEMAND D50 372,646 337 701 35 0 0 0 204 LINE TRANS - PRIMARY CUST C50 184,689 513 919 236 0 0 0 205 LINE TRANS - SECOND DIRECT DA368 103,275 0 0 0 0 5,991 0 206 LINE TRANS - SECOND DEMAND D60 1,077,739 1,146 2,381 120 0 0 0 207 LINE TRANS - SECOND CUSTOMER C60 534,143 1,484 2,659 684 0 0 0 208 LINES - SECONDARY DEMAND D30 106,166 164 342 17 0 0 0 209 LINES - SECONDARY CUSTOMER C30 52,618 151 271 70 0 0 0 210 SERVICES CW369 216,054 0 0 0 0 13 0 211 METERS CW370 363,661 4 757 351 96 237 1,221 212 STREET LIGHTS DA373 19,553 0 19,511 0 0 0 0 213 INSTALL ON CUST PREMISES DA371 13,955 0 0 0 0 0 0 214 215 CUSTOMER ACCOUNTING 216 METER READING CW902 0 0 0 0 0 0 0 217 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 218 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 219 MISC C10 0 0 0 0 0 0 0 220 221 CONSUMER INFORMATION 222 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 223 SALES EXPENSE C10 0 0 0 0 0 0 0 224 ADVERTISING C10 0 0 0 0 0 0 0 225 MISC C10 0 0 0 0 0 0 0 226 227 MISCELLANEOUS 228 DEMAND D99U 0 0 0 0 0 0 0 229 ENERGY E99U 0 0 0 0 0 0 0 230 CUSTOMER C10 0 0 0 0 0 0 0 231 REVENUE R02 0 0 0 0 0 0 0 232 OTHER R01 0 0 0 0 0 0 0 233 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 234 235 TOTALS PAGE 2E 40,143,386 31,489 37,290 7,485 408,021 282,490 1,194,233 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 8 of 48 236 IDAHO POWER COMPANY PAGE 2F 237 3CP/12CP CLASS COST OF SERVICE STUDY 238 TWELVE MONTHS ENDING DECEMBER 31, 2023 239 *** TABLE 4 - SUBSTATION CIAC ***ALLOCATION TO C TION TO CLASSES 240 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 241 FUNCTION ALLOCATION TOTALS RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 242 FACTOR RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING EC/PRIM/TRA SECONDARY 243 PRODUCTION (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 244 DEMAND - BASE-LOAD TOTAL 0 245 DEMAND - Base-load Summer D10BS 0 0 0 0 0 0 0 0 0 0 246 DEMAND - Peak D10P 0 0 0 0 0 0 0 0 0 0 247 DEMAND - Base-load Non-Summer D10BNS 0 0 0 0 0 0 0 0 0 0 248 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 0 0 0 249 ENERGY - Summer E10S 0 0 0 0 0 0 0 0 0 0 250 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 0 0 0 251 0 252 TRANSMISSION 0 253 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 254 DEMAND - TRANSMISSION D13 0 0 0 0 0 0 0 0 0 0 255 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 256 DEMAND - DIRECT DA3509 0 0 0 0 0 0 0 0 0 0 257 0 258 DISTRIBUTION 0 259 SUBSTATIONS - GENERAL D20 0 0 0 0 0 0 0 0 0 0 260 SUBSTATIONS - DIRECT DA3602 0 0 0 0 0 0 0 0 0 0 261 LINES - PRIMARY DEMAND D20 0 0 0 0 0 0 0 0 0 0 262 LINES - PRIMARY CUSTOMER C20 0 0 0 0 0 0 0 0 0 0 263 LINES - SECONDARY DIRECT DA3647 0 0 0 0 0 0 0 0 0 0 264 LINE TRANS - PRIMARY DEMAND D50 0 0 0 0 0 0 0 0 0 0 265 LINE TRANS - PRIMARY CUST C50 0 0 0 0 0 0 0 0 0 0 266 LINE TRANS - SECOND DIRECT DA368 0 0 0 0 0 0 0 0 0 0 267 LINE TRANS - SECOND DEMAND D60 0 0 0 0 0 0 0 0 0 0 268 LINE TRANS - SECOND CUSTOMER C60 0 0 0 0 0 0 0 0 0 0 269 LINES - SECONDARY DEMAND D30 0 0 0 0 0 0 0 0 0 0 270 LINES - SECONDARY CUSTOMER C30 0 0 0 0 0 0 0 0 0 0 271 SERVICES CW369 0 0 0 0 0 0 0 0 0 0 272 METERS CW370 0 0 0 0 0 0 0 0 0 0 273 STREET LIGHTS DA373 0 0 0 0 0 0 0 0 0 0 274 INSTALL ON CUST PREMISES DA371 0 0 0 0 0 0 0 0 0 0 275 0 276 CUSTOMER ACCOUNTING 0 277 METER READING CW902 0 0 0 0 0 0 0 0 0 0 278 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 0 0 0 279 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 0 0 0 280 MISC C10 0 0 0 0 0 0 0 0 0 0 281 0 282 CONSUMER INFORMATION 0 283 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 0 0 0 284 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 285 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 286 MISC C10 0 0 0 0 0 0 0 0 0 0 287 0 288 MISCELLANEOUS 0 289 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 290 ENERGY E99U 0 0 0 0 0 0 0 0 0 0 291 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 292 REVENUE R02 0 0 0 0 0 0 0 0 0 0 293 OTHER R01 0 0 0 0 0 0 0 0 0 0 294 SUBSTATION CIAC CIAC (42,770,847) (4,292,179) (205,156) (472,238) (6,923) (1,519,756) (2,598,489) (4,296) (15,762,857) (3,041,944) 295 296 TOTALS PAGE 2F (42,770,847) (4,292,179) (205,156) (472,238) (6,923) (1,519,756) (2,598,489) (4,296) (15,762,857) (3,041,944) Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 9 of 48 236 IDAHO POWER COMPANY 237 3CP/12CP CLASS COST OF SERVICE STUDY 238 TWELVE MONTHS ENDING DECEMBER 31, 2023 239 *** TABLE 4 - SUBSTATION CIAC ***ALLOCATION TO CLASSES 240 (K) (L) (M) (N) (O) (P) 241 FUNCTION ALLOCATION TOTALS UNMETERED MUNICIPAL TRAFFIC SC SC SC 242 FACTOR GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 243 PRODUCTION (40) (41) (42) 244 DEMAND - Base-load Summer 0 245 DEMAND - Base-load Summer D10BS 0 0 0 0 0 0 0 246 DEMAND - Peak D10P 0 0 0 0 0 0 0 247 DEMAND - Base-load Non-Summer D10BNS 0 0 0 0 0 0 0 248 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 249 ENERGY - Summer E10S 0 0 0 0 0 0 0 250 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 251 252 TRANSMISSION 0 0 0 0 0 0 0 253 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 254 DEMAND - TRANSMISSION D13 0 0 0 0 0 0 0 255 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 256 DEMAND - DIRECT DA3509 0 0 0 0 0 0 0 257 258 DISTRIBUTION 259 SUBSTATIONS - GENERAL D20 0 0 0 0 0 0 0 260 SUBSTATIONS - DIRECT DA3602 0 0 0 0 0 0 0 261 LINES - PRIMARY DEMAND D20 0 0 0 0 0 0 0 262 LINES - PRIMARY CUSTOMER C20 0 0 0 0 0 0 0 263 LINES - SECONDARY DIRECT DA3647 0 0 0 0 0 0 0 264 LINE TRANS - PRIMARY DEMAND D50 0 0 0 0 0 0 0 265 LINE TRANS - PRIMARY CUST C50 0 0 0 0 0 0 0 266 LINE TRANS - SECOND DIRECT DA368 0 0 0 0 0 0 0 267 LINE TRANS - SECOND DEMAND D60 0 0 0 0 0 0 0 268 LINE TRANS - SECOND CUSTOMER C60 0 0 0 0 0 0 0 269 LINES - SECONDARY DEMAND D30 0 0 0 0 0 0 0 270 LINES - SECONDARY CUSTOMER C30 0 0 0 0 0 0 0 271 SERVICES CW369 0 0 0 0 0 0 0 272 METERS CW370 0 0 0 0 0 0 0 273 STREET LIGHTS DA373 0 0 0 0 0 0 0 274 INSTALL ON CUST PREMISES DA371 0 0 0 0 0 0 0 275 276 CUSTOMER ACCOUNTING 277 METER READING CW902 0 0 0 0 0 0 0 278 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 279 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 280 MISC C10 0 0 0 0 0 0 0 281 282 CONSUMER INFORMATION 283 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 284 SALES EXPENSE C10 0 0 0 0 0 0 0 285 ADVERTISING C10 0 0 0 0 0 0 0 286 MISC C10 0 0 0 0 0 0 0 287 288 MISCELLANEOUS 289 DEMAND D99U 0 0 0 0 0 0 0 290 ENERGY E99U 0 0 0 0 0 0 0 291 CUSTOMER C10 0 0 0 0 0 0 0 292 REVENUE R02 0 0 0 0 0 0 0 293 OTHER R01 0 0 0 0 0 0 0 294 SUBSTATION CIAC CIAC (42,770,847) (10,144) (21,076) (1,060) 0 (70,288) (14,764,442) 295 296 TOTALS (42,770,847) (10,144) (21,076) (1,060) 0 (70,288) (14,764,442) Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 10 of 48 297 IDAHO POWER COMPANY PAGE 2H 298 3CP/12CP CLASS COST OF SERVICE STUDY 299 TWELVE MONTHS ENDING DECEMBER 31, 2023 300 *** TABLE 5 - CUSTOMER ADVANCES FOR CONSTRUCTION ***ALLOCATION TO C TION TO CLASSES 301 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 302 FUNCTION ALLOCATION TOTALS RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 303 FACTOR RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING EC/PRIM/TRA SECONDARY 304 (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 305 DEMAND - BASE-LOAD TOTAL 0 306 DEMAND - Base-load Summer D10BS 0 0 0 0 0 0 0 0 0 0 307 DEMAND - Peak D10P 0 0 0 0 0 0 0 0 0 0 308 DEMAND - Base-load Non-Summer D10BNS 0 0 0 0 0 0 0 0 0 0 309 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 0 0 0 310 ENERGY - Summer E10S 0 0 0 0 0 0 0 0 0 0 311 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 0 0 0 312 0 313 TRANSMISSION 0 314 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 315 DEMAND - TRANSMISSION D13 0 0 0 0 0 0 0 0 0 0 316 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 317 DEMAND - DIRECT DA3509 0 0 0 0 0 0 0 0 0 0 318 0 319 DISTRIBUTION 0 320 SUBSTATIONS - GENERAL D20 0 0 0 0 0 0 0 0 0 0 321 SUBSTATIONS - DIRECT DA3602 0 0 0 0 0 0 0 0 0 0 322 LINES - PRIMARY DEMAND D20 3,181,235 1,209,295 57,801 26,256 385 94,910 552,995 1,219 379,297 849,914 323 LINES - PRIMARY CUSTOMER C20 1,576,665 1,296,284 34,975 80,020 230 737 99,399 0 300 50,482 324 LINES - SECONDARY DIRECT DA3647 0 0 0 0 0 0 0 0 0 0 325 LINE TRANS - PRIMARY DEMAND D50 128,427 48,819 2,333 1,060 16 3,832 22,325 49 15,312 34,311 326 LINE TRANS - PRIMARY CUST C50 63,650 52,331 1,412 3,230 9 30 4,013 0 12 2,038 327 LINE TRANS - SECOND DIRECT DA368 0 0 0 0 0 0 0 0 0 0 328 LINE TRANS - SECOND DEMAND D60 395,224 176,479 8,435 3,832 56 0 80,701 178 174 124,032 329 LINE TRANS - SECOND CUSTOMER C60 195,879 161,151 4,348 9,948 29 0 12,357 0 0 6,276 330 LINES - SECONDARY DEMAND D30 536,323 349,013 16,682 7,578 111 0 159,599 352 343 0 331 LINES - SECONDARY CUSTOMER C30 265,809 225,922 6,096 13,946 40 0 17,324 0 0 0 332 SERVICES CW369 1,032,307 827,956 22,300 54,387 154 3,072 78,218 0 4,417 41,742 333 METERS CW370 706 422 11 40 0 17 128 0 12 70 334 STREET LIGHTS DA373 10,184 0 0 0 0 21 0 0 0 0 335 INSTALL ON CUST PREMISES DA371 1,051 0 0 0 0 1 0 1,050 1 0 336 0 337 CUSTOMER ACCOUNTING 0 338 METER READING CW902 0 0 0 0 0 0 0 0 0 0 339 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 0 0 0 340 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 0 0 0 341 MISC C10 0 0 0 0 0 0 0 0 0 0 342 0 343 CONSUMER INFORMATION 0 344 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 0 0 0 345 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 346 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 347 MISC C10 0 0 0 0 0 0 0 0 0 0 348 0 349 MISCELLANEOUS 0 350 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 351 ENERGY E99U 0 0 0 0 0 0 0 0 0 0 352 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 353 REVENUE R02 0 0 0 0 0 0 0 0 0 0 354 OTHER R01 0 0 0 0 0 0 0 0 0 0 355 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 0 0 0 356 357 TOTALS PAGE 2H 7,387,459 4,347,671 154,394 200,296 1,030 102,620 1,027,059 2,848 399,869 1,108,864 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 11 of 48 297 IDAHO POWER COMPANY 298 3CP/12CP CLASS COST OF SERVICE STUDY 299 TWELVE MONTHS ENDING DECEMBER 31, 2023 300 *** TABLE 5 - CUSTOMER ADVANCES FOR CONSTRUCTION ***ALLOCATION TO CLASSES 301 (K) (L) (M) (N) (O) (P) 302 FUNCTION ALLOCATION TOTALS UNMETERED MUNICIPAL TRAFFIC SC SC SC 303 FACTOR GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 304 (40) (41) (42) 305 DEMAND - BASE-LOAD TOTAL 0 306 DEMAND - Base-load Summer D10BS 0 0 0 0 0 0 0 307 DEMAND - Peak D10P 0 0 0 0 0 0 0 308 DEMAND - Base-load Non-Summer D10BNS 0 0 0 0 0 0 0 309 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 310 ENERGY - Summer E10S 0 0 0 0 0 0 0 311 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 312 313 TRANSMISSION 0 314 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 315 DEMAND - TRANSMISSION D13 0 0 0 0 0 0 0 316 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 317 DEMAND - DIRECT DA3509 0 0 0 0 0 0 0 318 319 DISTRIBUTION 320 SUBSTATIONS - GENERAL D20 0 0 0 0 0 0 0 321 SUBSTATIONS - DIRECT DA3602 0 0 0 0 0 0 0 322 LINES - PRIMARY DEMAND D20 3,181,235 2,879 5,982 301 0 0 0 323 LINES - PRIMARY CUSTOMER C20 1,576,665 4,377 7,844 2,016 0 0 0 324 LINES - SECONDARY DIRECT DA3647 0 0 0 0 0 0 0 325 LINE TRANS - PRIMARY DEMAND D50 128,427 116 241 12 0 0 0 326 LINE TRANS - PRIMARY CUST C50 63,650 177 317 81 0 0 0 327 LINE TRANS - SECOND DIRECT DA368 0 0 0 0 0 0 0 328 LINE TRANS - SECOND DEMAND D60 395,224 420 873 44 0 0 0 329 LINE TRANS - SECOND CUSTOMER C60 195,879 544 975 251 0 0 0 330 LINES - SECONDARY DEMAND D30 536,323 831 1,726 87 0 0 0 331 LINES - SECONDARY CUSTOMER C30 265,809 763 1,367 351 0 0 0 332 SERVICES CW369 1,032,307 0 0 0 0 62 0 333 METERS CW370 706 0 1 1 0 0 2 334 STREET LIGHTS DA373 10,184 0 10,163 0 0 0 0 335 INSTALL ON CUST PREMISES DA371 1,051 0 0 0 0 0 0 336 337 CUSTOMER ACCOUNTING 338 METER READING CW902 0 0 0 0 0 0 0 339 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 340 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 341 MISC C10 0 0 0 0 0 0 0 342 343 CONSUMER INFORMATION 344 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 345 SALES EXPENSE C10 0 0 0 0 0 0 0 346 ADVERTISING C10 0 0 0 0 0 0 0 347 MISC C10 0 0 0 0 0 0 0 348 349 MISCELLANEOUS 350 DEMAND D99U 0 0 0 0 0 0 0 351 ENERGY E99U 0 0 0 0 0 0 0 352 CUSTOMER C10 0 0 0 0 0 0 0 353 REVENUE R02 0 0 0 0 0 0 0 354 OTHER R01 0 0 0 0 0 0 0 355 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 356 357 TOTALS PAGE 2H 7,387,459 10,108 29,490 3,144 0 62 2 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 12 of 48 358 IDAHO POWER COMPANY PAGE 2I 359 3CP/12CP CLASS COST OF SERVICE STUDY 360 TWELVE MONTHS ENDING DECEMBER 31, 2023 361 *** TABLE 6 - ACCUMULATED DEFERRED INCOME TAXES ***ALLOCATION TO C TION TO CLASSES 362 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 363 FUNCTION ALLOCATION TOTALS RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 364 FACTOR RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING EC/PRIM/TRA SECONDARY 365 (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 366 DEMAND - BASE-LOAD TOTAL 127,470,124 367 DEMAND - Base-load Summer D10BS 54,776,292 22,610,331 553,495 417,586 1,462 1,611,189 9,521,309 0 5,509,130 12,120,320 368 DEMAND - Peak D10P 12,012,248 4,958,366 121,380 91,575 321 353,328 2,087,990 0 1,208,133 2,657,943 369 DEMAND - Base-load Non-Summer D10BNS 72,693,832 31,907,496 887,090 731,396 3,712 2,913,866 17,446,913 0 10,696,235 3,459,491 370 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 0 0 0 371 ENERGY - Summer E10S 0 0 0 0 0 0 0 0 0 0 372 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 0 0 0 373 0 374 TRANSMISSION 0 375 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 376 DEMAND - TRANSMISSION D13 86,357,660 36,793,775 965,317 769,378 3,403 3,016,706 17,986,805 0 10,775,700 11,341,275 377 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 378 DEMAND - DIRECT DA3509 5,068 0 0 0 0 5,068 0 0 0 0 379 0 380 DISTRIBUTION 0 381 SUBSTATIONS - GENERAL D20 25,205,345 9,581,403 457,967 208,029 3,050 751,985 4,381,454 9,661 3,005,224 6,733,978 382 SUBSTATIONS - DIRECT DA3602 350,573 0 0 0 0 0 0 0 89 0 383 LINES - PRIMARY DEMAND D20 33,343,743 12,675,083 605,838 275,198 4,035 994,789 5,796,154 12,781 3,975,563 8,908,271 384 LINES - PRIMARY CUSTOMER C20 16,525,627 13,586,849 366,590 838,717 2,414 7,725 1,041,842 0 3,145 529,119 385 LINES - SECONDARY DIRECT DA3647 2,131,934 0 0 0 0 569,764 0 26,403 1,246,114 0 386 LINE TRANS - PRIMARY DEMAND D50 7,642,983 2,905,356 138,869 63,080 925 228,023 1,328,582 2,930 911,270 2,041,935 387 LINE TRANS - PRIMARY CUST C50 3,787,970 3,114,349 84,029 192,249 553 1,771 238,809 0 721 121,284 388 LINE TRANS - SECOND DIRECT DA368 2,126,808 0 0 0 0 841,736 0 0 1,161,689 0 389 LINE TRANS - SECOND DEMAND D60 22,098,663 9,867,672 471,650 214,244 3,141 0 4,512,361 9,950 9,710 6,935,173 390 LINE TRANS - SECOND CUSTOMER C60 10,952,407 9,010,635 243,118 556,227 1,601 0 690,937 0 18 350,905 391 LINES - SECONDARY DEMAND D30 2,056,156 1,338,048 63,955 29,051 426 0 611,872 1,349 1,317 0 392 LINES - SECONDARY CUSTOMER C30 1,019,060 866,139 23,369 53,467 154 0 66,416 0 2 0 393 SERVICES CW369 4,198,735 3,367,570 90,700 221,211 627 12,495 318,139 0 17,964 169,777 394 METERS CW370 7,488,950 4,477,072 119,296 423,870 975 185,101 1,359,449 34 128,468 739,753 395 STREET LIGHTS DA373 400,190 0 0 0 0 842 0 0 10 0 396 INSTALL ON CUST PREMISES DA371 287,131 0 0 0 0 229 0 286,738 164 0 397 0 398 CUSTOMER ACCOUNTING 0 399 METER READING CW902 0 0 0 0 0 0 0 0 0 0 400 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 0 0 0 401 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 0 0 0 402 MISC C10 0 0 0 0 0 0 0 0 0 0 403 0 404 CONSUMER INFORMATION 0 405 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 0 0 0 406 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 407 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 408 MISC C10 0 0 0 0 0 0 0 0 0 0 409 0 410 MISCELLANEOUS 0 411 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 412 ENERGY E99U 0 0 0 0 0 0 0 0 0 0 413 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 414 REVENUE R02 0 0 0 0 0 0 0 0 0 0 415 OTHER R01 0 0 0 0 0 0 0 0 0 0 416 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 0 0 0 417 418 TOTALS PAGE 2I 365,461,375 167,060,145 5,192,663 5,085,278 26,799 11,494,617 67,389,032 349,846 38,650,665 56,109,225 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 13 of 48 358 IDAHO POWER COMPANY 359 3CP/12CP CLASS COST OF SERVICE STUDY 360 TWELVE MONTHS ENDING DECEMBER 31, 2023 361 *** TABLE 6 - ACCUMULATED DEFERRED INCOME TAXES ***ALLOCATION TO CLASSES 362 (K) (L) (M) (N) (O) (P) 363 FUNCTION ALLOCATION TOTALS UNMETERED MUNICIPAL TRAFFIC SC SC SC 364 FACTOR GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 365 (40) (41) (42) 366 367 DEMAND - Base-load Summer D10BS 127,470,124 29,578 0 5,912 394,050 378,678 1,623,252 368 DEMAND - Peak D10P 12,012,248 6,486 0 1,296 86,414 83,043 355,973 369 DEMAND - Base-load Non-Summer D10BNS 72,693,832 58,343 0 12,069 1,196,979 616,251 2,763,992 370 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 371 ENERGY - Summer E10S 0 0 0 0 0 0 0 372 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 373 374 TRANSMISSION 0 375 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 376 DEMAND - TRANSMISSION D13 86,357,660 58,352 0 11,916 1,034,555 665,903 2,934,576 377 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 378 DEMAND - DIRECT DA3509 5,068 0 0 0 0 0 0 379 380 DISTRIBUTION 381 SUBSTATIONS - GENERAL D20 25,205,345 22,813 47,396 2,384 0 0 0 382 SUBSTATIONS - DIRECT DA3602 350,573 0 0 0 0 26,401 324,083 383 LINES - PRIMARY DEMAND D20 33,343,743 30,179 62,700 3,154 0 0 0 384 LINES - PRIMARY CUSTOMER C20 16,525,627 45,880 82,214 21,133 0 0 0 385 LINES - SECONDARY DIRECT DA3647 2,131,934 0 0 0 0 289,652 0 386 LINE TRANS - PRIMARY DEMAND D50 7,642,983 6,918 14,372 723 0 0 0 387 LINE TRANS - PRIMARY CUST C50 3,787,970 10,516 18,845 4,844 0 0 0 388 LINE TRANS - SECOND DIRECT DA368 2,126,808 0 0 0 0 123,383 0 389 LINE TRANS - SECOND DEMAND D60 22,098,663 23,495 48,812 2,455 0 0 0 390 LINE TRANS - SECOND CUSTOMER C60 10,952,407 30,427 54,523 14,015 0 0 0 391 LINES - SECONDARY DEMAND D30 2,056,156 3,186 6,619 333 0 0 0 392 LINES - SECONDARY CUSTOMER C30 1,019,060 2,925 5,241 1,347 0 0 0 393 SERVICES CW369 4,198,735 0 0 0 0 252 0 394 METERS CW370 7,488,950 89 15,593 7,238 1,986 4,886 25,139 395 STREET LIGHTS DA373 400,190 0 399,337 0 0 0 0 396 INSTALL ON CUST PREMISES DA371 287,131 0 0 0 0 0 0 397 398 CUSTOMER ACCOUNTING 399 METER READING CW902 0 0 0 0 0 0 0 400 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 401 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 402 MISC C10 0 0 0 0 0 0 0 403 404 CONSUMER INFORMATION 405 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 406 SALES EXPENSE C10 0 0 0 0 0 0 0 407 ADVERTISING C10 0 0 0 0 0 0 0 408 MISC C10 0 0 0 0 0 0 0 409 410 MISCELLANEOUS 411 DEMAND D99U 0 0 0 0 0 0 0 412 ENERGY E99U 0 0 0 0 0 0 0 413 CUSTOMER C10 0 0 0 0 0 0 0 414 REVENUE R02 0 0 0 0 0 0 0 415 OTHER R01 0 0 0 0 0 0 0 416 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 417 418 TOTALS PAGE 2I 365,461,375 329,188 755,652 88,821 2,713,982 2,188,449 8,027,016 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 14 of 48 419 IDAHO POWER COMPANY PAGE 2J 420 3CP/12CP CLASS COST OF SERVICE STUDY 421 TWELVE MONTHS ENDING DECEMBER 31, 2023 422 *** TABLE 7 - ACQUISITION ADJUSTMENT ***ALLOCATION TO C TION TO CLASSES 423 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 424 FUNCTION ALLOCATION TOTALS RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 425 FACTOR RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING EC/PRIM/TRA SECONDARY 426 (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 427 DEMAND - BASE-LOAD TOTAL 0 428 DEMAND - Base-load Summer D10BS 0 0 0 0 0 0 0 0 0 0 429 DEMAND - Peak D10P 0 0 0 0 0 0 0 0 0 0 430 DEMAND - Base-load Non-Summer D10BNS 0 0 0 0 0 0 0 0 0 0 431 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 0 0 0 432 ENERGY - Summer E10S 0 0 0 0 0 0 0 0 0 0 433 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 0 0 0 434 0 435 TRANSMISSION 0 436 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 437 DEMAND - TRANSMISSION D13 628,247 267,673 7,023 5,597 25 21,946 130,853 0 78,393 82,507 438 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 439 DEMAND - DIRECT DA3509 0 0 0 0 0 0 0 0 0 0 440 0 441 DISTRIBUTION 0 442 SUBSTATIONS - GENERAL D20 0 0 0 0 0 0 0 0 0 0 443 SUBSTATIONS - DIRECT DA3602 0 0 0 0 0 0 0 0 0 0 444 LINES - PRIMARY DEMAND D20 0 0 0 0 0 0 0 0 0 0 445 LINES - PRIMARY CUSTOMER C20 0 0 0 0 0 0 0 0 0 0 446 LINES - SECONDARY DIRECT DA3647 0 0 0 0 0 0 0 0 0 0 447 LINE TRANS - PRIMARY DEMAND D50 0 0 0 0 0 0 0 0 0 0 448 LINE TRANS - PRIMARY CUST C50 0 0 0 0 0 0 0 0 0 0 449 LINE TRANS - SECOND DIRECT DA368 0 0 0 0 0 0 0 0 0 0 450 LINE TRANS - SECOND DEMAND D60 0 0 0 0 0 0 0 0 0 0 451 LINE TRANS - SECOND CUSTOMER C60 0 0 0 0 0 0 0 0 0 0 452 LINES - SECONDARY DEMAND D30 0 0 0 0 0 0 0 0 0 0 453 LINES - SECONDARY CUSTOMER C30 0 0 0 0 0 0 0 0 0 0 454 SERVICES CW369 0 0 0 0 0 0 0 0 0 0 455 METERS CW370 0 0 0 0 0 0 0 0 0 0 456 STREET LIGHTS DA373 0 0 0 0 0 0 0 0 0 0 457 INSTALL ON CUST PREMISES DA371 0 0 0 0 0 0 0 0 0 0 458 0 459 CUSTOMER ACCOUNTING 0 460 METER READING CW902 0 0 0 0 0 0 0 0 0 0 461 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 0 0 0 462 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 0 0 0 463 MISC C10 0 0 0 0 0 0 0 0 0 0 464 0 465 CONSUMER INFORMATION 0 466 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 0 0 0 467 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 468 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 469 MISC C10 0 0 0 0 0 0 0 0 0 0 470 0 471 MISCELLANEOUS 0 472 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 473 ENERGY E99U 0 0 0 0 0 0 0 0 0 0 474 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 475 REVENUE R02 0 0 0 0 0 0 0 0 0 0 476 OTHER R01 0 0 0 0 0 0 0 0 0 0 477 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 0 0 0 478 479 TOTALS PAGE 2J 628,247 267,673 7,023 5,597 25 21,946 130,853 0 78,393 82,507 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 15 of 48 419 IDAHO POWER COMPANY 420 3CP/12CP CLASS COST OF SERVICE STUDY 421 TWELVE MONTHS ENDING DECEMBER 31, 2023 422 *** TABLE 7 - ACQUISITION ADJUSTMENT ***ALLOCATION TO CLASSES 423 (K) (L) (M) (N) (O) (P) 424 FUNCTION ALLOCATION TOTALS UNMETERED MUNICIPAL TRAFFIC SC SC SC 425 FACTOR GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 426 (40) (41) (42) 427 DEMAND - BASE-LOAD TOTAL 428 DEMAND - Base-load Summer D10BS 0 0 0 0 0 0 0 429 DEMAND - Peak D10P 0 0 0 0 0 0 0 430 DEMAND - Base-load Non-Summer D10BNS 0 0 0 0 0 0 0 431 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 432 ENERGY - Summer E10S 0 0 0 0 0 0 0 433 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 434 435 TRANSMISSION 0 436 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 437 DEMAND - TRANSMISSION D13 628,247 425 0 87 7,526 4,844 21,349 438 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 439 DEMAND - DIRECT DA3509 0 0 0 0 0 0 0 440 441 DISTRIBUTION 442 SUBSTATIONS - GENERAL D20 0 0 0 0 0 0 0 443 SUBSTATIONS - DIRECT DA3602 0 0 0 0 0 0 0 444 LINES - PRIMARY DEMAND D20 0 0 0 0 0 0 0 445 LINES - PRIMARY CUSTOMER C20 0 0 0 0 0 0 0 446 LINES - SECONDARY DIRECT DA3647 0 0 0 0 0 0 0 447 LINE TRANS - PRIMARY DEMAND D50 0 0 0 0 0 0 0 448 LINE TRANS - PRIMARY CUST C50 0 0 0 0 0 0 0 449 LINE TRANS - SECOND DIRECT DA368 0 0 0 0 0 0 0 450 LINE TRANS - SECOND DEMAND D60 0 0 0 0 0 0 0 451 LINE TRANS - SECOND CUSTOMER C60 0 0 0 0 0 0 0 452 LINES - SECONDARY DEMAND D30 0 0 0 0 0 0 0 453 LINES - SECONDARY CUSTOMER C30 0 0 0 0 0 0 0 454 SERVICES CW369 0 0 0 0 0 0 0 455 METERS CW370 0 0 0 0 0 0 0 456 STREET LIGHTS DA373 0 0 0 0 0 0 0 457 INSTALL ON CUST PREMISES DA371 0 0 0 0 0 0 0 458 459 CUSTOMER ACCOUNTING 460 METER READING CW902 0 0 0 0 0 0 0 461 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 462 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 463 MISC C10 0 0 0 0 0 0 0 464 465 CONSUMER INFORMATION 466 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 467 SALES EXPENSE C10 0 0 0 0 0 0 0 468 ADVERTISING C10 0 0 0 0 0 0 0 469 MISC C10 0 0 0 0 0 0 0 470 471 MISCELLANEOUS 472 DEMAND D99U 0 0 0 0 0 0 0 473 ENERGY E99U 0 0 0 0 0 0 0 474 CUSTOMER C10 0 0 0 0 0 0 0 475 REVENUE R02 0 0 0 0 0 0 0 476 OTHER R01 0 0 0 0 0 0 0 477 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 478 479 TOTALS PAGE 2J 628,247 425 0 87 7,526 4,844 21,349 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 16 of 48 480 IDAHO POWER COMPANY PAGE 2K 481 3CP/12CP CLASS COST OF SERVICE STUDY 482 TWELVE MONTHS ENDING DECEMBER 31, 2023 483 *** TABLE 8 - WORKING CAPITAL ***ALLOCATION TO C TION TO CLASSES 484 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 485 FUNCTION ALLOCATION TOTALS RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 486 FACTOR RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING EC/PRIM/TRA SECONDARY 487 (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 488 DEMAND - BASE-LOAD TOTAL 15,553,944 489 DEMAND - Base-load Summer D10BS 6,683,820 2,758,920 67,538 50,954 178 196,598 1,161,793 0 672,226 1,478,925 490 DEMAND - Peak D10P 1,465,738 605,021 14,811 11,174 39 43,113 254,777 0 147,417 324,323 491 DEMAND - Base-load Non-Summer D10BNS 8,870,124 3,893,363 108,243 89,245 453 355,551 2,128,878 0 1,305,158 422,128 492 ENERGY - POWER SUPPLY E10 23,609,967 0 0 0 0 0 0 0 0 0 493 ENERGY - Summer E10S 0 2,703,345 68,296 69,967 256 318,420 1,744,491 2,625 1,197,327 2,264,967 494 ENERGY - Non-Summer E10NS 0 6,092,997 179,865 153,323 717 613,400 3,569,400 5,701 2,500,656 513,645 495 0 496 TRANSMISSION 0 497 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 498 DEMAND - TRANSMISSION D13 15,047,187 6,411,044 168,199 134,058 593 525,639 3,134,068 0 1,877,586 1,976,134 499 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 500 DEMAND - DIRECT DA3509 883 0 0 0 0 883 0 0 0 0 501 0 502 DISTRIBUTION 0 503 SUBSTATIONS - GENERAL D20 10,475,525 3,982,101 190,335 86,458 1,268 312,530 1,820,964 4,015 1,248,993 2,798,691 504 SUBSTATIONS - DIRECT DA3602 488,543 0 0 0 0 0 0 0 124 0 505 LINES - PRIMARY DEMAND D20 12,794,439 4,863,599 232,468 105,597 1,548 381,714 2,224,062 4,904 1,525,476 3,418,222 506 LINES - PRIMARY CUSTOMER C20 6,341,104 5,213,455 140,665 321,827 926 2,964 399,769 0 1,207 203,030 507 LINES - SECONDARY DIRECT DA3647 799,533 0 0 0 0 213,677 0 9,902 467,326 0 508 LINE TRANS - PRIMARY DEMAND D50 2,878,018 1,094,032 52,292 23,753 348 85,864 500,287 1,103 343,145 768,905 509 LINE TRANS - PRIMARY CUST C50 1,426,386 1,172,729 31,642 72,393 208 667 89,925 0 271 45,670 510 LINE TRANS - SECOND DIRECT DA368 797,611 0 0 0 0 315,674 0 0 435,665 0 511 LINE TRANS - SECOND DEMAND D60 8,323,578 3,716,711 177,650 80,696 1,183 0 1,699,605 3,748 3,657 2,612,170 512 LINE TRANS - SECOND CUSTOMER C60 4,125,282 3,393,904 91,572 209,506 603 0 260,245 0 7 132,170 513 LINES - SECONDARY DEMAND D30 819,944 533,580 25,504 11,585 170 0 243,999 538 525 0 514 LINES - SECONDARY CUSTOMER C30 406,376 345,395 9,319 21,321 61 0 26,485 0 1 0 515 SERVICES CW369 1,668,625 1,338,311 36,045 87,912 249 4,966 126,432 0 7,139 67,471 516 METERS CW370 2,808,623 1,679,061 44,740 158,966 366 69,419 509,842 13 48,180 277,434 517 STREET LIGHTS DA373 151,009 0 0 0 0 318 0 0 4 0 518 INSTALL ON CUST PREMISES DA371 107,778 0 0 0 0 86 0 107,630 62 0 519 0 520 CUSTOMER ACCOUNTING 0 521 METER READING CW902 0 0 0 0 0 0 0 0 0 0 522 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 0 0 0 523 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 (0) 0 0 524 MISC C10 0 0 0 0 0 0 0 0 0 0 525 0 526 CONSUMER INFORMATION 0 527 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 0 0 0 528 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 529 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 530 MISC C10 0 0 0 0 0 0 0 0 0 0 531 0 532 MISCELLANEOUS 0 533 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 534 ENERGY E99U 0 0 0 0 0 0 0 0 0 0 535 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 536 REVENUE R02 0 0 0 0 0 0 0 0 0 0 537 OTHER R01 0 0 0 0 0 0 0 0 0 0 538 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 0 0 0 539 540 TOTALS PAGE 2K 110,090,091 49,797,567 1,639,182 1,688,736 9,167 3,441,483 19,895,022 140,180 11,782,152 17,303,885 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 17 of 48 480 IDAHO POWER COMPANY 481 3CP/12CP CLASS COST OF SERVICE STUDY 482 TWELVE MONTHS ENDING DECEMBER 31, 2023 483 *** TABLE 8 - WORKING CAPITAL ***ALLOCATION TO CLASSES 484 (K) (L) (M) (N) (O) (P) 485 FUNCTION ALLOCATION TOTALS UNMETERED MUNICIPAL TRAFFIC SC SC SC 486 FACTOR GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 487 (40) (41) (42) 488 DEMAND - BASE-LOAD TOTAL 15,553,944 489 DEMAND - Base-load Summer D10BS 6,683,820 3,609 0 721 48,082 46,206 198,070 490 DEMAND - Peak D10P 1,465,738 791 0 158 10,544 10,133 43,436 491 DEMAND - Base-load Non-Summer D10BNS 8,870,124 7,119 0 1,473 146,056 75,195 337,263 492 ENERGY - POWER SUPPLY E10 23,609,967 0 0 0 0 0 0 493 ENERGY - Summer E10S 0 7,079 11,360 1,416 86,241 81,952 299,069 494 ENERGY - Non-Summer E10NS 0 15,019 26,387 3,107 276,237 184,975 617,726 495 496 TRANSMISSION 0 497 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 498 DEMAND - TRANSMISSION D13 15,047,187 10,167 0 2,076 180,264 116,029 511,328 499 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 500 DEMAND - DIRECT DA3509 883 0 0 0 0 0 0 501 502 DISTRIBUTION 503 SUBSTATIONS - GENERAL D20 10,475,525 9,481 19,698 991 0 0 0 504 SUBSTATIONS - DIRECT DA3602 488,543 0 0 0 0 36,791 451,628 505 LINES - PRIMARY DEMAND D20 12,794,439 11,580 24,059 1,210 0 0 0 506 LINES - PRIMARY CUSTOMER C20 6,341,104 17,605 31,547 8,109 0 0 0 507 LINES - SECONDARY DIRECT DA3647 799,533 0 0 0 0 108,627 0 508 LINE TRANS - PRIMARY DEMAND D50 2,878,018 2,605 5,412 272 0 0 0 509 LINE TRANS - PRIMARY CUST C50 1,426,386 3,960 7,096 1,824 0 0 0 510 LINE TRANS - SECOND DIRECT DA368 797,611 0 0 0 0 46,272 0 511 LINE TRANS - SECOND DEMAND D60 8,323,578 8,849 18,385 925 0 0 0 512 LINE TRANS - SECOND CUSTOMER C60 4,125,282 11,460 20,537 5,279 0 0 0 513 LINES - SECONDARY DEMAND D30 819,944 1,270 2,639 133 0 0 0 514 LINES - SECONDARY CUSTOMER C30 406,376 1,166 2,090 537 0 0 0 515 SERVICES CW369 1,668,625 0 0 0 0 100 0 516 METERS CW370 2,808,623 33 5,848 2,715 745 1,832 9,428 517 STREET LIGHTS DA373 151,009 0 150,687 0 0 0 0 518 INSTALL ON CUST PREMISES DA371 107,778 0 0 0 0 0 0 519 520 CUSTOMER ACCOUNTING 521 METER READING CW902 0 0 0 0 0 0 0 522 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 523 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 524 MISC C10 0 0 0 0 0 0 0 525 526 CONSUMER INFORMATION 527 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 528 SALES EXPENSE C10 0 0 0 0 0 0 0 529 ADVERTISING C10 0 0 0 0 0 0 0 530 MISC C10 0 0 0 0 0 0 0 531 532 MISCELLANEOUS 533 DEMAND D99U 0 0 0 0 0 0 0 534 ENERGY E99U 0 0 0 0 0 0 0 535 CUSTOMER C10 0 0 0 0 0 0 0 536 REVENUE R02 0 0 0 0 0 0 0 537 OTHER R01 0 0 0 0 0 0 0 538 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 539 540 TOTALS PAGE 2K 110,090,091 111,796 325,745 30,946 748,168 708,114 2,467,948 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 18 of 48 541 IDAHO POWER COMPANY PAGE 2L 542 3CP/12CP CLASS COST OF SERVICE STUDY 543 TWELVE MONTHS ENDING DECEMBER 31, 2023 544 *** TABLE 9 - DEFERRED PROGRAMS ***ALLOCATION TO C TION TO CLASSES 545 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 546 FUNCTION ALLOCATION TOTALS RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 547 FACTOR RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING EC/PRIM/TRA SECONDARY 548 (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 549 DEMAND - BASE-LOAD TOTAL 19,207,519 550 DEMAND - Base-load Summer D10BS 8,253,830 3,406,982 83,402 62,923 220 242,778 1,434,695 0 830,130 1,826,320 551 DEMAND - Peak D10P 6,539,110 2,699,187 66,075 49,851 175 192,341 1,136,639 0 657,672 1,446,905 552 DEMAND - Base-load Non-Summer D10BNS 10,953,690 4,807,902 133,669 110,209 559 439,069 2,628,945 0 1,611,736 521,285 553 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 0 0 0 554 ENERGY - Summer E10S 0 0 0 0 0 0 0 0 0 0 555 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 0 0 0 556 0 557 TRANSMISSION 0 558 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 559 DEMAND - TRANSMISSION D13 3,273,907 1,394,889 36,596 29,168 129 114,366 681,898 0 408,518 429,959 560 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 561 DEMAND - DIRECT DA3509 192 0 0 0 0 192 0 0 0 0 562 0 563 DISTRIBUTION 0 564 SUBSTATIONS - GENERAL D20 1,058,958 402,546 19,241 8,740 128 31,593 184,079 406 126,259 282,916 565 SUBSTATIONS - DIRECT DA3602 49,386 0 0 0 0 0 0 0 12 0 566 LINES - PRIMARY DEMAND D20 1,293,374 491,655 23,500 10,675 156 38,587 224,828 496 154,209 345,544 567 LINES - PRIMARY CUSTOMER C20 641,014 527,022 14,220 32,533 94 300 40,412 0 122 20,524 568 LINES - SECONDARY DIRECT DA3647 80,824 0 0 0 0 21,600 0 1,001 47,241 0 569 LINE TRANS - PRIMARY DEMAND D50 290,935 110,594 5,286 2,401 35 8,680 50,573 112 34,688 77,728 570 LINE TRANS - PRIMARY CUST C50 144,192 118,550 3,199 7,318 21 67 9,090 0 27 4,617 571 LINE TRANS - SECOND DIRECT DA368 80,629 0 0 0 0 31,911 0 0 44,041 0 572 LINE TRANS - SECOND DEMAND D60 841,420 375,718 17,958 8,157 120 0 171,811 379 370 264,061 573 LINE TRANS - SECOND CUSTOMER C60 417,020 343,086 9,257 21,179 61 0 26,308 0 1 13,361 574 LINES - SECONDARY DEMAND D30 82,887 53,939 2,578 1,171 17 0 24,666 54 53 0 575 LINES - SECONDARY CUSTOMER C30 41,080 34,916 942 2,155 6 0 2,677 0 0 0 576 SERVICES CW369 168,679 135,288 3,644 8,887 25 502 12,781 0 722 6,821 577 METERS CW370 283,920 169,734 4,523 16,070 37 7,018 51,539 1 4,870 28,045 578 STREET LIGHTS DA373 15,265 0 0 0 0 32 0 0 0 0 579 INSTALL ON CUST PREMISES DA371 10,895 0 0 0 0 9 0 10,880 6 0 580 0 581 CUSTOMER ACCOUNTING 0 582 METER READING CW902 0 0 0 0 0 0 0 0 0 0 583 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 0 0 0 584 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 0 0 0 585 MISC C10 0 0 0 0 0 0 0 0 0 0 586 0 587 CONSUMER INFORMATION 0 588 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 0 0 0 589 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 590 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 591 MISC C10 0 0 0 0 0 0 0 0 0 0 592 0 593 MISCELLANEOUS 0 594 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 595 ENERGY E99U 0 0 0 0 0 0 0 0 0 0 596 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 597 REVENUE R02 0 0 0 0 0 0 0 0 0 0 598 OTHER R01 0 0 0 0 0 0 0 0 0 0 599 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 0 0 0 600 601 TOTALS PAGE 2L 34,521,209 15,072,007 424,089 371,436 1,784 1,129,045 6,680,942 13,329 3,920,677 5,268,086 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 19 of 48 541 IDAHO POWER COMPANY 542 3CP/12CP CLASS COST OF SERVICE STUDY 543 TWELVE MONTHS ENDING DECEMBER 31, 2023 544 *** TABLE 9 - DEFERRED PROGRAMS ***ALLOCATION TO CLASSES 545 (K) (L) (M) (N) (O) (P) 546 FUNCTION ALLOCATION TOTALS UNMETERED MUNICIPAL TRAFFIC SC SC SC 547 FACTOR GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 548 (40) (41) (42) 549 DEMAND - BASE-LOAD TOTAL 19,207,519 550 DEMAND - Base-load Summer D10BS 8,253,830 4,457 0 891 59,376 57,060 244,596 551 DEMAND - Peak D10P 6,539,110 3,531 0 706 47,041 45,206 193,781 552 DEMAND - Base-load Non-Summer D10BNS 10,953,690 8,791 0 1,819 180,364 92,858 416,485 553 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 554 ENERGY - Summer E10S 0 0 0 0 0 0 0 555 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 556 557 TRANSMISSION 0 558 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 559 DEMAND - TRANSMISSION D13 3,273,907 2,212 0 452 39,221 25,245 111,253 560 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 561 DEMAND - DIRECT DA3509 192 0 0 0 0 0 0 562 563 DISTRIBUTION 564 SUBSTATIONS - GENERAL D20 1,058,958 958 1,991 100 0 0 0 565 SUBSTATIONS - DIRECT DA3602 49,386 0 0 0 0 3,719 45,655 566 LINES - PRIMARY DEMAND D20 1,293,374 1,171 2,432 122 0 0 0 567 LINES - PRIMARY CUSTOMER C20 641,014 1,780 3,189 820 0 0 0 568 LINES - SECONDARY DIRECT DA3647 80,824 0 0 0 0 10,981 0 569 LINE TRANS - PRIMARY DEMAND D50 290,935 263 547 28 0 0 0 570 LINE TRANS - PRIMARY CUST C50 144,192 400 717 184 0 0 0 571 LINE TRANS - SECOND DIRECT DA368 80,629 0 0 0 0 4,678 0 572 LINE TRANS - SECOND DEMAND D60 841,420 895 1,859 93 0 0 0 573 LINE TRANS - SECOND CUSTOMER C60 417,020 1,159 2,076 534 0 0 0 574 LINES - SECONDARY DEMAND D30 82,887 128 267 13 0 0 0 575 LINES - SECONDARY CUSTOMER C30 41,080 118 211 54 0 0 0 576 SERVICES CW369 168,679 0 0 0 0 10 0 577 METERS CW370 283,920 3 591 274 75 185 953 578 STREET LIGHTS DA373 15,265 0 15,233 0 0 0 0 579 INSTALL ON CUST PREMISES DA371 10,895 0 0 0 0 0 0 580 581 CUSTOMER ACCOUNTING 582 METER READING CW902 0 0 0 0 0 0 0 583 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 584 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 585 MISC C10 0 0 0 0 0 0 0 586 587 CONSUMER INFORMATION 588 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 589 SALES EXPENSE C10 0 0 0 0 0 0 0 590 ADVERTISING C10 0 0 0 0 0 0 0 591 MISC C10 0 0 0 0 0 0 0 592 593 MISCELLANEOUS 594 DEMAND D99U 0 0 0 0 0 0 0 595 ENERGY E99U 0 0 0 0 0 0 0 596 CUSTOMER C10 0 0 0 0 0 0 0 597 REVENUE R02 0 0 0 0 0 0 0 598 OTHER R01 0 0 0 0 0 0 0 599 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 600 601 TOTALS PAGE 2L 34,521,209 25,867 29,113 6,090 326,077 239,943 1,012,723 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 20 of 48 602 IDAHO POWER COMPANY PAGE 2M 603 3CP/12CP CLASS COST OF SERVICE STUDY 604 TWELVE MONTHS ENDING DECEMBER 31, 2023 605 *** TABLE 10 - SUBSIDIARY RATE BASE ***ALLOCATION TO C TION TO CLASSES 606 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 607 FUNCTION ALLOCATION TOTALS RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 608 FACTOR RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING EC/PRIM/TRA SECONDARY 609 (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 610 DEMAND - BASE-LOAD TOTAL 0 611 DEMAND - Base-load Summer D10BS 0 0 0 0 0 0 0 0 0 0 612 DEMAND - Peak D10P 0 0 0 0 0 0 0 0 0 0 613 DEMAND - Base-load Non-Summer D10BNS 0 0 0 0 0 0 0 0 0 0 614 ENERGY - POWER SUPPLY E10 29,980,646 0 0 0 0 0 0 0 0 0 615 ENERGY - Summer E10S 0 3,432,789 86,724 88,846 325 404,340 2,215,207 3,334 1,520,402 2,876,123 616 ENERGY - Non-Summer E10NS 0 7,737,071 228,397 194,694 910 778,914 4,532,532 7,240 3,175,408 652,242 617 0 618 TRANSMISSION 0 619 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 620 DEMAND - TRANSMISSION D13 0 0 0 0 0 0 0 0 0 0 621 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 622 DEMAND - DIRECT DA3509 0 0 0 0 0 0 0 0 0 0 623 0 624 DISTRIBUTION 0 625 SUBSTATIONS - GENERAL D20 0 0 0 0 0 0 0 0 0 0 626 SUBSTATIONS - DIRECT DA3602 0 0 0 0 0 0 0 0 0 0 627 LINES - PRIMARY DEMAND D20 0 0 0 0 0 0 0 0 0 0 628 LINES - PRIMARY CUSTOMER C20 0 0 0 0 0 0 0 0 0 0 629 LINES - SECONDARY DIRECT DA3647 0 0 0 0 0 0 0 0 0 0 630 LINE TRANS - PRIMARY DEMAND D50 0 0 0 0 0 0 0 0 0 0 631 LINE TRANS - PRIMARY CUST C50 0 0 0 0 0 0 0 0 0 0 632 LINE TRANS - SECOND DIRECT DA368 0 0 0 0 0 0 0 0 0 0 633 LINE TRANS - SECOND DEMAND D60 0 0 0 0 0 0 0 0 0 0 634 LINE TRANS - SECOND CUSTOMER C60 0 0 0 0 0 0 0 0 0 0 635 LINES - SECONDARY DEMAND D30 0 0 0 0 0 0 0 0 0 0 636 LINES - SECONDARY CUSTOMER C30 0 0 0 0 0 0 0 0 0 0 637 SERVICES CW369 0 0 0 0 0 0 0 0 0 0 638 METERS CW370 0 0 0 0 0 0 0 0 0 0 639 STREET LIGHTS DA373 0 0 0 0 0 0 0 0 0 0 640 INSTALL ON CUST PREMISES DA371 0 0 0 0 0 0 0 0 0 0 641 0 642 CUSTOMER ACCOUNTING 0 643 METER READING CW902 0 0 0 0 0 0 0 0 0 0 644 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 0 0 0 645 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 0 0 0 646 MISC C10 0 0 0 0 0 0 0 0 0 0 647 0 648 CONSUMER INFORMATION 0 649 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 0 0 0 650 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 651 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 652 MISC C10 0 0 0 0 0 0 0 0 0 0 653 0 654 MISCELLANEOUS 0 655 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 656 ENERGY E99U 0 0 0 0 0 0 0 0 0 0 657 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 658 REVENUE R02 0 0 0 0 0 0 0 0 0 0 659 OTHER R01 0 0 0 0 0 0 0 0 0 0 660 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 0 0 0 661 662 TOTALS PAGE 2M 29,980,646 11,169,860 315,122 283,541 1,236 1,183,254 6,747,739 10,573 4,695,810 3,528,365 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 21 of 48 602 IDAHO POWER COMPANY 603 3CP/12CP CLASS COST OF SERVICE STUDY 604 TWELVE MONTHS ENDING DECEMBER 31, 2023 605 *** TABLE 10 - SUBSIDIARY RATE BASE ***ALLOCATION TO CLASSES 606 (K) (L) (M) (N) (O) (P) 607 FUNCTION ALLOCATION TOTALS UNMETERED MUNICIPAL TRAFFIC SC SC SC 608 FACTOR GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 609 (40) (41) (42) 610 DEMAND - BASE-LOAD TOTAL 0 611 DEMAND - Base-load Summer D10BS 0 0 0 0 0 0 0 612 DEMAND - Peak D10P 0 0 0 0 0 0 0 613 DEMAND - Base-load Non-Summer D10BNS 0 0 0 0 0 0 0 614 ENERGY - POWER SUPPLY E10 29,980,646 0 0 0 0 0 0 615 ENERGY - Summer E10S 0 8,989 14,426 1,798 109,511 104,065 379,766 616 ENERGY - Non-Summer E10NS 0 19,072 33,507 3,945 350,774 234,887 784,408 617 618 TRANSMISSION 0 619 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 620 DEMAND - TRANSMISSION D13 0 0 0 0 0 0 0 621 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 622 DEMAND - DIRECT DA3509 0 0 0 0 0 0 0 623 624 DISTRIBUTION 625 SUBSTATIONS - GENERAL D20 0 0 0 0 0 0 0 626 SUBSTATIONS - DIRECT DA3602 0 0 0 0 0 0 0 627 LINES - PRIMARY DEMAND D20 0 0 0 0 0 0 0 628 LINES - PRIMARY CUSTOMER C20 0 0 0 0 0 0 0 629 LINES - SECONDARY DIRECT DA3647 0 0 0 0 0 0 0 630 LINE TRANS - PRIMARY DEMAND D50 0 0 0 0 0 0 0 631 LINE TRANS - PRIMARY CUST C50 0 0 0 0 0 0 0 632 LINE TRANS - SECOND DIRECT DA368 0 0 0 0 0 0 0 633 LINE TRANS - SECOND DEMAND D60 0 0 0 0 0 0 0 634 LINE TRANS - SECOND CUSTOMER C60 0 0 0 0 0 0 0 635 LINES - SECONDARY DEMAND D30 0 0 0 0 0 0 0 636 LINES - SECONDARY CUSTOMER C30 0 0 0 0 0 0 0 637 SERVICES CW369 0 0 0 0 0 0 0 638 METERS CW370 0 0 0 0 0 0 0 639 STREET LIGHTS DA373 0 0 0 0 0 0 0 640 INSTALL ON CUST PREMISES DA371 0 0 0 0 0 0 0 641 642 CUSTOMER ACCOUNTING 643 METER READING CW902 0 0 0 0 0 0 0 644 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 645 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 646 MISC C10 0 0 0 0 0 0 0 647 648 CONSUMER INFORMATION 649 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 650 SALES EXPENSE C10 0 0 0 0 0 0 0 651 ADVERTISING C10 0 0 0 0 0 0 0 652 MISC C10 0 0 0 0 0 0 0 653 654 MISCELLANEOUS 655 DEMAND D99U 0 0 0 0 0 0 0 656 ENERGY E99U 0 0 0 0 0 0 0 657 CUSTOMER C10 0 0 0 0 0 0 0 658 REVENUE R02 0 0 0 0 0 0 0 659 OTHER R01 0 0 0 0 0 0 0 660 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 661 662 TOTALS PAGE 2M 29,980,646 28,061 47,932 5,743 460,286 338,953 1,164,174 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 22 of 48 663 IDAHO POWER COMPANY PAGE 2N 664 3CP/12CP CLASS COST OF SERVICE STUDY 665 TWELVE MONTHS ENDING DECEMBER 31, 2023 666 *** TABLE 11 - PLANT HELD FOR FUTURE USE ***ALLOCATION TO C TION TO CLASSES 667 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 668 FUNCTION ALLOCATION TOTALS RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 669 FACTOR RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING EC/PRIM/TRA SECONDARY 670 (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 671 DEMAND - BASE-LOAD TOTAL 0 672 DEMAND - Base-load Summer D10BS 0 0 0 0 0 0 0 0 0 0 673 DEMAND - Peak D10P 0 0 0 0 0 0 0 0 0 0 674 DEMAND - Base-load Non-Summer D10BNS 0 0 0 0 0 0 0 0 0 0 675 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 0 0 0 676 ENERGY - Summer E10S 0 0 0 0 0 0 0 0 0 0 677 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 0 0 0 678 0 679 TRANSMISSION 0 680 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 681 DEMAND - TRANSMISSION D13 2,640,221 1,124,900 29,513 23,522 104 92,230 549,912 0 329,447 346,738 682 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 683 DEMAND - DIRECT DA3509 0 0 0 0 0 0 0 0 0 0 684 0 685 DISTRIBUTION 0 686 SUBSTATIONS - GENERAL D20 5,316,573 2,021,009 96,599 43,880 643 158,616 924,182 2,038 633,893 1,420,401 687 SUBSTATIONS - DIRECT DA3602 30 0 0 0 0 0 0 0 0 0 688 LINES - PRIMARY DEMAND D20 0 0 0 0 0 0 0 0 0 0 689 LINES - PRIMARY CUSTOMER C20 0 0 0 0 0 0 0 0 0 0 690 LINES - SECONDARY DIRECT DA3647 0 0 0 0 0 0 0 0 0 0 691 LINE TRANS - PRIMARY DEMAND D50 0 0 0 0 0 0 0 0 0 0 692 LINE TRANS - PRIMARY CUST C50 0 0 0 0 0 0 0 0 0 0 693 LINE TRANS - SECOND DIRECT DA368 0 0 0 0 0 0 0 0 0 0 694 LINE TRANS - SECOND DEMAND D60 0 0 0 0 0 0 0 0 0 0 695 LINE TRANS - SECOND CUSTOMER C60 0 0 0 0 0 0 0 0 0 0 696 LINES - SECONDARY DEMAND D30 0 0 0 0 0 0 0 0 0 0 697 LINES - SECONDARY CUSTOMER C30 0 0 0 0 0 0 0 0 0 0 698 SERVICES CW369 0 0 0 0 0 0 0 0 0 0 699 METERS CW370 0 0 0 0 0 0 0 0 0 0 700 STREET LIGHTS DA373 0 0 0 0 0 0 0 0 0 0 701 INSTALL ON CUST PREMISES DA371 0 0 0 0 0 0 0 0 0 0 702 0 703 CUSTOMER ACCOUNTING 0 704 METER READING CW902 0 0 0 0 0 0 0 0 0 0 705 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 0 0 0 706 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 0 0 0 707 MISC C10 0 0 0 0 0 0 0 0 0 0 708 0 709 CONSUMER INFORMATION 0 710 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 0 0 0 711 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 712 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 713 MISC C10 0 0 0 0 0 0 0 0 0 0 714 0 715 MISCELLANEOUS 0 716 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 717 ENERGY E99U 0 0 0 0 0 0 0 0 0 0 718 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 719 REVENUE R02 0 0 0 0 0 0 0 0 0 0 720 OTHER R01 0 0 0 0 0 0 0 0 0 0 721 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 0 0 0 722 723 TOTALS PAGE 2N 7,956,825 3,145,909 126,112 67,402 747 250,847 1,474,094 2,038 963,340 1,767,139 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 23 of 48 663 IDAHO POWER COMPANY 664 3CP/12CP CLASS COST OF SERVICE STUDY 665 TWELVE MONTHS ENDING DECEMBER 31, 2023 666 *** TABLE 11 - PLANT HELD FOR FUTURE USE ***ALLOCATION TO CLASSES 667 (K) (L) (M) (N) (O) (P) 668 FUNCTION ALLOCATION TOTALS UNMETERED MUNICIPAL TRAFFIC SC SC SC 669 FACTOR GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 670 (40) (41) (42) 671 DEMAND - BASE-LOAD TOTAL 0 672 DEMAND - Base-load Summer D10BS 0 0 0 0 0 0 0 673 DEMAND - Peak D10P 0 0 0 0 0 0 0 674 DEMAND - Base-load Non-Summer D10BNS 0 0 0 0 0 0 0 675 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 676 ENERGY - Summer E10S 0 0 0 0 0 0 0 677 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 678 679 TRANSMISSION 0 680 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 681 DEMAND - TRANSMISSION D13 2,640,221 1,784 0 364 31,630 20,359 89,719 682 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 683 DEMAND - DIRECT DA3509 0 0 0 0 0 0 0 684 685 DISTRIBUTION 686 SUBSTATIONS - GENERAL D20 5,316,573 4,812 9,997 503 0 0 0 687 SUBSTATIONS - DIRECT DA3602 30 0 0 0 0 2 28 688 LINES - PRIMARY DEMAND D20 0 0 0 0 0 0 0 689 LINES - PRIMARY CUSTOMER C20 0 0 0 0 0 0 0 690 LINES - SECONDARY DIRECT DA3647 0 0 0 0 0 0 0 691 LINE TRANS - PRIMARY DEMAND D50 0 0 0 0 0 0 0 692 LINE TRANS - PRIMARY CUST C50 0 0 0 0 0 0 0 693 LINE TRANS - SECOND DIRECT DA368 0 0 0 0 0 0 0 694 LINE TRANS - SECOND DEMAND D60 0 0 0 0 0 0 0 695 LINE TRANS - SECOND CUSTOMER C60 0 0 0 0 0 0 0 696 LINES - SECONDARY DEMAND D30 0 0 0 0 0 0 0 697 LINES - SECONDARY CUSTOMER C30 0 0 0 0 0 0 0 698 SERVICES CW369 0 0 0 0 0 0 0 699 METERS CW370 0 0 0 0 0 0 0 700 STREET LIGHTS DA373 0 0 0 0 0 0 0 701 INSTALL ON CUST PREMISES DA371 0 0 0 0 0 0 0 702 703 CUSTOMER ACCOUNTING 704 METER READING CW902 0 0 0 0 0 0 0 705 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 706 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 707 MISC C10 0 0 0 0 0 0 0 708 709 CONSUMER INFORMATION 710 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 711 SALES EXPENSE C10 0 0 0 0 0 0 0 712 ADVERTISING C10 0 0 0 0 0 0 0 713 MISC C10 0 0 0 0 0 0 0 714 715 MISCELLANEOUS 716 DEMAND D99U 0 0 0 0 0 0 0 717 ENERGY E99U 0 0 0 0 0 0 0 718 CUSTOMER C10 0 0 0 0 0 0 0 719 REVENUE R02 0 0 0 0 0 0 0 720 OTHER R01 0 0 0 0 0 0 0 721 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 722 723 TOTALS PAGE 2N 7,956,825 6,596 9,997 867 31,630 20,361 89,747 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 24 of 48 724 IDAHO POWER COMPANY PAGE 4C 725 3CP/12CP CLASS COST OF SERVICE STUDY 726 TWELVE MONTHS ENDING DECEMBER 31, 2023 727 *** TABLE 12 - OTHER REVENUES ***ALLOCATION TO C TION TO CLASSES 728 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 729 FUNCTION ALLOCATION TOTALS RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 730 FACTOR RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING EC/PRIM/TRA SECONDARY 731 (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 732 DEMAND - BASE-LOAD TOTAL 1,105,981 733 DEMAND - Base-load Summer D10BS 475,261 196,176 4,802 3,623 13 13,979 82,611 0 47,799 105,161 734 DEMAND - Peak D10P 2,661 1,098 27 20 0 78 463 0 268 589 735 DEMAND - Base-load Non-Summer D10BNS 630,720 276,842 7,697 6,346 32 25,282 151,376 0 92,805 30,016 736 ENERGY - POWER SUPPLY E10 29,557,875 0 0 0 0 0 0 0 0 0 737 ENERGY - Summer E10S 0 3,384,382 85,501 87,593 321 398,638 2,183,969 3,287 1,498,962 2,835,565 738 ENERGY - Non-Summer E10NS 0 7,627,967 225,177 191,949 898 767,931 4,468,617 7,138 3,130,630 643,045 739 0 740 TRANSMISSION 0 741 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 742 DEMAND - TRANSMISSION D13 60,109,852 25,610,564 671,916 535,531 2,369 2,099,800 12,519,841 0 7,500,501 7,894,173 743 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 744 DEMAND - DIRECT DA3509 518 0 0 0 0 518 0 0 0 0 745 0 746 DISTRIBUTION 0 747 SUBSTATIONS - GENERAL D20 299,274 113,764 5,438 2,470 36 8,929 52,023 115 35,682 79,955 748 SUBSTATIONS - DIRECT DA3602 13,957 0 0 0 0 0 0 0 4 0 749 LINES - PRIMARY DEMAND D20 2,502,919 951,444 45,477 20,657 303 74,673 435,083 959 298,422 668,692 750 LINES - PRIMARY CUSTOMER C20 1,240,482 1,019,885 27,518 62,958 181 580 78,205 0 236 39,718 751 LINES - SECONDARY DIRECT DA3647 107,956 0 0 0 0 28,852 0 1,337 63,100 0 752 LINE TRANS - PRIMARY DEMAND D50 350,797 133,350 6,374 2,895 42 10,466 60,979 134 41,825 93,721 753 LINE TRANS - PRIMARY CUST C50 173,860 142,942 3,857 8,824 25 81 10,961 0 33 5,567 754 LINE TRANS - SECOND DIRECT DA368 97,220 0 0 0 0 38,477 0 0 53,103 0 755 LINE TRANS - SECOND DEMAND D60 1,014,549 453,024 21,653 9,836 144 0 207,162 457 446 318,394 756 LINE TRANS - SECOND CUSTOMER C60 502,825 413,678 11,162 25,536 73 0 31,721 0 1 16,110 757 LINES - SECONDARY DEMAND D30 156,826 102,055 4,878 2,216 32 0 46,668 103 100 0 758 LINES - SECONDARY CUSTOMER C30 77,725 66,062 1,782 4,078 12 0 5,066 0 0 0 759 SERVICES CW369 203,386 163,125 4,393 10,715 30 605 15,411 0 870 8,224 760 METERS CW370 80,239 47,969 1,278 4,541 10 1,983 14,566 0 1,376 7,926 761 STREET LIGHTS DA373 18,406 0 0 0 0 39 0 0 0 0 762 INSTALL ON CUST PREMISES DA371 13,137 0 0 0 0 10 0 13,119 8 0 763 0 764 CUSTOMER ACCOUNTING 0 765 METER READING CW902 0 0 0 0 0 0 0 0 0 0 766 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 0 0 0 767 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 0 0 0 768 MISC C10 0 0 0 0 0 0 0 0 0 0 769 0 770 CONSUMER INFORMATION 0 771 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 0 0 0 772 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 773 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 774 MISC C10 0 0 0 0 0 0 0 0 0 0 775 0 776 MISCELLANEOUS 0 777 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 778 ENERGY E99U 0 0 0 0 0 0 0 0 0 0 779 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 780 MISC. REVENUE R02 6,150,427 5,495,771 29,596 193,701 159 1,918 195,532 11,086 40 113,760 781 FACILITIES CHARGE REVENUE DA454 9,859,316 0 0 0 0 3,309,023 0 74,734 5,557,903 0 782 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 0 0 0 783 784 TOTALS PAGE 4C 113,640,190 46,200,098 1,158,525 1,173,490 4,682 6,781,861 20,560,253 112,468 18,324,115 12,860,615 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 25 of 48 724 IDAHO POWER COMPANY 725 3CP/12CP CLASS COST OF SERVICE STUDY 726 TWELVE MONTHS ENDING DECEMBER 31, 2023 727 *** TABLE 12 - OTHER REVENUES ***ALLOCATION TO CLASSES 728 (K) (L) (M) (N) (O) (P) 729 FUNCTION ALLOCATION TOTALS UNMETERED MUNICIPAL TRAFFIC SC SC SC 730 FACTOR GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 731 (40) (41) (42) 732 DEMAND - BASE-LOAD TOTAL 1,105,981 733 DEMAND - Base-load Summer D10BS 475,261 257 0 51 3,419 3,286 14,084 734 DEMAND - Peak D10P 2,661 1 0 0 19 18 79 735 DEMAND - Base-load Non-Summer D10BNS 630,720 506 0 105 10,385 5,347 23,981 736 ENERGY - POWER SUPPLY E10 29,557,875 0 0 0 0 0 0 737 ENERGY - Summer E10S 0 8,862 14,222 1,773 107,967 102,598 374,411 738 ENERGY - Non-Summer E10NS 0 18,803 33,034 3,889 345,828 231,575 773,346 739 740 TRANSMISSION 0 741 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 742 DEMAND - TRANSMISSION D13 60,109,852 40,617 0 8,294 720,109 463,506 2,042,632 743 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 744 DEMAND - DIRECT DA3509 518 0 0 0 0 0 0 745 746 DISTRIBUTION 747 SUBSTATIONS - GENERAL D20 299,274 271 563 28 0 0 0 748 SUBSTATIONS - DIRECT DA3602 13,957 0 0 0 0 1,051 12,903 749 LINES - PRIMARY DEMAND D20 2,502,919 2,265 4,706 237 0 0 0 750 LINES - PRIMARY CUSTOMER C20 1,240,482 3,444 6,171 1,586 0 0 0 751 LINES - SECONDARY DIRECT DA3647 107,956 0 0 0 0 14,667 0 752 LINE TRANS - PRIMARY DEMAND D50 350,797 318 660 33 0 0 0 753 LINE TRANS - PRIMARY CUST C50 173,860 483 865 222 0 0 0 754 LINE TRANS - SECOND DIRECT DA368 97,220 0 0 0 0 5,640 0 755 LINE TRANS - SECOND DEMAND D60 1,014,549 1,079 2,241 113 0 0 0 756 LINE TRANS - SECOND CUSTOMER C60 502,825 1,397 2,503 643 0 0 0 757 LINES - SECONDARY DEMAND D30 156,826 243 505 25 0 0 0 758 LINES - SECONDARY CUSTOMER C30 77,725 223 400 103 0 0 0 759 SERVICES CW369 203,386 0 0 0 0 12 0 760 METERS CW370 80,239 1 167 78 21 52 269 761 STREET LIGHTS DA373 18,406 0 18,367 0 0 0 0 762 INSTALL ON CUST PREMISES DA371 13,137 0 0 0 0 0 0 763 764 CUSTOMER ACCOUNTING 765 METER READING CW902 0 0 0 0 0 0 0 766 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 767 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 768 MISC C10 0 0 0 0 0 0 0 769 770 CONSUMER INFORMATION 771 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 772 SALES EXPENSE C10 0 0 0 0 0 0 0 773 ADVERTISING C10 0 0 0 0 0 0 0 774 MISC C10 0 0 0 0 0 0 0 775 776 MISCELLANEOUS 777 DEMAND D99U 0 0 0 0 0 0 0 778 ENERGY E99U 0 0 0 0 0 0 0 779 CUSTOMER C10 0 0 0 0 0 0 0 780 MISC. REVENUE R02 6,150,427 15,092 91,849 1,924 0 0 0 781 FACILITIES CHARGE REVENUE DA454 9,859,316 0 681 0 0 916,976 0 782 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 783 784 TOTALS PAGE 4C 113,640,190 93,861 176,934 19,105 1,187,749 1,744,729 3,241,706 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 26 of 48 785 IDAHO POWER COMPANY PAGE 3C 786 3CP/12CP CLASS COST OF SERVICE STUDY 787 TWELVE MONTHS ENDING DECEMBER 31, 2023 788 *** TABLE 13 - OPERATION & MAINTENANCE EXPENSES ***ALLOCATION TO C TION TO CLASSES 789 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 790 FUNCTION ALLOCATION TOTALS RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 791 FACTOR RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING EC/PRIM/TRA SECONDARY 792 (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 793 DEMAND - BASE-LOAD TOTAL 138,136,693 794 DEMAND - Base-load Summer D10BS 59,359,916 24,502,340 599,811 452,529 1,585 1,746,011 10,318,043 0 5,970,128 13,134,536 795 DEMAND - Peak D10P 16,516,367 6,817,557 166,892 125,912 441 485,812 2,870,903 0 1,661,135 3,654,567 796 DEMAND - Base-load Non-Summer D10BNS 78,776,777 34,577,482 961,321 792,598 4,023 3,157,695 18,906,853 0 11,591,285 3,748,978 797 ENERGY - POWER SUPPLY E10 492,817,416 0 0 0 0 0 0 0 0 0 798 ENERGY - Summer E10S 0 56,427,674 1,425,561 1,460,441 5,347 6,646,475 36,413,240 54,800 24,992,144 47,277,280 799 ENERGY - Non-Summer E10NS 0 127,180,821 3,754,364 3,200,359 14,966 12,803,679 74,505,086 119,005 52,196,879 10,721,459 800 0 801 TRANSMISSION 0 802 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 803 DEMAND - TRANSMISSION D13 48,778,156 20,782,551 545,249 434,575 1,922 1,703,953 10,159,645 0 6,086,533 6,405,992 804 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 805 DEMAND - DIRECT DA3509 3,521 0 0 0 0 3,521 0 0 0 0 806 0 807 DISTRIBUTION 0 808 SUBSTATIONS - GENERAL D20 17,911,499 6,808,766 325,442 147,830 2,167 534,378 3,113,562 6,866 2,135,582 4,785,320 809 SUBSTATIONS - DIRECT DA3602 814,448 0 0 0 0 0 0 0 206 0 810 LINES - PRIMARY DEMAND D20 47,352,090 18,000,129 860,362 390,814 5,730 1,412,718 8,231,230 18,150 5,645,773 12,650,806 811 LINES - PRIMARY CUSTOMER C20 23,468,360 19,294,945 520,601 1,191,078 3,428 10,970 1,479,540 0 4,466 751,412 812 LINES - SECONDARY DIRECT DA3647 1,634,918 0 0 0 0 436,936 0 20,248 955,609 0 813 LINE TRANS - PRIMARY DEMAND D50 1,990,925 756,818 36,174 16,432 241 59,398 346,083 763 237,377 531,905 814 LINE TRANS - PRIMARY CUST C50 986,730 811,259 21,889 50,079 144 461 62,207 0 188 31,593 815 LINE TRANS - SECOND DIRECT DA368 551,763 0 0 0 0 218,373 0 0 301,380 0 816 LINE TRANS - SECOND DEMAND D60 5,757,998 2,571,107 122,893 55,823 818 0 1,175,735 2,593 2,530 1,807,019 817 LINE TRANS - SECOND CUSTOMER C60 2,853,745 2,347,799 63,346 144,930 417 0 180,030 0 5 91,431 818 LINES - SECONDARY DEMAND D30 3,301,093 2,148,193 102,678 46,641 684 0 982,341 2,166 2,114 0 819 LINES - SECONDARY CUSTOMER C30 1,636,068 1,390,559 37,519 85,839 247 0 106,628 0 3 0 820 SERVICES CW369 1,141,837 915,804 24,666 60,158 170 3,398 86,517 0 4,885 46,171 821 METERS CW370 18,706,555 11,183,224 297,988 1,058,780 2,436 462,361 3,395,752 84 320,899 1,847,820 822 STREET LIGHTS DA373 554,840 0 0 0 0 1,168 0 0 14 0 823 INSTALL ON CUST PREMISES CWINSTAL 2,894,436 2,057,683 55,519 127,021 366 1,187 157,784 391,659 485 80,133 824 0 825 CUSTOMER ACCOUNTING 0 826 METER READING CW902 3,681,466 2,818,451 55,951 220,902 536 104,762 238,482 0 42,766 194,122 827 CUSTOMER ACCOUNTS CW903 32,460,816 26,554,621 716,476 1,639,218 4,718 129,538 2,036,213 0 52,881 1,034,129 828 UNCOLLECTIBLES CW904 5,388,730 4,833,086 2,063 205,622 0 1,916 254,688 (3) 25,816 65,542 829 MISC C10 0 0 0 0 0 0 0 0 0 0 830 0 831 CONSUMER INFORMATION 0 832 CUSTOMER ASSIST C10 19,150,720 15,744,877 424,816 971,932 2,797 9,085 1,207,320 0 3,709 613,160 833 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 834 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 835 MISC C10 0 0 0 0 0 0 0 0 0 0 836 0 837 MISCELLANEOUS 0 838 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 839 ENERGY E99U 0 0 0 0 0 0 0 0 0 0 840 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 841 REVENUE R02 0 0 0 0 0 0 0 0 0 0 842 OTHER INTFUND 332,773 212,346 5,770 8,754 26 2,878 16,293 26 11,394 75,286 843 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 0 0 0 844 845 TOTALS PAGE 3C 888,823,963 388,738,091 11,127,348 12,888,267 53,211 29,936,675 176,244,175 616,357 112,246,184 109,548,662 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 27 of 48 785 IDAHO POWER COMPANY 786 3CP/12CP CLASS COST OF SERVICE STUDY 787 TWELVE MONTHS ENDING DECEMBER 31, 2023 788 *** TABLE 13 - OPERATION & MAINTENANCE EXPENSES ***ALLOCATION TO CLASSES 789 (K) (L) (M) (N) (O) (P) 790 FUNCTION ALLOCATION TOTALS UNMETERED MUNICIPAL TRAFFIC SC SC SC 791 FACTOR GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 792 (40) (41) (42) 793 DEMAND - BASE-LOAD TOTAL 138,136,693 794 DEMAND - Base-load Summer D10BS 59,359,916 32,053 0 6,407 427,023 410,366 1,759,084 795 DEMAND - Peak D10P 16,516,367 8,919 0 1,783 118,815 114,181 489,449 796 DEMAND - Base-load Non-Summer D10BNS 78,776,777 63,226 0 13,079 1,297,140 667,818 2,995,280 797 ENERGY - POWER SUPPLY E10 492,817,416 0 0 0 0 0 0 798 ENERGY - Summer E10S 0 147,761 237,125 29,555 1,800,130 1,710,612 6,242,542 799 ENERGY - Non-Summer E10NS 0 313,495 550,779 64,846 5,765,976 3,861,040 12,893,976 800 801 TRANSMISSION 0 802 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 803 DEMAND - TRANSMISSION D13 48,778,156 32,960 0 6,730 584,357 376,128 1,657,563 804 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 805 DEMAND - DIRECT DA3509 3,521 0 0 0 0 0 0 806 807 DISTRIBUTION 808 SUBSTATIONS - GENERAL D20 17,911,499 16,211 33,681 1,694 0 0 0 809 SUBSTATIONS - DIRECT DA3602 814,448 0 0 0 0 61,335 752,907 810 LINES - PRIMARY DEMAND D20 47,352,090 42,858 89,041 4,479 0 0 0 811 LINES - PRIMARY CUSTOMER C20 23,468,360 65,155 116,754 30,011 0 0 0 812 LINES - SECONDARY DIRECT DA3647 1,634,918 0 0 0 0 222,126 0 813 LINE TRANS - PRIMARY DEMAND D50 1,990,925 1,802 3,744 188 0 0 0 814 LINE TRANS - PRIMARY CUST C50 986,730 2,739 4,909 1,262 0 0 0 815 LINE TRANS - SECOND DIRECT DA368 551,763 0 0 0 0 32,010 0 816 LINE TRANS - SECOND DEMAND D60 5,757,998 6,122 12,718 640 0 0 0 817 LINE TRANS - SECOND CUSTOMER C60 2,853,745 7,928 14,207 3,652 0 0 0 818 LINES - SECONDARY DEMAND D30 3,301,093 5,115 10,626 535 0 0 0 819 LINES - SECONDARY CUSTOMER C30 1,636,068 4,696 8,414 2,163 0 0 0 820 SERVICES CW369 1,141,837 0 0 0 0 69 0 821 METERS CW370 18,706,555 223 38,949 18,080 4,960 12,205 62,794 822 STREET LIGHTS DA373 554,840 0 553,658 0 0 0 0 823 INSTALL ON CUST PREMISES CWINSTAL 2,894,436 6,948 12,451 3,201 0 0 0 824 825 CUSTOMER ACCOUNTING 826 METER READING CW902 3,681,466 0 4,387 0 369 369 369 827 CUSTOMER ACCOUNTS CW903 32,460,816 89,669 160,682 41,303 456 456 456 828 UNCOLLECTIBLES CW904 5,388,730 0 0 0 0 0 0 829 MISC C10 0 0 0 0 0 0 0 830 831 CONSUMER INFORMATION 832 CUSTOMER ASSIST C10 19,150,720 53,167 95,272 24,489 32 32 32 833 SALES EXPENSE C10 0 0 0 0 0 0 0 834 ADVERTISING C10 0 0 0 0 0 0 0 835 MISC C10 0 0 0 0 0 0 0 836 837 MISCELLANEOUS 838 DEMAND D99U 0 0 0 0 0 0 0 839 ENERGY E99U 0 0 0 0 0 0 0 840 CUSTOMER C10 0 0 0 0 0 0 0 841 REVENUE R02 0 0 0 0 0 0 0 842 OTHER INTFUND 332,773 0 0 0 0 0 0 843 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 844 845 TOTALS PAGE 3C 888,823,963 901,046 1,947,396 254,097 9,999,258 7,468,743 26,854,451 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 28 of 48 846 IDAHO POWER COMPANY PAGE 3D 847 3CP/12CP CLASS COST OF SERVICE STUDY 848 TWELVE MONTHS ENDING DECEMBER 31, 2023 849 *** TABLE 14 - DEPRECIATION EXPENSE ***ALLOCATION TO C TION TO CLASSES 850 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 851 FUNCTION ALLOCATION TOTALS RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 852 FACTOR RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING EC/PRIM/TRA SECONDARY 853 (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 854 DEMAND - BASE-LOAD TOTAL 61,229,781 855 DEMAND - Base-load Summer D10BS 26,311,580 10,860,785 265,869 200,586 702 773,928 4,573,524 0 2,646,289 5,821,949 856 DEMAND - Peak D10P 6,492,310 2,679,869 65,602 49,494 173 190,965 1,128,504 0 652,965 1,436,550 857 DEMAND - Base-load Non-Summer D10BNS 34,918,201 15,326,642 426,110 351,323 1,783 1,399,664 8,380,557 0 5,137,895 1,661,753 858 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 0 0 0 859 ENERGY - Summer E10S 0 0 0 0 0 0 0 0 0 0 860 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 0 0 0 861 0 862 TRANSMISSION 0 863 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 864 DEMAND - TRANSMISSION D13 28,824,414 12,281,007 322,203 256,803 1,136 1,006,915 6,003,626 0 3,596,707 3,785,485 865 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 866 DEMAND - DIRECT DA3509 1,909 0 0 0 0 1,909 0 0 0 0 867 0 868 DISTRIBUTION 0 869 SUBSTATIONS - GENERAL D20 9,040,007 3,436,412 164,252 74,610 1,094 269,703 1,571,428 3,465 1,077,837 2,415,171 870 SUBSTATIONS - DIRECT DA3602 145,538 0 0 0 0 0 0 0 37 0 871 LINES - PRIMARY DEMAND D20 12,917,578 4,910,408 234,705 106,613 1,563 385,387 2,245,467 4,951 1,540,158 3,451,121 872 LINES - PRIMARY CUSTOMER C20 6,402,133 5,263,632 142,019 324,924 935 2,993 403,616 0 1,218 204,984 873 LINES - SECONDARY DIRECT DA3647 849,132 0 0 0 0 226,933 0 10,516 496,317 0 874 LINE TRANS - PRIMARY DEMAND D50 2,620,571 996,168 47,614 21,629 317 78,183 455,535 1,004 312,450 700,124 875 LINE TRANS - PRIMARY CUST C50 1,298,792 1,067,826 28,811 65,917 190 607 81,881 0 247 41,585 876 LINE TRANS - SECOND DIRECT DA368 726,262 0 0 0 0 287,436 0 0 396,693 0 877 LINE TRANS - SECOND DEMAND D60 7,579,012 3,384,241 161,758 73,478 1,077 0 1,547,570 3,413 3,330 2,378,504 878 LINE TRANS - SECOND CUSTOMER C60 3,756,265 3,090,310 83,380 190,765 549 0 236,966 0 6 120,347 879 LINES - SECONDARY DEMAND D30 831,250 540,938 25,855 11,745 172 0 247,364 545 532 0 880 LINES - SECONDARY CUSTOMER C30 411,979 350,158 9,448 21,615 62 0 26,850 0 1 0 881 SERVICES CW369 1,329,707 1,066,483 28,724 70,056 199 3,957 100,752 0 5,689 53,767 882 METERS CW370 6,073,947 3,631,150 96,756 343,782 791 150,127 1,102,588 27 104,195 599,980 883 STREET LIGHTS DA373 227,907 0 0 0 0 480 0 0 6 0 884 INSTALL ON CUST PREMISES CWINSTAL 193,695 137,700 3,715 8,500 24 79 10,559 26,210 32 5,363 885 0 886 CUSTOMER ACCOUNTING 0 887 METER READING CW902 0 0 0 0 0 0 0 0 0 0 888 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 0 0 0 889 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 0 0 0 890 MISC C10 0 0 0 0 0 0 0 0 0 0 891 0 892 CONSUMER INFORMATION 0 893 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 0 0 0 894 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 895 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 896 MISC C10 0 0 0 0 0 0 0 0 0 0 897 0 898 MISCELLANEOUS 0 899 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 900 ENERGY E99U 0 0 0 0 0 0 0 0 0 0 901 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 902 REVENUE R02 0 0 0 0 0 0 0 0 0 0 903 OTHER R01 0 0 0 0 0 0 0 0 0 0 904 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 0 0 0 905 906 TOTALS PAGE 3D 150,952,190 69,023,727 2,106,824 2,171,839 10,768 4,779,265 28,116,787 50,132 15,972,606 22,676,682 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 29 of 48 846 IDAHO POWER COMPANY 847 3CP/12CP CLASS COST OF SERVICE STUDY 848 TWELVE MONTHS ENDING DECEMBER 31, 2023 849 *** TABLE 14 - DEPRECIATION EXPENSE ***ALLOCATION TO CLASSES 850 (K) (L) (M) (N) (O) (P) 851 FUNCTION ALLOCATION TOTALS UNMETERED MUNICIPAL TRAFFIC SC SC SC 852 FACTOR GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 853 (40) (41) (42) 854 DEMAND - BASE-LOAD TOTAL 61,229,781 855 DEMAND - Base-load Summer D10BS 26,311,580 14,208 0 2,840 189,280 181,897 779,723 856 DEMAND - Peak D10P 6,492,310 3,506 0 701 46,704 44,883 192,394 857 DEMAND - Base-load Non-Summer D10BNS 34,918,201 28,025 0 5,797 574,964 296,014 1,327,673 858 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 859 ENERGY - Summer E10S 0 0 0 0 0 0 0 860 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 861 862 TRANSMISSION 0 863 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 864 DEMAND - TRANSMISSION D13 28,824,414 19,477 0 3,977 345,313 222,265 979,501 865 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 866 DEMAND - DIRECT DA3509 1,909 0 0 0 0 0 0 867 868 DISTRIBUTION 869 SUBSTATIONS - GENERAL D20 9,040,007 8,182 16,999 855 0 0 0 870 SUBSTATIONS - DIRECT DA3602 145,538 0 0 0 0 10,960 134,541 871 LINES - PRIMARY DEMAND D20 12,917,578 11,692 24,290 1,222 0 0 0 872 LINES - PRIMARY CUSTOMER C20 6,402,133 17,774 31,850 8,187 0 0 0 873 LINES - SECONDARY DIRECT DA3647 849,132 0 0 0 0 115,366 0 874 LINE TRANS - PRIMARY DEMAND D50 2,620,571 2,372 4,928 248 0 0 0 875 LINE TRANS - PRIMARY CUST C50 1,298,792 3,606 6,461 1,661 0 0 0 876 LINE TRANS - SECOND DIRECT DA368 726,262 0 0 0 0 42,133 0 877 LINE TRANS - SECOND DEMAND D60 7,579,012 8,058 16,741 842 0 0 0 878 LINE TRANS - SECOND CUSTOMER C60 3,756,265 10,435 18,699 4,807 0 0 0 879 LINES - SECONDARY DEMAND D30 831,250 1,288 2,676 135 0 0 0 880 LINES - SECONDARY CUSTOMER C30 411,979 1,182 2,119 545 0 0 0 881 SERVICES CW369 1,329,707 0 0 0 0 80 0 882 METERS CW370 6,073,947 72 12,647 5,871 1,611 3,963 20,389 883 STREET LIGHTS DA373 227,907 0 227,422 0 0 0 0 884 INSTALL ON CUST PREMISES CWINSTAL 193,695 465 833 214 0 0 0 885 886 CUSTOMER ACCOUNTING 887 METER READING CW902 0 0 0 0 0 0 0 888 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 889 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 890 MISC C10 0 0 0 0 0 0 0 891 892 CONSUMER INFORMATION 893 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 894 SALES EXPENSE C10 0 0 0 0 0 0 0 895 ADVERTISING C10 0 0 0 0 0 0 0 896 MISC C10 0 0 0 0 0 0 0 897 898 MISCELLANEOUS 899 DEMAND D99U 0 0 0 0 0 0 0 900 ENERGY E99U 0 0 0 0 0 0 0 901 CUSTOMER C10 0 0 0 0 0 0 0 902 REVENUE R02 0 0 0 0 0 0 0 903 OTHER R01 0 0 0 0 0 0 0 904 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 905 906 TOTALS PAGE 3D 150,952,190 130,341 365,665 37,901 1,157,872 917,560 3,434,221 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 30 of 48 907 IDAHO POWER COMPANY PAGE 3E 908 3CP/12CP CLASS COST OF SERVICE STUDY 909 TWELVE MONTHS ENDING DECEMBER 31, 2023 910 *** TABLE 15 - AMORTIZATION OF LIMITED TERM PLANT ***ALLOCATION TO C TION TO CLASSES 911 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 912 FUNCTION ALLOCATION TOTALS RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 913 FACTOR RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING EC/PRIM/TRA SECONDARY 914 (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 915 DEMAND - BASE-LOAD TOTAL 4,744,176 916 DEMAND - Base-load Summer D10BS 2,038,661 841,510 20,600 15,542 54 59,965 354,364 0 205,039 451,093 917 DEMAND - Peak D10P 48,412 19,984 489 369 1 1,424 8,415 0 4,869 10,712 918 DEMAND - Base-load Non-Summer D10BNS 2,705,515 1,187,531 33,016 27,221 138 108,448 649,338 0 398,092 128,755 919 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 0 0 0 920 ENERGY - Summer E10S 0 0 0 0 0 0 0 0 0 0 921 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 0 0 0 922 0 923 TRANSMISSION 0 924 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 925 DEMAND - TRANSMISSION D13 348,044 148,288 3,890 3,101 14 12,158 72,491 0 43,429 45,708 926 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 927 DEMAND - DIRECT DA3509 20 0 0 0 0 20 0 0 0 0 928 0 929 DISTRIBUTION 0 930 SUBSTATIONS - GENERAL D20 112,576 42,794 2,045 929 14 3,359 19,569 43 13,422 30,076 931 SUBSTATIONS - DIRECT DA3602 5,250 0 0 0 0 0 0 0 1 0 932 LINES - PRIMARY DEMAND D20 137,497 52,267 2,498 1,135 17 4,102 23,901 53 16,394 36,734 933 LINES - PRIMARY CUSTOMER C20 68,145 56,027 1,512 3,459 10 32 4,296 0 13 2,182 934 LINES - SECONDARY DIRECT DA3647 8,592 0 0 0 0 2,296 0 106 5,022 0 935 LINE TRANS - PRIMARY DEMAND D50 30,929 11,757 562 255 4 923 5,376 12 3,688 8,263 936 LINE TRANS - PRIMARY CUST C50 15,329 12,603 340 778 2 7 966 0 3 491 937 LINE TRANS - SECOND DIRECT DA368 8,572 0 0 0 0 3,392 0 0 4,682 0 938 LINE TRANS - SECOND DEMAND D60 89,450 39,942 1,909 867 13 0 18,265 40 39 28,072 939 LINE TRANS - SECOND CUSTOMER C60 44,333 36,473 984 2,251 6 0 2,797 0 0 1,420 940 LINES - SECONDARY DEMAND D30 8,812 5,734 274 124 2 0 2,622 6 6 0 941 LINES - SECONDARY CUSTOMER C30 4,367 3,712 100 229 1 0 285 0 0 0 942 SERVICES CW369 17,932 14,382 387 945 3 53 1,359 0 77 725 943 METERS CW370 30,183 18,044 481 1,708 4 746 5,479 0 518 2,981 944 STREET LIGHTS DA373 1,623 0 0 0 0 3 0 0 0 0 945 INSTALL ON CUST PREMISES CWINSTAL 1,158 823 22 51 0 0 63 157 0 32 946 0 947 CUSTOMER ACCOUNTING 0 948 METER READING CW902 0 0 0 0 0 0 0 0 0 0 949 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 0 0 0 950 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 0 0 0 951 MISC C10 0 0 0 0 0 0 0 0 0 0 952 0 953 CONSUMER INFORMATION 0 954 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 0 0 0 955 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 956 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 957 MISC C10 0 0 0 0 0 0 0 0 0 0 958 0 959 MISCELLANEOUS 0 960 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 961 ENERGY E99U 0 0 0 0 0 0 0 0 0 0 962 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 963 REVENUE R02 0 0 0 0 0 0 0 0 0 0 964 OTHER R01 0 0 0 0 0 0 0 0 0 0 965 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 0 0 0 966 967 TOTALS PAGE 3E 5,725,400 2,491,872 69,110 58,965 282 196,930 1,169,587 417 695,293 747,246 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 31 of 48 907 IDAHO POWER COMPANY 908 3CP/12CP CLASS COST OF SERVICE STUDY 909 TWELVE MONTHS ENDING DECEMBER 31, 2023 910 *** TABLE 15 - AMORTIZATION OF LIMITED TERM PLANT ***ALLOCATION TO CLASSES 911 (K) (L) (M) (N) (O) (P) 912 FUNCTION ALLOCATION TOTALS UNMETERED MUNICIPAL TRAFFIC SC SC SC 913 FACTOR GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 914 (40) (41) (42) 915 DEMAND - BASE-LOAD TOTAL 4,744,176 916 DEMAND - Base-load Summer D10BS 2,038,661 1,101 0 220 14,666 14,094 60,414 917 DEMAND - Peak D10P 48,412 26 0 5 348 335 1,435 918 DEMAND - Base-load Non-Summer D10BNS 2,705,515 2,171 0 449 44,549 22,936 102,870 919 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 920 ENERGY - Summer E10S 0 0 0 0 0 0 0 921 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 922 923 TRANSMISSION 0 924 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 925 DEMAND - TRANSMISSION D13 348,044 235 0 48 4,170 2,684 11,827 926 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 927 DEMAND - DIRECT DA3509 20 0 0 0 0 0 0 928 929 DISTRIBUTION 930 SUBSTATIONS - GENERAL D20 112,576 102 212 11 0 0 0 931 SUBSTATIONS - DIRECT DA3602 5,250 0 0 0 0 395 4,853 932 LINES - PRIMARY DEMAND D20 137,497 124 259 13 0 0 0 933 LINES - PRIMARY CUSTOMER C20 68,145 189 339 87 0 0 0 934 LINES - SECONDARY DIRECT DA3647 8,592 0 0 0 0 1,167 0 935 LINE TRANS - PRIMARY DEMAND D50 30,929 28 58 3 0 0 0 936 LINE TRANS - PRIMARY CUST C50 15,329 43 76 20 0 0 0 937 LINE TRANS - SECOND DIRECT DA368 8,572 0 0 0 0 497 0 938 LINE TRANS - SECOND DEMAND D60 89,450 95 198 10 0 0 0 939 LINE TRANS - SECOND CUSTOMER C60 44,333 123 221 57 0 0 0 940 LINES - SECONDARY DEMAND D30 8,812 14 28 1 0 0 0 941 LINES - SECONDARY CUSTOMER C30 4,367 13 22 6 0 0 0 942 SERVICES CW369 17,932 0 0 0 0 1 0 943 METERS CW370 30,183 0 63 29 8 20 101 944 STREET LIGHTS DA373 1,623 0 1,619 0 0 0 0 945 INSTALL ON CUST PREMISES CWINSTAL 1,158 3 5 1 0 0 0 946 947 CUSTOMER ACCOUNTING 948 METER READING CW902 0 0 0 0 0 0 0 949 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 950 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 951 MISC C10 0 0 0 0 0 0 0 952 953 CONSUMER INFORMATION 954 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 955 SALES EXPENSE C10 0 0 0 0 0 0 0 956 ADVERTISING C10 0 0 0 0 0 0 0 957 MISC C10 0 0 0 0 0 0 0 958 959 MISCELLANEOUS 960 DEMAND D99U 0 0 0 0 0 0 0 961 ENERGY E99U 0 0 0 0 0 0 0 962 CUSTOMER C10 0 0 0 0 0 0 0 963 REVENUE R02 0 0 0 0 0 0 0 964 OTHER R01 0 0 0 0 0 0 0 965 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 966 967 TOTALS PAGE 3E 5,725,400 4,267 3,100 960 63,741 42,128 181,501 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 32 of 48 968 IDAHO POWER COMPANY PAGE 3F 969 3CP/12CP CLASS COST OF SERVICE STUDY 970 TWELVE MONTHS ENDING DECEMBER 31, 2023 971 *** TABLE 16 - TAXES OTHER THAN INCOME ***ALLOCATION TO C TION TO CLASSES 972 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 973 FUNCTION ALLOCATION TOTALS RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 974 FACTOR RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING EC/PRIM/TRA SECONDARY 975 (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 976 DEMAND - BASE-LOAD TOTAL 8,477,654 977 DEMAND - Base-load Summer D10BS 3,643,006 1,503,745 36,811 27,772 97 107,155 633,234 0 366,396 806,086 978 DEMAND - Peak D10P 991,152 409,124 10,015 7,556 26 29,154 172,284 0 99,685 219,312 979 DEMAND - Base-load Non-Summer D10BNS 4,834,648 2,122,071 58,998 48,643 247 193,792 1,160,342 0 711,374 230,080 980 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 0 0 0 981 ENERGY - Summer E10S 0 0 0 0 0 0 0 0 0 0 982 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 0 0 0 983 0 984 TRANSMISSION 0 985 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 986 DEMAND - TRANSMISSION D13 7,560,424 3,221,214 84,511 67,357 298 264,106 1,574,705 0 943,389 992,904 987 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 988 DEMAND - DIRECT DA3509 444 0 0 0 0 444 0 0 0 0 989 0 990 DISTRIBUTION 0 991 SUBSTATIONS - GENERAL D20 1,875,874 713,083 34,084 15,482 227 55,965 326,084 719 223,660 501,167 992 SUBSTATIONS - DIRECT DA3602 31,792 0 0 0 0 0 0 0 8 0 993 LINES - PRIMARY DEMAND D20 2,516,018 956,424 45,715 20,766 304 75,064 437,360 964 299,984 672,191 994 LINES - PRIMARY CUSTOMER C20 1,246,974 1,025,223 27,662 63,287 182 583 78,614 0 237 39,926 995 LINES - SECONDARY DIRECT DA3647 157,228 0 0 0 0 42,019 0 1,947 91,899 0 996 LINE TRANS - PRIMARY DEMAND D50 565,960 215,141 10,283 4,671 68 16,885 98,381 217 67,479 151,205 997 LINE TRANS - PRIMARY CUST C50 280,498 230,617 6,222 14,236 41 131 17,684 0 53 8,981 998 LINE TRANS - SECOND DIRECT DA368 156,850 0 0 0 0 62,077 0 0 85,673 0 999 LINE TRANS - SECOND DEMAND D60 1,636,826 730,889 34,935 15,869 233 0 334,226 737 719 513,681 1000 LINE TRANS - SECOND CUSTOMER C60 811,234 667,409 18,007 41,199 119 0 51,177 0 1 25,991 1001 LINES - SECONDARY DEMAND D30 161,241 104,928 5,015 2,278 33 0 47,982 106 103 0 1002 LINES - SECONDARY CUSTOMER C30 79,913 67,922 1,833 4,193 12 0 5,208 0 0 0 1003 SERVICES CW369 328,134 263,178 7,088 17,288 49 977 24,863 0 1,404 13,268 1004 METERS CW370 552,314 330,186 8,798 31,261 72 13,651 100,260 2 9,475 54,557 1005 STREET LIGHTS DA373 29,696 0 0 0 0 62 0 0 1 0 1006 INSTALL ON CUST PREMISES CWINSTAL 21,194 15,067 407 930 3 9 1,155 2,868 4 587 1007 0 1008 CUSTOMER ACCOUNTING 0 1009 METER READING CW902 0 0 0 0 0 0 0 0 0 0 1010 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 0 0 0 1011 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 0 0 0 1012 MISC C10 0 0 0 0 0 0 0 0 0 0 1013 0 1014 CONSUMER INFORMATION 0 1015 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 0 0 0 1016 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 1017 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 1018 MISC C10 0 0 0 0 0 0 0 0 0 0 1019 0 1020 MISCELLANEOUS 0 1021 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 1022 ENERGY E99U 2,119,909 771,520 17,478 19,664 53 85,562 472,327 749 339,390 265,137 1023 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 1024 REVENUE R02 0 0 0 0 0 0 0 0 0 0 1025 OTHER R01 0 0 0 0 0 0 0 0 0 0 1026 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 0 0 0 1027 1028 TOTALS PAGE 3F 29,601,331 13,347,740 407,862 402,452 2,065 947,637 5,535,886 8,310 3,240,936 4,495,074 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 33 of 48 968 IDAHO POWER COMPANY 969 3CP/12CP CLASS COST OF SERVICE STUDY 970 TWELVE MONTHS ENDING DECEMBER 31, 2023 971 *** TABLE 16 - TAXES OTHER THAN INCOME ***ALLOCATION TO CLASSES 972 (K) (L) (M) (N) (O) (P) 973 FUNCTION ALLOCATION TOTALS UNMETERED MUNICIPAL TRAFFIC SC SC SC 974 FACTOR GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 975 (40) (41) (42) 976 DEMAND - BASE-LOAD TOTAL 8,477,654 977 DEMAND - Base-load Summer D10BS 3,643,006 1,967 0 393 26,207 25,185 107,958 978 DEMAND - Peak D10P 991,152 535 0 107 7,130 6,852 29,372 979 DEMAND - Base-load Non-Summer D10BNS 4,834,648 3,880 0 803 79,607 40,985 183,825 980 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 981 ENERGY - Summer E10S 0 0 0 0 0 0 0 982 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 983 984 TRANSMISSION 0 985 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 986 DEMAND - TRANSMISSION D13 7,560,424 5,109 0 1,043 90,573 58,298 256,916 987 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 988 DEMAND - DIRECT DA3509 444 0 0 0 0 0 0 989 990 DISTRIBUTION 991 SUBSTATIONS - GENERAL D20 1,875,874 1,698 3,527 177 0 0 0 992 SUBSTATIONS - DIRECT DA3602 31,792 0 0 0 0 2,394 29,390 993 LINES - PRIMARY DEMAND D20 2,516,018 2,277 4,731 238 0 0 0 994 LINES - PRIMARY CUSTOMER C20 1,246,974 3,462 6,204 1,595 0 0 0 995 LINES - SECONDARY DIRECT DA3647 157,228 0 0 0 0 21,361 0 996 LINE TRANS - PRIMARY DEMAND D50 565,960 512 1,064 54 0 0 0 997 LINE TRANS - PRIMARY CUST C50 280,498 779 1,395 359 0 0 0 998 LINE TRANS - SECOND DIRECT DA368 156,850 0 0 0 0 9,099 0 999 LINE TRANS - SECOND DEMAND D60 1,636,826 1,740 3,615 182 0 0 0 1000 LINE TRANS - SECOND CUSTOMER C60 811,234 2,254 4,038 1,038 0 0 0 1001 LINES - SECONDARY DEMAND D30 161,241 250 519 26 0 0 0 1002 LINES - SECONDARY CUSTOMER C30 79,913 229 411 106 0 0 0 1003 SERVICES CW369 328,134 0 0 0 0 20 0 1004 METERS CW370 552,314 7 1,150 534 146 360 1,854 1005 STREET LIGHTS DA373 29,696 0 29,633 0 0 0 0 1006 INSTALL ON CUST PREMISES CWINSTAL 21,194 51 91 23 0 0 0 1007 1008 CUSTOMER ACCOUNTING 1009 METER READING CW902 0 0 0 0 0 0 0 1010 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 1011 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 1012 MISC C10 0 0 0 0 0 0 0 1013 1014 CONSUMER INFORMATION 1015 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 1016 SALES EXPENSE C10 0 0 0 0 0 0 0 1017 ADVERTISING C10 0 0 0 0 0 0 0 1018 MISC C10 0 0 0 0 0 0 0 1019 1020 MISCELLANEOUS 1021 DEMAND D99U 0 0 0 0 0 0 0 1022 ENERGY E99U 2,119,909 1,980 3,379 405 33,289 24,885 84,090 1023 CUSTOMER C10 0 0 0 0 0 0 0 1024 REVENUE R02 0 0 0 0 0 0 0 1025 OTHER R01 0 0 0 0 0 0 0 1026 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 1027 1028 TOTALS PAGE 3F 29,601,331 26,730 59,758 7,082 236,953 189,440 693,404 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 34 of 48 1029 IDAHO POWER COMPANY PAGE 3G 1030 3CP/12CP CLASS COST OF SERVICE STUDY 1031 TWELVE MONTHS ENDING DECEMBER 31, 2023 1032 *** TABLE 17 - REGULATORY DEBITS/CREDITS ***ALLOCATION TO C TION TO CLASSES 1033 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 1034 FUNCTION ALLOCATION TOTALS RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 1035 FACTOR RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING EC/PRIM/TRA SECONDARY 1036 (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 1037 DEMAND - BASE-LOAD TOTAL 0 1038 DEMAND - Base-load Summer D10BS 1,464,604 259,788 6,360 4,798 17 18,512 109,398 0 63,299 139,260 1039 DEMAND - Peak D10P 387,790 160,070 3,918 2,956 10 11,406 67,406 0 39,002 85,806 1040 DEMAND - Base-load Non-Summer D10BNS 0 366,610 10,192 8,404 43 33,480 200,461 0 122,897 39,749 1041 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 0 0 0 1042 ENERGY - Summer E10S 0 0 0 0 0 0 0 0 0 0 1043 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 0 0 0 1044 0 1045 TRANSMISSION 0 1046 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 1047 DEMAND - TRANSMISSION D13 481,088 204,974 5,378 4,286 19 16,806 100,202 0 60,030 63,181 1048 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 1049 DEMAND - DIRECT DA3509 28 0 0 0 0 28 0 0 0 0 1050 0 1051 DISTRIBUTION 0 1052 SUBSTATIONS - GENERAL D20 155,610 59,153 2,827 1,284 19 4,643 27,050 60 18,553 41,573 1053 SUBSTATIONS - DIRECT DA3602 7,257 0 0 0 0 0 0 0 2 0 1054 LINES - PRIMARY DEMAND D20 190,057 72,247 3,453 1,569 23 5,670 33,038 73 22,660 50,776 1055 LINES - PRIMARY CUSTOMER C20 94,195 77,444 2,090 4,781 14 44 5,938 0 18 3,016 1056 LINES - SECONDARY DIRECT DA3647 11,877 0 0 0 0 3,174 0 147 6,942 0 1057 LINE TRANS - PRIMARY DEMAND D50 42,752 16,251 777 353 5 1,275 7,432 16 5,097 11,422 1058 LINE TRANS - PRIMARY CUST C50 21,188 17,420 470 1,075 3 10 1,336 0 4 678 1059 LINE TRANS - SECOND DIRECT DA368 11,848 0 0 0 0 4,689 0 0 6,472 0 1060 LINE TRANS - SECOND DEMAND D60 123,644 55,210 2,639 1,199 18 0 25,247 56 54 38,803 1061 LINE TRANS - SECOND CUSTOMER C60 61,280 50,415 1,360 3,112 9 0 3,866 0 0 1,963 1062 LINES - SECONDARY DEMAND D30 12,180 7,926 379 172 3 0 3,625 8 8 0 1063 LINES - SECONDARY CUSTOMER C30 6,037 5,131 138 317 1 0 393 0 0 0 1064 SERVICES CW369 24,787 19,880 535 1,306 4 74 1,878 0 106 1,002 1065 METERS CW370 41,721 24,942 665 2,361 5 1,031 7,574 0 716 4,121 1066 STREET LIGHTS DA373 2,243 0 0 0 0 5 0 0 0 0 1067 INSTALL ON CUST PREMISES CWINSTAL 1,601 1,138 31 70 0 1 87 217 0 44 1068 0 1069 CUSTOMER ACCOUNTING 0 1070 METER READING CW902 0 0 0 0 0 0 0 0 0 0 1071 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 0 0 0 1072 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 0 0 0 1073 MISC C10 0 0 0 0 0 0 0 0 0 0 1074 0 1075 CONSUMER INFORMATION 0 1076 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 0 0 0 1077 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 1078 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 1079 MISC C10 0 0 0 0 0 0 0 0 0 0 1080 0 1081 MISCELLANEOUS 0 1082 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 1083 ENERGY E99U 0 0 0 0 0 0 0 0 0 0 1084 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 1085 REVENUE R02 0 0 0 0 0 0 0 0 0 0 1086 OTHER R01 0 0 0 0 0 0 0 0 0 0 1087 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 0 0 0 1088 1089 TOTALS PAGE 3G 3,141,786 1,398,600 41,212 38,043 192 100,848 594,931 576 345,861 481,396 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 35 of 48 1029 IDAHO POWER COMPANY 1030 3CP/12CP CLASS COST OF SERVICE STUDY 1031 TWELVE MONTHS ENDING DECEMBER 31, 2023 1032 *** TABLE 17 - REGULATORY DEBITS/CREDITS ***ALLOCATION TO CLASSES 1033 (K) (L) (M) (N) (O) (P) 1034 FUNCTION ALLOCATION TOTALS UNMETERED MUNICIPAL TRAFFIC SC SC SC 1035 FACTOR GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 1036 (40) (41) (42) 1037 DEMAND - BASE-LOAD TOTAL 0 1038 DEMAND - Base-load Summer D10BS 1,464,604 340 0 68 4,528 4,351 18,651 1039 DEMAND - Peak D10P 387,790 209 0 42 2,790 2,681 11,492 1040 DEMAND - Base-load Non-Summer D10BNS 0 670 0 139 13,753 7,081 31,758 1041 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 1042 ENERGY - Summer E10S 0 0 0 0 0 0 0 1043 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 1044 1045 TRANSMISSION 0 1046 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 1047 DEMAND - TRANSMISSION D13 481,088 325 0 66 5,763 3,710 16,348 1048 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 1049 DEMAND - DIRECT DA3509 28 0 0 0 0 0 0 1050 1051 DISTRIBUTION 1052 SUBSTATIONS - GENERAL D20 155,610 141 293 15 0 0 0 1053 SUBSTATIONS - DIRECT DA3602 7,257 0 0 0 0 547 6,709 1054 LINES - PRIMARY DEMAND D20 190,057 172 357 18 0 0 0 1055 LINES - PRIMARY CUSTOMER C20 94,195 262 469 120 0 0 0 1056 LINES - SECONDARY DIRECT DA3647 11,877 0 0 0 0 1,614 0 1057 LINE TRANS - PRIMARY DEMAND D50 42,752 39 80 4 0 0 0 1058 LINE TRANS - PRIMARY CUST C50 21,188 59 105 27 0 0 0 1059 LINE TRANS - SECOND DIRECT DA368 11,848 0 0 0 0 687 0 1060 LINE TRANS - SECOND DEMAND D60 123,644 131 273 14 0 0 0 1061 LINE TRANS - SECOND CUSTOMER C60 61,280 170 305 78 0 0 0 1062 LINES - SECONDARY DEMAND D30 12,180 19 39 2 0 0 0 1063 LINES - SECONDARY CUSTOMER C30 6,037 17 31 8 0 0 0 1064 SERVICES CW369 24,787 0 0 0 0 1 0 1065 METERS CW370 41,721 0 87 40 11 27 140 1066 STREET LIGHTS DA373 2,243 0 2,238 0 0 0 0 1067 INSTALL ON CUST PREMISES CWINSTAL 1,601 4 7 2 0 0 0 1068 1069 CUSTOMER ACCOUNTING 1070 METER READING CW902 0 0 0 0 0 0 0 1071 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 1072 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 1073 MISC C10 0 0 0 0 0 0 0 1074 1075 CONSUMER INFORMATION 1076 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 1077 SALES EXPENSE C10 0 0 0 0 0 0 0 1078 ADVERTISING C10 0 0 0 0 0 0 0 1079 MISC C10 0 0 0 0 0 0 0 1080 1081 MISCELLANEOUS 1082 DEMAND D99U 0 0 0 0 0 0 0 1083 ENERGY E99U 0 0 0 0 0 0 0 1084 CUSTOMER C10 0 0 0 0 0 0 0 1085 REVENUE R02 0 0 0 0 0 0 0 1086 OTHER R01 0 0 0 0 0 0 0 1087 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 1088 1089 TOTALS PAGE 3G 3,141,786 2,559 4,285 643 26,845 20,698 85,097 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 36 of 48 1090 IDAHO POWER COMPANY PAGE 3H 1091 3CP/12CP CLASS COST OF SERVICE STUDY 1092 TWELVE MONTHS ENDING DECEMBER 31, 2023 1093 *** TABLE 18 - PROVISIONS FOR DEFERRED INCOME TAXES ***ALLOCATION TO C TION TO CLASSES 1094 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 1095 FUNCTION ALLOCATION TOTALS RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 1096 FACTOR RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING EC/PRIM/TRA SECONDARY 1097 (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 1098 DEMAND - BASE-LOAD TOTAL (5,884,910) 1099 DEMAND - Base-load Summer D10BS (2,528,856) (1,043,851) (25,553) (19,279) (68) (74,384) (439,570) 0 (254,340) (559,558) 1100 DEMAND - Peak D10P (554,569) (228,913)(5,604) (4,228) (15) (16,312) (96,396) 0 (55,776) (122,709) 1101 DEMAND - Base-load Non-Summer D10BNS (3,356,054) (1,473,072) (40,954) (33,766) (171) (134,524) (805,471) 0 (493,813) (159,714) 1102 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 0 0 0 1103 ENERGY - Summer E10S 0 0 0 0 0 0 0 0 0 0 1104 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 0 0 0 1105 0 1106 TRANSMISSION 0 1107 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 1108 DEMAND - TRANSMISSION D13 (3,986,872) (1,698,657) (44,566) (35,520) (157) (139,272) (830,396) 0 (497,481) (523,592) 1109 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 1110 DEMAND - DIRECT DA3509 (234) 0 0 0 0 (234) 0 0 0 0 1111 0 1112 DISTRIBUTION 0 1113 SUBSTATIONS - GENERAL D20 (1,163,654) (442,344)(21,143) (9,604) (141) (34,717) (202,278) (446) (138,742) (310,887) 1114 SUBSTATIONS - DIRECT DA3602 (16,185) 0 0 0 0 0 0 0 (4) 0 1115 LINES - PRIMARY DEMAND D20 (1,648,196) (626,535)(29,947) (13,603) (199) (49,173) (286,506) (632) (196,514) (440,340) 1116 LINES - PRIMARY CUSTOMER C20 (816,869) (671,604) (18,121) (41,458) (119) (382) (51,499) 0 (155) (26,155) 1117 LINES - SECONDARY DIRECT DA3647 (98,425) 0 0 0 0 (26,304) 0 (1,219) (57,529) 0 1118 LINE TRANS - PRIMARY DEMAND D50 (357,246) (135,801) (6,491) (2,948) (43) (10,658) (62,100) (137) (42,594) (95,444) 1119 LINE TRANS - PRIMARY CUST C50 (177,056) (145,570) (3,928) (8,986) (26) (83) (11,162) 0 (34) (5,669) 1120 LINE TRANS - SECOND DIRECT DA368 (98,188) 0 0 0 0 (38,860) 0 0 (53,632) 0 1121 LINE TRANS - SECOND DEMAND D60 (1,033,747) (461,597) (22,063) (10,022) (147) 0 (211,082) (465) (454) (324,419) 1122 LINE TRANS - SECOND CUSTOMER C60 (512,340) (421,506) (11,373) (26,020) (75) 0 (32,321) 0 (1) (16,415) 1123 LINES - SECONDARY DEMAND D30 (113,272) (73,712) (3,523) (1,600) (23) 0 (33,707) (74) (73) 0 1124 LINES - SECONDARY CUSTOMER C30 (56,139) (47,715) (1,287) (2,945) (8) 0 (3,659) 0 (0) 0 1125 SERVICES CW369 (229,154) (183,791) (4,950) (12,073) (34) (682) (17,363) 0 (980) (9,266) 1126 METERS CW370 (345,766) (206,707) (5,508) (19,570) (45) (8,546) (62,766) (2) (5,931) (34,155) 1127 STREET LIGHTS DA373 (18,824) 0 0 0 0 (40) 0 0 (0) 0 1128 INSTALL ON CUST PREMISES CWINSTAL (13,292) (9,449) (255) (583) (2) (5) (725) (1,799) (2) (368) 1129 0 1130 CUSTOMER ACCOUNTING 0 1131 METER READING CW902 0 0 0 0 0 0 0 0 0 0 1132 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 0 0 0 1133 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 0 0 0 1134 MISC C10 0 0 0 0 0 0 0 0 0 0 1135 0 1136 CONSUMER INFORMATION 0 1137 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 0 0 0 1138 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 1139 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 1140 MISC C10 0 0 0 0 0 0 0 0 0 0 1141 0 1142 MISCELLANEOUS 0 1143 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 1144 ENERGY E99U 0 0 0 0 0 0 0 0 0 0 1145 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 1146 REVENUE R02 0 0 0 0 0 0 0 0 0 0 1147 OTHER R01 0 0 0 0 0 0 0 0 0 0 1148 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 0 0 0 1149 1150 TOTALS PAGE 3H (17,124,938) (7,870,826) (245,266) (242,206) (1,274) (534,177) (3,147,003)(4,774) (1,798,057) (2,628,690) Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 37 of 48 1090 IDAHO POWER COMPANY 1091 3CP/12CP CLASS COST OF SERVICE STUDY 1092 TWELVE MONTHS ENDING DECEMBER 31, 2023 1093 *** TABLE 18 - PROVISIONS FOR DEFERRED INCOME TAXES ***ALLOCATION TO CLASSES 1094 (K) (L) (M) (N) (O) (P) 1095 FUNCTION ALLOCATION TOTALS UNMETERED MUNICIPAL TRAFFIC SC SC SC 1096 FACTOR GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 1097 (40) (41) (42) 1098 DEMAND - BASE-LOAD TOTAL (5,884,910) 1099 DEMAND - Base-load Summer D10BS (2,528,856) (1,366) 0 (273) (18,192) (17,482) (74,941) 1100 DEMAND - Peak D10P (554,569) (299) 0 (60) (3,989) (3,834) (16,434) 1101 DEMAND - Base-load Non-Summer D10BNS (3,356,054) (2,694) 0 (557) (55,261) (28,450) (127,605) 1102 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 1103 ENERGY - Summer E10S 0 0 0 0 0 0 0 1104 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 1105 1106 TRANSMISSION 0 1107 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 1108 DEMAND - TRANSMISSION D13 (3,986,872) (2,694) 0 (550) (47,762) (30,743) (135,481) 1109 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 1110 DEMAND - DIRECT DA3509 (234) 0 0 0 0 0 0 1111 1112 DISTRIBUTION 1113 SUBSTATIONS - GENERAL D20 (1,163,654) (1,053) (2,188) (110) 0 0 0 1114 SUBSTATIONS - DIRECT DA3602 (16,185) 0 0 0 0 (1,219) (14,962) 1115 LINES - PRIMARY DEMAND D20 (1,648,196) (1,492) (3,099) (156) 0 0 0 1116 LINES - PRIMARY CUSTOMER C20 (816,869) (2,268) (4,064) (1,045) 0 0 0 1117 LINES - SECONDARY DIRECT DA3647 (98,425) 0 0 0 0 (13,372) 0 1118 LINE TRANS - PRIMARY DEMAND D50 (357,246) (323) (672) (34) 0 0 0 1119 LINE TRANS - PRIMARY CUST C50 (177,056) (492) (881) (226) 0 0 0 1120 LINE TRANS - SECOND DIRECT DA368 (98,188) 0 0 0 0 (5,696) 0 1121 LINE TRANS - SECOND DEMAND D60 (1,033,747) (1,099) (2,283) (115) 0 0 0 1122 LINE TRANS - SECOND CUSTOMER C60 (512,340) (1,423) (2,551) (656) 0 0 0 1123 LINES - SECONDARY DEMAND D30 (113,272) (176) (365) (18) 0 0 0 1124 LINES - SECONDARY CUSTOMER C30 (56,139) (161) (289) (74) 0 0 0 1125 SERVICES CW369 (229,154) 0 0 0 0 (14) 0 1126 METERS CW370 (345,766) (4) (720) (334) (92) (226) (1,161) 1127 STREET LIGHTS DA373 (18,824) 0 (18,784) 0 0 0 0 1128 INSTALL ON CUST PREMISES CWINSTAL (13,292) (32) (57) (15) 0 0 0 1129 1130 CUSTOMER ACCOUNTING 1131 METER READING CW902 0 0 0 0 0 0 0 1132 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 1133 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 1134 MISC C10 0 0 0 0 0 0 0 1135 1136 CONSUMER INFORMATION 1137 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 1138 SALES EXPENSE C10 0 0 0 0 0 0 0 1139 ADVERTISING C10 0 0 0 0 0 0 0 1140 MISC C10 0 0 0 0 0 0 0 1141 1142 MISCELLANEOUS 1143 DEMAND D99U 0 0 0 0 0 0 0 1144 ENERGY E99U 0 0 0 0 0 0 0 1145 CUSTOMER C10 0 0 0 0 0 0 0 1146 REVENUE R02 0 0 0 0 0 0 0 1147 OTHER R01 0 0 0 0 0 0 0 1148 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 1149 1150 TOTALS PAGE 3H (17,124,938) (15,575) (35,952) (4,223) (125,296) (101,036) (370,583) Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 38 of 48 1151 IDAHO POWER COMPANY PAGE 3I 1152 3CP/12CP CLASS COST OF SERVICE STUDY 1153 TWELVE MONTHS ENDING DECEMBER 31, 2023 1154 *** TABLE 19 - INVESTMENT TAX CREDIT ADJUSTMENT ***ALLOCATION TO C TION TO CLASSES 1155 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 1156 FUNCTION ALLOCATION TOTALS RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 1157 FACTOR RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING EC/PRIM/TRA SECONDARY 1158 (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 1159 DEMAND - BASE-LOAD TOTAL 8,304,618 1160 DEMAND - Base-load Summer D10BS 3,568,649 1,473,052 36,060 27,206 95 104,968 620,309 0 358,917 789,633 1161 DEMAND - Peak D10P 782,592 323,035 7,908 5,966 21 23,019 136,032 0 78,709 173,164 1162 DEMAND - Base-load Non-Summer D10BNS 4,735,968 2,078,758 57,793 47,650 242 189,837 1,136,658 0 696,855 225,384 1163 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 0 0 0 1164 ENERGY - Summer E10S 0 0 0 0 0 0 0 0 0 0 1165 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 0 0 0 1166 0 1167 TRANSMISSION 0 1168 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 1169 DEMAND - TRANSMISSION D13 5,626,160 2,397,097 62,890 50,125 222 196,537 1,171,832 0 702,032 738,879 1170 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 1171 DEMAND - DIRECT DA3509 330 0 0 0 0 330 0 0 0 0 1172 0 1173 DISTRIBUTION 0 1174 SUBSTATIONS - GENERAL D20 1,642,116 624,224 29,836 13,553 199 48,991 285,450 629 195,789 438,715 1175 SUBSTATIONS - DIRECT DA3602 22,840 0 0 0 0 0 0 0 6 0 1176 LINES - PRIMARY DEMAND D20 2,222,644 844,902 40,384 18,344 269 66,311 386,363 852 265,005 593,812 1177 LINES - PRIMARY CUSTOMER C20 1,101,574 905,679 24,436 55,908 161 515 69,448 0 210 35,270 1178 LINES - SECONDARY DIRECT DA3647 138,894 0 0 0 0 37,120 0 1,720 81,184 0 1179 LINE TRANS - PRIMARY DEMAND D50 499,968 190,055 9,084 4,126 60 14,916 86,910 192 59,611 133,574 1180 LINE TRANS - PRIMARY CUST C50 247,791 203,726 5,497 12,576 36 116 15,622 0 47 7,934 1181 LINE TRANS - SECOND DIRECT DA368 138,561 0 0 0 0 54,839 0 0 75,684 0 1182 LINE TRANS - SECOND DEMAND D60 1,445,968 645,665 30,861 14,019 206 0 295,255 651 635 453,785 1183 LINE TRANS - SECOND CUSTOMER C60 716,642 589,587 15,908 36,395 105 0 45,210 0 1 22,961 1184 LINES - SECONDARY DEMAND D30 142,440 92,693 4,431 2,013 30 0 42,387 93 91 0 1185 LINES - SECONDARY CUSTOMER C30 70,595 60,002 1,619 3,704 11 0 4,601 0 0 0 1186 SERVICES CW369 289,873 232,491 6,262 15,272 43 863 21,964 0 1,240 11,721 1187 METERS CW370 487,913 291,686 7,772 27,616 64 12,060 88,570 2 8,370 48,196 1188 STREET LIGHTS DA373 26,233 0 0 0 0 55 0 0 1 0 1189 INSTALL ON CUST PREMISES CWINSTAL 18,723 13,310 359 822 2 8 1,021 2,534 3 518 1190 0 1191 CUSTOMER ACCOUNTING 0 1192 METER READING CW902 0 0 0 0 0 0 0 0 0 0 1193 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 0 0 0 1194 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 0 0 0 1195 MISC C10 0 0 0 0 0 0 0 0 0 0 1196 0 1197 CONSUMER INFORMATION 0 1198 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 0 0 0 1199 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 1200 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 1201 MISC C10 0 0 0 0 0 0 0 0 0 0 1202 0 1203 MISCELLANEOUS 0 1204 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 1205 ENERGY E99U 0 0 0 0 0 0 0 0 0 0 1206 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 1207 REVENUE R02 0 0 0 0 0 0 0 0 0 0 1208 OTHER R01 0 0 0 0 0 0 0 0 0 0 1209 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 0 0 0 1210 1211 TOTALS PAGE 3I 23,926,476 10,965,963 341,101 335,293 1,765 750,485 4,407,628 6,673 2,524,389 3,673,546 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 39 of 48 1151 IDAHO POWER COMPANY 1152 3CP/12CP CLASS COST OF SERVICE STUDY 1153 TWELVE MONTHS ENDING DECEMBER 31, 2023 1154 *** TABLE 19 - INVESTMENT TAX CREDIT ADJUSTMENT ***ALLOCATION TO CLASSES 1155 (K) (L) (M) (N) (O) (P) 1156 FUNCTION ALLOCATION TOTALS UNMETERED MUNICIPAL TRAFFIC SC SC SC 1157 FACTOR GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 1158 (40) (41) (42) 1159 DEMAND - BASE-LOAD TOTAL 8,304,618 1160 DEMAND - Base-load Summer D10BS 3,568,649 1,927 0 385 25,672 24,671 105,754 1161 DEMAND - Peak D10P 782,592 423 0 84 5,630 5,410 23,191 1162 DEMAND - Base-load Non-Summer D10BNS 4,735,968 3,801 0 786 77,983 40,148 180,073 1163 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 1164 ENERGY - Summer E10S 0 0 0 0 0 0 0 1165 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 1166 1167 TRANSMISSION 0 1168 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 1169 DEMAND - TRANSMISSION D13 5,626,160 3,802 0 776 67,401 43,383 191,186 1170 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 1171 DEMAND - DIRECT DA3509 330 0 0 0 0 0 0 1172 1173 DISTRIBUTION 1174 SUBSTATIONS - GENERAL D20 1,642,116 1,486 3,088 155 0 0 0 1175 SUBSTATIONS - DIRECT DA3602 22,840 0 0 0 0 1,720 21,114 1176 LINES - PRIMARY DEMAND D20 2,222,644 2,012 4,179 210 0 0 0 1177 LINES - PRIMARY CUSTOMER C20 1,101,574 3,058 5,480 1,409 0 0 0 1178 LINES - SECONDARY DIRECT DA3647 138,894 0 0 0 0 18,871 0 1179 LINE TRANS - PRIMARY DEMAND D50 499,968 453 940 47 0 0 0 1180 LINE TRANS - PRIMARY CUST C50 247,791 688 1,233 317 0 0 0 1181 LINE TRANS - SECOND DIRECT DA368 138,561 0 0 0 0 8,038 0 1182 LINE TRANS - SECOND DEMAND D60 1,445,968 1,537 3,194 161 0 0 0 1183 LINE TRANS - SECOND CUSTOMER C60 716,642 1,991 3,568 917 0 0 0 1184 LINES - SECONDARY DEMAND D30 142,440 221 459 23 0 0 0 1185 LINES - SECONDARY CUSTOMER C30 70,595 203 363 93 0 0 0 1186 SERVICES CW369 289,873 0 0 0 0 17 0 1187 METERS CW370 487,913 6 1,016 472 129 318 1,638 1188 STREET LIGHTS DA373 26,233 0 26,177 0 0 0 0 1189 INSTALL ON CUST PREMISES CWINSTAL 18,723 45 81 21 0 0 0 1190 1191 CUSTOMER ACCOUNTING 1192 METER READING CW902 0 0 0 0 0 0 0 1193 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 1194 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 1195 MISC C10 0 0 0 0 0 0 0 1196 1197 CONSUMER INFORMATION 1198 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 1199 SALES EXPENSE C10 0 0 0 0 0 0 0 1200 ADVERTISING C10 0 0 0 0 0 0 0 1201 MISC C10 0 0 0 0 0 0 0 1202 1203 MISCELLANEOUS 1204 DEMAND D99U 0 0 0 0 0 0 0 1205 ENERGY E99U 0 0 0 0 0 0 0 1206 CUSTOMER C10 0 0 0 0 0 0 0 1207 REVENUE R02 0 0 0 0 0 0 0 1208 OTHER R01 0 0 0 0 0 0 0 1209 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 1210 1211 TOTALS PAGE 3I 23,926,476 21,651 49,777 5,857 176,815 142,577 522,956 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 40 of 48 1212 IDAHO POWER COMPANY PAGE 3J 1213 3CP/12CP CLASS COST OF SERVICE STUDY 1214 TWELVE MONTHS ENDING DECEMBER 31, 2023 1215 *** TABLE 20 - CONSTRUCTION WORK IN PROGRESS ***ALLOCATION TO C TION TO CLASSES 1216 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 1217 FUNCTION ALLOCATION TOTALS RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 1218 FACTOR RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING EC/PRIM/TRA SECONDARY 1219 (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 1220 DEMAND - BASE-LOAD TOTAL 6,537,444 1221 DEMAND - Base-load Summer D10BS 2,809,262 1,159,595 28,387 21,416 75 82,632 488,311 0 282,542 621,604 1222 DEMAND - Peak D10P 0 0 0 0 0 0 0 0 0 0 1223 DEMAND - Base-load Non-Summer D10BNS 3,728,182 1,636,411 45,495 37,510 190 149,441 894,784 0 548,568 177,424 1224 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 0 0 0 1225 ENERGY - Summer E10S 0 0 0 0 0 0 0 0 0 0 1226 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 0 0 0 1227 1228 TRANSMISSION 1229 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 1230 DEMAND - TRANSMISSION D13 0 0 0 0 0 0 0 0 0 0 1231 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 1232 DEMAND - DIRECT DA3509 0 0 0 0 0 0 0 0 0 0 1233 1234 DISTRIBUTION 0 1235 SUBSTATIONS - GENERAL D20 0 0 0 0 0 0 0 0 0 0 1236 SUBSTATIONS - DIRECT DA3602 0 0 0 0 0 0 0 0 0 0 1237 LINES - PRIMARY DEMAND D20 0 0 0 0 0 0 0 0 0 0 1238 LINES - PRIMARY CUSTOMER C20 0 0 0 0 0 0 0 0 0 0 1239 LINES - SECONDARY DIRECT DA3647 0 0 0 0 0 0 0 0 0 0 1240 LINE TRANS - PRIMARY DEMAND D50 0 0 0 0 0 0 0 0 0 0 1241 LINE TRANS - PRIMARY CUST C50 0 0 0 0 0 0 0 0 0 0 1242 LINE TRANS - SECOND DIRECT DA368 0 0 0 0 0 0 0 0 0 0 1243 LINE TRANS - SECOND DEMAND D60 0 0 0 0 0 0 0 0 0 0 1244 LINE TRANS - SECOND CUSTOMER C60 0 0 0 0 0 0 0 0 0 0 1245 LINES - SECONDARY DEMAND D30 0 0 0 0 0 0 0 0 0 0 1246 LINES - SECONDARY CUSTOMER C30 0 0 0 0 0 0 0 0 0 0 1247 SERVICES CW369 0 0 0 0 0 0 0 0 0 0 1248 METERS CW370 0 0 0 0 0 0 0 0 0 0 1249 STREET LIGHTS DA373 0 0 0 0 0 0 0 0 0 0 1250 INSTALL ON CUST PREMISES CWINSTAL 0 0 0 0 0 0 0 0 0 0 1251 1252 CUSTOMER ACCOUNTING 0 1253 METER READING CW902 0 0 0 0 0 0 0 0 0 0 1254 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 0 0 0 1255 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 0 0 0 1256 MISC C10 0 0 0 0 0 0 0 0 0 0 1257 1258 CONSUMER INFORMATION 0 1259 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 0 0 0 1260 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 1261 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 1262 MISC C10 0 0 0 0 0 0 0 0 0 0 1263 1264 MISCELLANEOUS 0 1265 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 1266 ENERGY E99U 0 0 0 0 0 0 0 0 0 0 1267 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 1268 REVENUE R02 0 0 0 0 0 0 0 0 0 0 1269 OTHER R01 0 0 0 0 0 0 0 0 0 0 1270 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 0 0 0 1271 1272 TOTALS PAGE 3J 6,537,444 2,796,006 73,882 58,927 265 232,072 1,383,095 0 831,110 799,028 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 41 of 48 1212 IDAHO POWER COMPANY 1213 3CP/12CP CLASS COST OF SERVICE STUDY 1214 TWELVE MONTHS ENDING DECEMBER 31, 2023 1215 *** TABLE 20 - CONSTRUCTION WORK IN PROGRESS ***ALLOCATION TO CLASSES 1216 (K) (L) (M) (N) (O) (P) 1217 FUNCTION ALLOCATION TOTALS UNMETERED MUNICIPAL TRAFFIC SC SC SC 1218 FACTOR GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 1219 (40) (41) (42) 1220 DEMAND - BASE-LOAD TOTAL 6,537,444 1221 DEMAND - Base-load Summer D10BS 2,809,262 1,517 0 303 20,209 19,421 83,250 1222 DEMAND - Peak D10P 0 0 0 0 0 0 0 1223 DEMAND - Base-load Non-Summer D10BNS 3,728,182 2,992 0 619 61,388 31,605 141,754 1224 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 1225 ENERGY - Summer E10S 0 0 0 0 0 0 0 1226 ENERGY - Non-Summer E10NS 0 0 0 0 0 0 0 1227 1228 TRANSMISSION 0 1229 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 1230 DEMAND - TRANSMISSION D13 0 0 0 0 0 0 0 1231 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 1232 DEMAND - DIRECT DA3509 0 0 0 0 0 0 0 1233 1234 DISTRIBUTION 1235 SUBSTATIONS - GENERAL D20 0 0 0 0 0 0 0 1236 SUBSTATIONS - DIRECT DA3602 0 0 0 0 0 0 0 1237 LINES - PRIMARY DEMAND D20 0 0 0 0 0 0 0 1238 LINES - PRIMARY CUSTOMER C20 0 0 0 0 0 0 0 1239 LINES - SECONDARY DIRECT DA3647 0 0 0 0 0 0 0 1240 LINE TRANS - PRIMARY DEMAND D50 0 0 0 0 0 0 0 1241 LINE TRANS - PRIMARY CUST C50 0 0 0 0 0 0 0 1242 LINE TRANS - SECOND DIRECT DA368 0 0 0 0 0 0 0 1243 LINE TRANS - SECOND DEMAND D60 0 0 0 0 0 0 0 1244 LINE TRANS - SECOND CUSTOMER C60 0 0 0 0 0 0 0 1245 LINES - SECONDARY DEMAND D30 0 0 0 0 0 0 0 1246 LINES - SECONDARY CUSTOMER C30 0 0 0 0 0 0 0 1247 SERVICES CW369 0 0 0 0 0 0 0 1248 METERS CW370 0 0 0 0 0 0 0 1249 STREET LIGHTS DA373 0 0 0 0 0 0 0 1250 INSTALL ON CUST PREMISES CWINSTAL 0 0 0 0 0 0 0 1251 1252 CUSTOMER ACCOUNTING 1253 METER READING CW902 0 0 0 0 0 0 0 1254 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 1255 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 1256 MISC C10 0 0 0 0 0 0 0 1257 1258 CONSUMER INFORMATION 1259 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 1260 SALES EXPENSE C10 0 0 0 0 0 0 0 1261 ADVERTISING C10 0 0 0 0 0 0 0 1262 MISC C10 0 0 0 0 0 0 0 1263 1264 MISCELLANEOUS 1265 DEMAND D99U 0 0 0 0 0 0 0 1266 ENERGY E99U 0 0 0 0 0 0 0 1267 CUSTOMER C10 0 0 0 0 0 0 0 1268 REVENUE R02 0 0 0 0 0 0 0 1269 OTHER R01 0 0 0 0 0 0 0 1270 SUBSTATION CIAC CIAC 0 0 0 0 0 0 0 1271 1272 TOTALS PAGE 3J 6,537,444 4,509 0 922 81,598 51,026 225,005 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 42 of 48 1273 IDAHO POWER COMPANY 1274 3CP/12CP CLASS COST OF SERVICE STUDY 1275 TWELVE MONTHS ENDING DECEMBER 31, 2023 1276 *** TABLE 21 - STATE INCOME TAXES ***ALLOCATION TO C TION TO CLASSES 1277 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 1278 FUNCTION ALLOCATION TOTALS RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 1279 FACTOR RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING EC/PRIM/TRA SECONDARY 1280 PRODUCTION (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 1281 DEMAND - Base-load Summer D10BS (383,179) (118,263) (1,799) (1,751) (2) (15,224) (83,343) 0 (64,889) (62,353) 1282 DEMAND - Peak D10P (91,720) (28,308) (431) (419) (0) (3,644) (19,949) 0 (15,532) (14,925) 1283 DEMAND - Base-load Non-Summer D10BNS (566,047) (166,891) (2,884) (3,067) (4) (27,533) (152,718) 0 (125,985) (17,797) 1284 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 0 0 0 1285 ENERGY - Summer E10S (15,494) (3,334) (52) (69) (0) (709) (3,601) (1) (3,326) (2,748) 1286 ENERGY - Non-Summer E10NS (27,978) (7,515) (138) (152) (0) (1,367) (7,368) (2) (6,946) (623) 1287 0 1288 TRANSMISSION 0 1289 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 1290 DEMAND - TRANSMISSION D13 (720,621) (216,835) (3,536) (3,635) (5) (32,117) (177,395) 0 (143,004) (65,739) 1291 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 1292 DEMAND - DIRECT DA3509 (57) 0 0 0 0 (57) 0 0 0 0 1293 0 1294 DISTRIBUTION 0 1295 SUBSTATIONS - GENERAL D20 (250,558) (74,595) (2,216) (1,298) (5) (10,576) (57,086) (18) (52,687) (51,565) 1296 SUBSTATIONS - DIRECT DA3602 (30,246) 0 0 0 0 0 0 0 (6) 0 1297 LINES - PRIMARY DEMAND D20 (238,999) (71,154) (2,114) (1,238) (5) (10,089) (54,453) (17) (50,257) (49,186) 1298 LINES - PRIMARY CUSTOMER C20 (94,933) (76,272) (1,279) (3,774) (3) (78) (9,788) 0 (40) (2,921) 1299 LINES - SECONDARY DIRECT DA3647 (27,110) 0 0 0 0 (6,002) 0 (37) (16,362) 0 1300 LINE TRANS - PRIMARY DEMAND D50 (61,868) (18,419) (547) (321) (1) (2,612) (14,096) (5) (13,010) (12,733) 1301 LINE TRANS - PRIMARY CUST C50 (24,575) (19,744) (331) (977) (1) (20) (2,534) 0 (10) (756) 1302 LINE TRANS - SECOND DIRECT DA368 (28,321) 0 0 0 0 (9,612) 0 0 (16,535) 0 1303 LINE TRANS - SECOND DEMAND D60 (157,241) (62,570) (1,859) (1,089) (5) 0 (47,884) (15) (139) (43,253) 1304 LINE TRANS - SECOND CUSTOMER C60 (71,027) (57,136) (958) (2,827) (2) 0 (7,332) 0 (0) (2,188) 1305 LINES - SECONDARY DEMAND D30 (13,939) (7,651) (227) (133) (1) 0 (5,855) (2) (17) 0 1306 LINES - SECONDARY CUSTOMER C30 (5,967) (4,953) (83) (245) (0) 0 (636) 0 (0) 0 1307 SERVICES CW369 (14,235) (10,983) (184) (578) (0) (74) (1,736) 0 (132) (545) 1308 METERS CW370 (50,838) (26,393) (437) (2,003) (1) (1,971) (13,412) (0) (1,705) (4,289) 1309 STREET LIGHTS DA373 (2,328) 0 0 0 0 (13) 0 0 (0) 0 1310 INSTALL ON CUST PREMISES DA371 (452) 0 0 0 0 (3) 0 (447) (2) 0 1311 0 1312 CUSTOMER ACCOUNTING 0 1313 METER READING CW902 (0) (0) (0) (0) (0) (0) (0) 0 (0) (0) 1314 CUSTOMER ACCOUNTS CW903 (0) (0) (0) (0) (0) (0) (0) 0 (0) (0) 1315 UNCOLLECTIBLES CW904 (0) (0) (0) (0) 0 (0) (0) 0 (0) (0) 1316 MISC C10 0 0 0 0 0 0 0 0 0 0 1317 0 1318 CONSUMER INFORMATION 0 1319 CUSTOMER ASSIST C10 (0) (0) (0) (0) (0) (0) (0) 0 (0) (0) 1320 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 1321 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 1322 MISC C10 0 0 0 0 0 0 0 0 0 0 1323 0 1324 MISCELLANEOUS 0 1325 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 1326 ENERGY E99U 0 0 0 0 0 0 0 0 0 0 1327 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 1328 REVENUE R02 0 0 0 0 0 0 0 0 0 0 1329 OTHER INTFUND (0) (0) (0) (0) (0) (0) (0) (0) (0) (0) 1330 SUBSTATION CIAC CIAC 49,300 2,332 69 206 1 1,492 2,363 1 19,288 1,626 1331 1332 TOTALS (2,828,435) (968,684) (19,005) (23,371)(36) (120,210) (656,822) (544) (491,297) (329,996) Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 43 of 48 1273 IDAHO POWER COMPANY 1274 3CP/12CP CLASS COST OF SERVICE STUDY 1275 TWELVE MONTHS ENDING DECEMBER 31, 2023 1276 *** TABLE 21 - STATE INCOME TAXES ***ALLOCATION TO CLASSES 1277 (A) (K) (L) (M) (N) (O) (P) 1278 FUNCTION ALLOCATION TOTALS UNMETERED MUNICIPAL TRAFFIC SC SC SC 1279 FACTOR GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 1280 PRODUCTION (40) (41) (42) 1281 DEMAND - Base-load Summer D10BS (383,179) (210) 0 (29) (6,723) (5,522) (23,071) 1282 DEMAND - Peak D10P (91,720) (50) 0 (7) (1,609) (1,322) (5,522) 1283 DEMAND - Base-load Non-Summer D10BNS (566,047) (415) 0 (60) (20,422) (8,986) (39,284) 1284 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 1285 ENERGY - Summer E10S (15,494) (12) (10) (2) (347) (282) (1,002) 1286 ENERGY - Non-Summer E10NS (27,978) (25) (22) (4) (1,111) (636) (2,070) 1287 1288 TRANSMISSION 1289 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 1290 DEMAND - TRANSMISSION D13 (720,621) (468) 0 (67) (19,888) (10,940) (46,994) 1291 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 1292 DEMAND - DIRECT DA3509 (57) 0 0 0 0 0 0 1293 1294 DISTRIBUTION 1295 SUBSTATIONS - GENERAL D20 (250,558) (242) (251) (18) 0 0 0 1296 SUBSTATIONS - DIRECT DA3602 (30,246) 0 0 0 0 (2,332) (27,907) 1297 LINES - PRIMARY DEMAND D20 (238,999) (230) (240) (17) 0 0 0 1298 LINES - PRIMARY CUSTOMER C20 (94,933) (350) (314) (113) 0 0 0 1299 LINES - SECONDARY DIRECT DA3647 (27,110) 0 0 0 0 (4,708) 0 1300 LINE TRANS - PRIMARY DEMAND D50 (61,868) (60) (62) (4) 0 0 0 1301 LINE TRANS - PRIMARY CUST C50 (24,575) (91) (81) (29) 0 0 0 1302 LINE TRANS - SECOND DIRECT DA368 (28,321) 0 0 0 0 (2,174) 0 1303 LINE TRANS - SECOND DEMAND D60 (157,241) (203) (211) (15) 0 0 0 1304 LINE TRANS - SECOND CUSTOMER C60 (71,027) (262) (235) (84) 0 0 0 1305 LINES - SECONDARY DEMAND D30 (13,939) (25) (26) (2) 0 0 0 1306 LINES - SECONDARY CUSTOMER C30 (5,967) (23) (20) (7) 0 0 0 1307 SERVICES CW369 (14,235) 0 0 0 0 (2) 0 1308 METERS CW370 (50,838) (1) (63) (41) (38) (80) (403) 1309 STREET LIGHTS DA373 (2,328) 0 (2,315) 0 0 0 0 1310 INSTALL ON CUST PREMISES CWINSTAL (452) 0 0 0 0 0 0 1311 1312 CUSTOMER ACCOUNTING 1313 METER READING CW902 (0) 0 (0) 0 (0) (0) (0) 1314 CUSTOMER ACCOUNTS CW903 (0) (0) (0) (0) (0) (0) (0) 1315 UNCOLLECTIBLES CW904 (0) 0 0 0 0 0 0 1316 MISC C10 0 0 0 0 0 0 0 1317 1318 CONSUMER INFORMATION 1319 CUSTOMER ASSIST C10 (0) (0) (0) (0) (0) (0) (0) 1320 SALES EXPENSE C10 0 0 0 0 0 0 0 1321 ADVERTISING C10 0 0 0 0 0 0 0 1322 MISC C10 0 0 0 0 0 0 0 1323 1324 MISCELLANEOUS 1325 DEMAND D99U 0 0 0 0 0 0 0 1326 ENERGY E99U 0 0 0 0 0 0 0 1327 CUSTOMER C10 0 0 0 0 0 0 0 1328 REVENUE R02 0 0 0 0 0 0 0 1329 OTHER INTFUND (0) (0) (0) (0) (0) (0) (0) 1330 SUBSTATION CIAC 0 49,300 7 8 1 0 106 21,801 1331 1332 TOTALS (2,828,435) (2,659) (3,843) (497) (50,139) (36,879) (124,454) Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 44 of 48 1333 IDAHO POWER COMPANY 1334 3CP/12CP CLASS COST OF SERVICE STUDY 1335 TWELVE MONTHS ENDING DECEMBER 31, 2023 1336 *** TABLE 22 - FEDERAL INCOME TAXES ***ALLOCATION TO CLASSES 1337 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 1338 FUNCTION ALLOCATION TOTALS RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 1339 FACTOR RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING EC/PRIM/TRA SECONDARY 1340 PRODUCTION (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 1341 DEMAND - Base-load Summer D10BS 5,288,935 1,632,350 24,835 24,167 24 210,137 1,150,364 0 895,648 860,644 1342 DEMAND - Peak D10P 1,265,989 390,728 5,945 5,785 6 50,300 275,357 0 214,387 206,008 1343 DEMAND - Base-load Non-Summer D10BNS 7,813,019 2,303,558 39,803 42,327 61 380,036 2,107,934 0 1,738,943 245,653 1344 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 0 0 0 1345 ENERGY - Summer E10S 213,866 46,022 723 955 1 9,793 49,701 11 45,902 37,926 1346 ENERGY - Non-Summer E10NS 386,177 103,729 1,903 2,092 3 18,865 101,694 24 95,867 8,601 1347 0 1348 TRANSMISSION 0 1349 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 1350 DEMAND - TRANSMISSION D13 9,946,572 2,992,926 48,801 50,168 63 443,306 2,448,543 0 1,973,854 907,374 1351 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 1352 DEMAND - DIRECT DA3509 789 0 0 0 0 789 0 0 0 0 1353 0 1354 DISTRIBUTION 0 1355 SUBSTATIONS - GENERAL D20 3,458,399 1,029,618 30,586 17,920 75 145,984 787,948 252 727,230 711,741 1356 SUBSTATIONS - DIRECT DA3602 417,480 0 0 0 0 0 0 0 87 0 1357 LINES - PRIMARY DEMAND D20 3,298,856 982,120 29,175 17,093 71 139,249 751,598 240 693,682 678,906 1358 LINES - PRIMARY CUSTOMER C20 1,310,339 1,052,767 17,654 52,095 43 1,081 135,098 0 549 40,325 1359 LINES - SECONDARY DIRECT DA3647 374,195 0 0 0 0 82,843 0 515 225,847 0 1360 LINE TRANS - PRIMARY DEMAND D50 853,955 254,235 7,552 4,425 18 36,047 194,562 62 179,569 175,744 1361 LINE TRANS - PRIMARY CUST C50 339,199 272,523 4,570 13,485 11 280 34,972 0 142 10,439 1362 LINE TRANS - SECOND DIRECT DA368 390,912 0 0 0 0 132,668 0 0 228,234 0 1363 LINE TRANS - SECOND DEMAND D60 2,170,366 863,643 25,656 15,031 63 0 660,930 211 1,914 597,008 1364 LINE TRANS - SECOND CUSTOMER C60 980,364 788,633 13,224 39,024 32 0 101,202 0 4 30,207 1365 LINES - SECONDARY DEMAND D30 192,396 105,609 3,137 1,838 8 0 80,821 26 234 0 1366 LINES - SECONDARY CUSTOMER C30 82,364 68,363 1,146 3,383 3 0 8,773 0 0 0 1367 SERVICES CW369 196,481 151,600 2,538 7,983 6 1,016 23,968 0 1,821 7,517 1368 METERS CW370 701,699 364,298 6,033 27,648 18 27,209 185,122 1 23,540 59,204 1369 STREET LIGHTS DA373 32,134 0 0 0 0 179 0 0 3 0 1370 INSTALL ON CUST PREMISES 6,242 0 0 0 0 37 0 6,173 33 0 1371 0 1372 CUSTOMER ACCOUNTING 0 1373 METER READING CW902 0 0 0 0 0 0 0 0 0 0 1374 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 0 0 0 1375 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 (0) 0 0 1376 MISC C10 0 0 0 0 0 0 0 0 0 0 1377 0 1378 CONSUMER INFORMATION 0 1379 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 0 0 0 1380 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 1381 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 1382 MISC C10 0 0 0 0 0 0 0 0 0 0 1383 0 1384 MISCELLANEOUS 0 1385 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 1386 ENERGY E99U 0 0 0 0 0 0 0 0 0 0 1387 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 1388 REVENUE R02 0 0 0 0 0 0 0 0 0 0 1389 OTHER DA454 0 0 0 0 0 0 0 0 0 0 1390 SUBSTATION CIAC CIAC (680,484) (32,192) (956) (2,839) (12) (20,592) (32,616) (8) (266,231) (22,440) 1391 1392 TOTALS 39,040,245 13,370,532 262,324 322,579 494 1,659,227 9,065,970 7,507 6,781,260 4,554,856 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 45 of 48 1333 IDAHO POWER COMPANY 1334 3CP/12CP CLASS COST OF SERVICE STUDY 1335 TWELVE MONTHS ENDING DECEMBER 31, 2023 1336 *** TABLE 22 - FEDERAL INCOME TAXES ***ALLOCATION TO CLASSES 1337 (A) (K) (L) (M) (N) (O) (P) 1338 FUNCTION ALLOCATION TOTALS UNMETERED MUNICIPAL TRAFFIC SC SC SC 1339 FACTOR GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 1340 PRODUCTION (40) (41) (42) 1341 DEMAND - Base-load Summer D10BS 5,288,935 2,904 0 405 92,797 76,215 318,445 1342 DEMAND - Peak D10P 1,265,989 695 0 97 22,212 18,243 76,225 1343 DEMAND - Base-load Non-Summer D10BNS 7,813,019 5,729 0 827 281,883 124,030 542,233 1344 ENERGY - POWER SUPPLY E10 0 0 0 0 0 0 0 1345 ENERGY - Summer E10S 213,866 164 132 23 4,789 3,889 13,835 1346 ENERGY - Non-Summer E10NS 386,177 348 306 50 15,340 8,779 28,576 1347 1348 TRANSMISSION 1349 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 1350 DEMAND - TRANSMISSION D13 9,946,572 6,456 0 920 274,505 151,007 648,649 1351 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 1352 DEMAND - DIRECT DA3509 789 0 0 0 0 0 0 1353 1354 DISTRIBUTION 1355 SUBSTATIONS - GENERAL D20 3,458,399 3,334 3,469 243 0 0 0 1356 SUBSTATIONS - DIRECT DA3602 417,480 0 0 0 0 32,194 385,198 1357 LINES - PRIMARY DEMAND D20 3,298,856 3,180 3,309 232 0 0 0 1358 LINES - PRIMARY CUSTOMER C20 1,310,339 4,835 4,339 1,555 0 0 0 1359 LINES - SECONDARY DIRECT DA3647 374,195 0 0 0 0 64,990 0 1360 LINE TRANS - PRIMARY DEMAND D50 853,955 823 857 60 0 0 0 1361 LINE TRANS - PRIMARY CUST C50 339,199 1,252 1,123 403 0 0 0 1362 LINE TRANS - SECOND DIRECT DA368 390,912 0 0 0 0 30,010 0 1363 LINE TRANS - SECOND DEMAND D60 2,170,366 2,797 2,910 204 0 0 0 1364 LINE TRANS - SECOND CUSTOMER C60 980,364 3,622 3,250 1,165 0 0 0 1365 LINES - SECONDARY DEMAND D30 192,396 342 356 25 0 0 0 1366 LINES - SECONDARY CUSTOMER C30 82,364 314 282 101 0 0 0 1367 SERVICES CW369 196,481 0 0 0 0 32 0 1368 METERS CW370 701,699 10 864 559 527 1,108 5,558 1369 STREET LIGHTS DA373 32,134 0 31,953 0 0 0 0 1370 INSTALL ON CUST PREMISES CWINSTAL 6,242 0 0 0 0 0 0 1371 1372 CUSTOMER ACCOUNTING 1373 METER READING CW902 0 0 0 0 0 0 0 1374 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 1375 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 1376 MISC C10 0 0 0 0 0 0 0 1377 1378 CONSUMER INFORMATION 1379 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 1380 SALES EXPENSE C10 0 0 0 0 0 0 0 1381 ADVERTISING C10 0 0 0 0 0 0 0 1382 MISC C10 0 0 0 0 0 0 0 1383 0 1384 MISCELLANEOUS 0 1385 DEMAND D99U 0 0 0 0 0 0 0 1386 ENERGY E99U 0 0 0 0 0 0 0 1387 CUSTOMER C10 0 0 0 0 0 0 0 1388 REVENUE R02 0 0 0 0 0 0 0 1389 OTHER INTFUND 0 0 0 0 0 0 0 1390 SUBSTATION CIAC 0 (680,484) (103) (108) (8) 0 (1,470) (300,909) 1391 1392 TOTALS 39,040,245 36,701 53,040 6,863 692,053 509,028 1,717,811 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 46 of 48 1 IDAHO PAGE 3L 2 3CP/12CP 3 *** TABLE 23 - ALLOCATION FACTOR SUMMARY **TWELVE , 4 ALLOCATION 5 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 6 FUNCTION FACTOR TOTAL RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 7 NAME FACTOR RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING SEC/PRIM/TRAN SECONDARY 8 PRODUCTION (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 9 DEMAND - Base-load Summer D10BS 0.4297 0.1774 0.0043 0.0033 0.0000 0.0126 0.0747 0.0000 0.0432 0.0951 10 DEMAND - Peak D10P 1.0000 0.4128 0.0101 0.0076 0.0000 0.0294 0.1738 0.0000 0.1006 0.2213 11 DEMAND - Base-load Non-Summer D10BNS 0.5703 0.2503 0.0070 0.0057 0.0000 0.0229 0.1369 0.0000 0.0839 0.0271 12 DEMAND - BASE-LOAD TOTAL D10B 1.0000 0.4277 0.0113 0.0090 0.0000 0.0355 0.2116 0.0000 0.1271 0.1222 13 ENERGY - POWER SUPPLY E10 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 14 ENERGY - Summer E10S 0.3751 0.1145 0.0029 0.0030 0.0000 0.0135 0.0739 0.0001 0.0507 0.0959 15 ENERGY - Non-Summer E10NS 0.6249 0.2581 0.0076 0.0065 0.0000 0.0260 0.1512 0.0002 0.1059 0.0218 16 ENERGY - ANNUAL E10 1.0000 0.3726 0.0105 0.0095 0.0000 0.0395 0.2251 0.0004 0.1566 0.1177 17 TRANSMISSION 18 DEMAND - POWER SUPPLY D11 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 19 DEMAND - TRANSMISSION D13 1.0000 0.4261 0.0112 0.0089 0.0000 0.0349 0.2083 0.0000 0.1248 0.1313 20 DEMAND - SUBTRANSMISSION D15 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 21 DEMAND - DIRECT DA3509 1,189 0 0 0 0 1,189 0 0 0 0 22 23 DISTRIBUTION 24 SUBSTATIONS - GENERAL D20 3,880,868 1,475,249 70,513 32,030 470 115,783 674,613 1,488 462,715 1,036,831 25 SUBSTATIONS - DIRECT DA3602 18,842,265 0 0 0 0 0 0 0 4,766 0 26 LINES - PRIMARY DEMAND D20 3,880,868 1,475,249 70,513 32,030 470 115,783 674,613 1,488 462,715 1,036,831 27 LINES - PRIMARY CUSTOMER C20 599,002 492,481 13,288 30,401 88 280 37,764 0 114 19,179 28 LINES - SECONDARY DIRECT DA3647 30,302,718 0 0 0 0 8,098,475 0 375,286 17,711,924 0 29 LINE TRANS - PRIMARY DEMAND D50 3,880,868 1,475,249 70,513 32,030 470 115,783 674,613 1,488 462,715 1,036,831 30 LINE TRANS - PRIMARY CUST C50 599,002 492,481 13,288 30,401 88 280 37,764 0 114 19,179 31 LINE TRANS - SECOND DIRECT DA368 30,269,678 0 0 0 0 11,979,958 0 0 16,533,677 0 32 LINE TRANS - SECOND DEMAND D60 3,303,822 1,475,249 70,513 32,030 470 0 674,613 1,488 1,452 1,036,831 33 LINE TRANS - SECOND CUSTOMER C60 598,609 492,481 13,288 30,401 88 0 37,764 0 1 19,179 34 LINES - SECONDARY DEMAND D30 2,266,991 1,475,249 70,513 32,030 470 0 674,613 1,488 1,452 0 35 LINES - SECONDARY CUSTOMER C30 579,430 492,481 13,288 30,401 88 0 37,764 0 1 0 36 SERVICES CW369 66,979,720 53,720,684 1,446,874 3,528,835 9,999 199,332 5,075,064 0 286,563 2,708,349 37 METERS CW370 97,044,854 58,015,722 1,545,886 5,492,681 12,640 2,398,611 17,616,298 435 1,664,741 9,586,021 38 STREET LIGHTS DA373 5,478,881 0 0 0 0 11,531 0 0 141 0 39 INSTALL ON CUST PREMISES DA371 4,591,211 0 0 0 0 3,662 0 4,584,924 2,625 0 40 INSTALL ON CUST PREM CWINSTAL 1,324,335 941,483 25,402 58,118 167 543 72,193 179,202 222 36,665 41 CUSTOMER ACCOUNTING 42 METER READING CW902 1,772,999 1,357,370 26,946 106,387 258 50,454 114,853 0 20,596 93,489 43 CUSTOMER ACCOUNTS CW903 16,082,040 13,155,938 354,963 812,117 2,337 64,177 1,008,800 0 26,199 512,338 44 UNCOLLECTIBLES CW904 5,389,398 4,833,685 2,063 205,647 0 1,917 254,719 (3) 25,819 65,550 45 MISC C10 599,011 492,481 13,288 30,401 88 284 37,764 0 116 19,179 46 47 CONSUMER INFORMATION 48 CUSTOMER ASSIST C10 599,011 492,481 13,288 30,401 88 284 37,764 0 116 19,179 49 SALES EXPENSE C10 599,011 492,481 13,288 30,401 88 284 37,764 0 116 19,179 50 ADVERTISING C10 599,011 492,481 13,288 30,401 88 284 37,764 0 116 19,179 51 MISC C10 599,011 492,481 13,288 30,401 88 284 37,764 0 116 19,179 52 53 MISCELLANEOUS 54 DEMAND D99U 23,186,898 0 0 0 0 1,565,362 11,142,321 0 4,706,101 4,065,427 55 ENERGY E99U 14,907,835,244 5,425,559,433 122,912,496 138,285,160 370,708 601,699,182 3,321,544,618 5,267,423 2,386,695,635 1,864,522,772 56 CUSTOMER C10 599,011 492,481 13,288 30,401 88 284 37,764 0 116 19,179 57 MISC. REVENUE R02 4,327,695 3,867,051 20,825 136,296 112 1,349 137,585 7,800 28 80,047 58 RETAIL SALES REVENUE R01 1,116,166,332 501,479,142 11,567,368 16,102,622 43,713 36,446,763 230,482,910 1,261,853 125,751,566 140,327,749 59 REVENUE - OPEN 0 0 0 0 0 0 0 0 0 0 0 60 SUBSTATION CIAC CIAC (42,770,847) (4,292,179) (205,156) (472,238) (6,923) (1,519,756) (2,598,489) (4,296) (15,762,856) (3,041,944) 61 FACILITIES CHARGE REVENUE DA454 9,862,380 0 0 0 0 3,310,051 0 74,757 5,559,630 0 62 INTERVENOR FUNDING INTFUND 291,838 186,225 5,060 7,677 23 2,524 14,289 23 9,992 66,025 Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 47 of 48 1 IDAHO PAGE 3L 2 3CP/12CP 3 *** TABLE 23 - ALLOCATION FACTOR SUMMARY **TWELVE , 4 ALLOCATION 5 (K) (L) (M) (N) (O) (P) 6 FUNCTION FACTOR TOTAL UNMETERED MUNICIPAL TRAFFIC SC 7 NAME FACTOR GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 8 PRODUCTION (40) (41) (42) 9 DEMAND - Base-load Summer D10BS 0.4297 0.0002 0.0000 0.0000 0.0031 0.0030 0.0127 10 DEMAND - Peak D10P 1.0000 0.0005 0.0000 0.0001 0.0072 0.0069 0.0296 11 DEMAND - Base-load Non-Summer D10BNS 0.5703 0.0005 0.0000 0.0001 0.0094 0.0048 0.0217 12 DEMAND - BASE-LOAD TOTAL D10B 1.0000 0.0007 0.0000 0.0001 0.0125 0.0078 0.0344 13 ENERGY - POWER SUPPLY E10 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 14 ENERGY - Summer E10S 0.3751 0.0003 0.0005 0.0001 0.0037 0.0035 0.0127 15 ENERGY - Non-Summer E10NS 0.6249 0.0006 0.0011 0.0001 0.0117 0.0078 0.0262 16 ENERGY - ANNUAL E10 1.0000 0.0009 0.0016 0.0002 0.0154 0.0113 0.0388 17 TRANSMISSION 0.0000 18 DEMAND - POWER SUPPLY D11 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 19 DEMAND - TRANSMISSION D13 1.0000 0.0007 0.0000 0.0001 0.0120 0.0077 0.0340 20 DEMAND - SUBTRANSMISSION D15 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 21 DEMAND - DIRECT DA3509 1,189 0 0 0 0 0 0 22 23 DISTRIBUTION 24 SUBSTATIONS - GENERAL D20 3,880,868 3,513 7,298 367 0 0 0 25 SUBSTATIONS - DIRECT DA3602 18,842,265 0 0 0 0 1,418,979 17,418,519 26 LINES - PRIMARY DEMAND D20 3,880,868 3,513 7,298 367 0 0 0 27 LINES - PRIMARY CUSTOMER C20 599,002 1,663 2,980 766 0 0 0 28 LINES - SECONDARY DIRECT DA3647 30,302,718 0 0 0 0 4,117,033 0 29 LINE TRANS - PRIMARY DEMAND D50 3,880,868 3,513 7,298 367 0 0 0 30 LINE TRANS - PRIMARY CUST C50 599,002 1,663 2,980 766 0 0 0 31 LINE TRANS - SECOND DIRECT DA368 30,269,678 0 0 0 0 1,756,043 0 32 LINE TRANS - SECOND DEMAND D60 3,303,822 3,513 7,298 367 0 0 0 33 LINE TRANS - SECOND CUSTOMER C60 598,609 1,663 2,980 766 0 0 0 34 LINES - SECONDARY DEMAND D30 2,266,991 3,513 7,298 367 0 0 0 35 LINES - SECONDARY CUSTOMER C30 579,430 1,663 2,980 766 0 0 0 36 SERVICES CW369 66,979,720 0 0 0 0 4,020 0 37 METERS CW370 97,044,854 1,156 202,057 93,796 25,733 63,315 325,761 38 STREET LIGHTS DA373 5,478,881 0 5,467,209 0 0 0 0 39 INSTALL ON CUST PREMISES DA371 4,591,211 0 0 0 0 0 0 40 INSTALL ON CUST PREM CWINSTAL 1,324,335 3,179 5,697 1,464 0 0 0 41 CUSTOMER ACCOUNTING 42 METER READING CW902 1,772,999 0 2,113 0 178 178 178 43 CUSTOMER ACCOUNTS CW903 16,082,040 44,425 79,607 20,463 226 226 226 44 UNCOLLECTIBLES CW904 5,389,398 0 0 0 0 0 0 45 MISC C10 599,011 1,663 2,980 766 1 1 1 46 47 CONSUMER INFORMATION 48 CUSTOMER ASSIST C10 599,011 1,663 2,980 766 1 1 1 49 SALES EXPENSE C10 599,011 1,663 2,980 766 1 1 1 50 ADVERTISING C10 599,011 1,663 2,980 766 1 1 1 51 MISC C10 599,011 1,663 2,980 766 1 1 1 52 53 MISCELLANEOUS 54 DEMAND D99U 23,186,898 0 0 0 422,686 267,258 1,017,744 55 ENERGY E99U 14,907,835,244 13,925,301 23,760,014 2,847,961 234,100,000 175,000,001 591,344,540 56 CUSTOMER C10 599,011 1,663 2,980 766 1 1 1 57 MISC. REVENUE R02 4,327,695 10,620 64,629 1,354 0 0 0 58 RETAIL SALES REVENUE R01 1,116,166,332 1,144,288 3,463,322 165,609 10,547,708 7,759,368 29,622,353 59 REVENUE - OPEN 0 0 0 0 0 0 0 0 60 SUBSTATION CIAC CIAC (42,770,847) (10,144) (21,076) (1,060) 0 (70,288) (14,764,441) 61 FACILITIES CHARGE REVENUE DA454 9,862,380 0 681 0 0 917,261 0 62 INTERVENOR FUNDING INTFUND Exhibit No. 39 Case No. IPC-E-23-11 P. Goralski, IPC Page 48 of 48 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CASE NO. IPC-E-23-11 IDAHO POWER COMPANY GORALSKI, DI TESTIMONY EXHIBIT NO. 40 1 IDAHO POWER COMPANY 2 3CP/12CP CLASS COST OF SERVICE STUDY 3 TWELVE MONTHS ENDING DECEMBER 31, 2023 4 **** SUMMARY OF RATE BASE ***ALLOCATION TO CLASSES 5 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 6 FUNCTION ALLOCATION TOTAL RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 7 FACTOR RATE BASE RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING SEC/PRIM/TRAN SECONDARY 8 PRODUCTION (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 9 DEMAND - Base-load Summer D10BS 527,258,819 217,639,709 5,327,764 4,019,546 14,076 15,508,781 91,649,034 0 53,029,099 116,666,267 10 DEMAND - Peak D10P 126,207,603 52,095,451 1,275,283 962,141 3,369 3,712,268 21,937,622 0 12,693,340 27,925,886 11 DEMAND - Base-load Non-Summer D10BNS 699,727,248 307,131,203 8,538,838 7,040,179 35,730 28,047,927 167,938,323 0 102,958,489 33,299,940 12 ENERGY - POWER SUPPLY E10 53,590,613 0 0 0 0 0 0 0 0 0 13 ENERGY - Summer E10S 20,103,456 6,136,134 155,020 158,813 581 722,760 3,959,697 5,959 2,717,729 5,141,089 14 ENERGY - Non-Summer E10NS 33,487,157 13,830,068 408,262 348,018 1,627 1,392,315 8,101,932 12,941 5,676,063 1,165,887 15 0 0 0 0 0 0 0 0 0 16 TRANSMISSION 17 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 18 DEMAND - TRANSMISSION D13 936,585,068 399,043,928 10,469,269 8,344,228 36,909 32,717,447 195,074,444 0 116,866,985 123,000,884 19 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 20 DEMAND - DIRECT DA3509 58,219 0 0 0 0 58,219 0 0 0 0 21 22 DISTRIBUTION 23 SUBSTATIONS - GENERAL D20 361,130,739 137,277,995 6,561,549 2,980,540 43,696 10,774,097 62,775,481 138,424 43,057,489 96,481,383 24 SUBSTATIONS - DIRECT DA3602 20,445,071 0 0 0 0 0 0 0 5,172 0 25 LINES - PRIMARY DEMAND D20 344,470,998 130,945,065 6,258,851 2,843,042 41,680 10,277,065 59,879,512 132,039 41,071,154 92,030,489 26 LINES - PRIMARY CUSTOMER C20 170,724,661 140,364,428 3,787,201 8,664,703 24,939 79,804 10,763,170 0 32,492 5,466,277 27 LINES - SECONDARY DIRECT DA3647 22,877,428 0 0 0 0 6,114,048 0 283,327 13,371,845 0 28 LINE TRANS - PRIMARY DEMAND D50 89,171,115 33,896,953 1,620,191 735,961 10,790 2,660,361 15,500,646 34,180 10,631,840 23,823,373 29 LINE TRANS - PRIMARY CUST C50 44,194,456 36,335,287 980,370 2,242,979 6,456 20,658 2,786,197 0 8,411 1,415,022 30 LINE TRANS - SECOND DIRECT DA368 24,739,733 0 0 0 0 9,791,349 0 0 13,513,152 0 31 LINE TRANS - SECOND DEMAND D60 257,875,737 115,148,739 5,503,825 2,500,076 36,652 0 52,656,053 116,110 113,304 80,928,554 32 LINE TRANS - SECOND CUSTOMER C60 127,806,834 105,147,731 2,837,012 6,490,775 18,682 0 8,062,748 0 214 4,094,817 33 LINES - SECONDARY DEMAND D30 21,637,720 14,080,790 673,027 305,718 4,482 0 6,438,966 14,198 13,855 0 34 LINES - SECONDARY CUSTOMER C30 10,723,958 9,114,716 245,926 562,652 1,619 0 698,918 0 19 0 35 SERVICES CW369 25,201,414 20,212,644 544,393 1,327,740 3,762 74,999 1,909,515 0 107,821 1,019,028 36 METERS CW370 81,247,077 48,571,435 1,294,234 4,598,536 10,582 2,008,145 14,748,569 365 1,393,740 8,025,528 37 STREET LIGHTS DA373 6,268,714 0 0 0 0 13,193 0 0 162 0 38 INSTALL ON CUST PREMISES DA371 3,397,445 0 0 0 0 2,710 0 3,392,793 1,942 0 39 CWINSTAL 0 0 0 0 0 0 0 0 0 40 CUSTOMER ACCOUNTING 41 METER READING CW902 0 0 0 0 0 0 0 0 0 0 42 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 0 0 0 43 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 (0) 0 0 44 MISC C10 0 0 0 0 0 0 0 0 0 0 45 46 CONSUMER INFORMATION 47 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 0 0 0 48 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 49 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 50 MISC C10 0 0 0 0 0 0 0 0 0 0 51 52 MISCELLANEOUS 53 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 54 ENERGY E99U 0 0 0 0 0 0 0 0 0 0 55 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 56 REVENUE R02 0 0 0 0 0 0 0 0 0 0 57 OTHER R01 0 0 0 0 0 0 0 0 0 0 58 SUBSTATION CIAC CIAC (42,770,847) (4,292,179) (205,156) (472,238) (6,923) (1,519,756) (2,598,489) (4,296) (15,762,857) (3,041,944) 59 60 TOTALS 3,912,569,823 1,782,680,096 56,275,860 53,653,411 288,712 122,456,391 722,282,341 4,126,040 401,501,460 617,442,481 Exhibit No. 40 Case No. IPC-E-23-11 P. Goralski IPC Page 1 of 6 1 IDAHO POWER COMPANY 2 3CP/12CP CLASS COST OF SERVICE STUDY 3 TWELVE MONTHS ENDING DECEMBER 31, 2023 4 **** SUMMARY OF RATE BASE ***ALLOCATION TO CLASSES 5 (K) (L) (M) (N) (O) (P) 6 FUNCTION ALLOCATION TOTAL UNMETERED MUNICIPAL TRAFFIC SC SC SC 7 FACTOR RATE BASE GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 8 PRODUCTION (40) (41) (42) 9 DEMAND - Base-load D10BS 527,258,819 284,709 0 56,908 3,792,994 3,645,036 15,624,896 10 DEMAND - Peak D10P 126,207,603 68,150 0 13,622 907,912 872,496 3,740,062 11 DEMAND - Not in Use D10BNS 699,727,248 561,596 0 116,176 11,521,727 5,931,831 26,605,289 12 ENERGY - POWER SUPPLY E10 53,590,613 0 0 0 0 0 0 13 ENERGY - Summer E10S 20,103,456 16,068 25,786 3,214 195,752 186,018 678,835 14 ENERGY - Non-Summer E10NS 33,487,157 34,090 59,894 7,052 627,011 419,862 1,402,134 15 0 0 0 0 0 0 0 0 16 TRANSMISSION 17 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 18 DEMAND - TRANSMISSION D13 936,585,068 632,856 0 129,230 11,220,178 7,221,998 31,826,711 19 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 20 DEMAND - DIRECT DA3509 58,219 0 0 0 0 0 0 21 0 22 DISTRIBUTION 0 23 SUBSTATIONS - GENERAL D20 361,130,739 326,855 679,070 34,160 0 0 0 24 SUBSTATIONS - DIRECT DA3602 20,445,071 0 0 0 0 1,539,683 18,900,216 25 LINES - PRIMARY DEMAND D20 344,470,998 311,776 647,743 32,584 0 0 0 26 LINES - PRIMARY CUSTOMER C20 170,724,661 473,980 849,345 218,322 0 0 0 27 LINES - SECONDARY DIRECT DA3647 22,877,428 0 0 0 0 3,108,207 0 28 LINE TRANS - PRIMARY DEMAND D50 89,171,115 80,708 167,677 8,435 0 0 0 29 LINE TRANS - PRIMARY CUST C50 44,194,456 122,696 219,865 56,516 0 0 0 30 LINE TRANS - SECOND DIRECT DA368 24,739,733 0 0 0 0 1,435,233 0 31 LINE TRANS - SECOND DEMAND D60 257,875,737 274,165 569,603 28,653 0 0 0 32 LINE TRANS - SECOND CUSTOMER C60 127,806,834 355,061 636,249 163,546 0 0 0 33 LINES - SECONDARY DEMAND D30 21,637,720 33,526 69,653 3,504 0 0 0 34 LINES - SECONDARY CUSTOMER C30 10,723,958 30,778 55,153 14,177 0 0 0 35 SERVICES CW369 25,201,414 0 0 0 0 1,512 0 36 METERS CW370 81,247,077 968 169,164 78,527 21,544 53,008 272,731 37 STREET LIGHTS DA373 6,268,714 0 6,255,359 0 0 0 0 38 INSTALL ON CUST PREMISES DA371 3,397,445 0 0 0 0 0 0 39 CWINSTAL 0 0 0 0 0 0 0 40 CUSTOMER ACCOUNTING 0 41 METER READING CW902 0 0 0 0 0 0 0 42 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 43 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 44 MISC C10 0 0 0 0 0 0 0 45 0 46 CONSUMER INFORMATION 47 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 48 SALES EXPENSE C10 0 0 0 0 0 0 0 49 ADVERTISING C10 0 0 0 0 0 0 0 50 MISC C10 0 0 0 0 0 0 0 51 52 MISCELLANEOUS 53 DEMAND D99U 0 0 0 0 0 0 0 54 ENERGY E99U 0 0 0 0 0 0 0 55 CUSTOMER C10 0 0 0 0 0 0 0 56 REVENUE R02 0 0 0 0 0 0 0 57 OTHER R01 0 0 0 0 0 0 0 58 SUBSTATION CIAC CIAC (42,770,847) (10,144) (21,076) (1,060) 0 (70,288) (14,764,442) 59 0 60 TOTALS 3,912,569,823 3,597,837 10,383,484 963,563 28,287,118 24,344,597 84,286,431 Exhibit No. 40 Case No. IPC-E-23-11 P. Goralski IPC Page 2 of 6 61 IDAHO POWER COMPANY 62 3CP/12CP CLASS COST OF SERVICE STUDY 63 TWELVE MONTHS ENDING DECEMBER 31, 2023 64 *** SUMMARY OF EXPENSES EXCLUDING INCOME TAXES ***ALLOCATION TO CLASSES 65 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 66 FUNCTION ALLOCATION TOTAL RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 67 FACTOR EXPENSES RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING SEC/PRIM/TRAN SECONDARY 68 PRODUCTION (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 69 DEMAND - Base-load Summer D10BS 95,831,586 39,556,965 968,344 730,570 2,558 2,818,789 16,657,611 0 9,638,270 21,204,602 70 DEMAND - Peak D10P 24,664,054 10,180,726 249,222 188,026 658 725,468 4,287,148 0 2,480,589 5,457,402 71 DEMAND - Base-load Non-Summer D10BNS 127,178,474 55,822,434 1,551,971 1,279,583 6,494 5,097,833 30,523,522 0 18,713,154 6,052,409 72 ENERGY - POWER SUPPLY E10 492,817,416 0 0 0 0 0 0 0 0 0 73 ENERGY - Summer E10S 184,870,685 56,427,674 1,425,561 1,460,441 5,347 6,646,475 36,413,240 54,800 24,992,144 47,277,280 74 ENERGY - Non-Summer E10NS 307,946,730 127,180,821 3,754,364 3,200,359 14,966 12,803,679 74,505,086 119,005 52,196,879 10,721,459 75 76 TRANSMISSION 77 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 78 DEMAND - TRANSMISSION D13 87,631,416 37,336,474 979,555 780,726 3,453 3,061,202 18,252,106 0 10,934,639 11,508,556 79 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 80 DEMAND - DIRECT DA3509 6,018 0 0 0 0 6,018 0 0 0 0 81 82 DISTRIBUTION 83 SUBSTATIONS - GENERAL D20 29,574,028 11,242,087 537,344 244,085 3,578 882,322 5,140,863 11,336 3,526,101 7,901,136 84 SUBSTATIONS - DIRECT DA3602 1,010,940 0 0 0 0 0 0 0 256 0 85 LINES - PRIMARY DEMAND D20 63,687,687 24,209,842 1,157,171 525,637 7,706 1,900,080 11,070,853 24,412 7,593,460 17,015,101 86 LINES - PRIMARY CUSTOMER C20 31,564,512 25,951,345 700,198 1,601,978 4,611 14,755 1,989,954 0 6,007 1,010,635 87 LINES - SECONDARY DIRECT DA3647 2,702,216 0 0 0 0 722,174 0 33,466 1,579,444 0 88 LINE TRANS - PRIMARY DEMAND D50 5,393,859 2,050,388 98,003 44,517 653 160,922 937,616 2,068 643,108 1,441,049 89 LINE TRANS - PRIMARY CUST C50 2,673,272 2,197,880 59,301 135,675 391 1,250 168,534 0 509 85,593 90 LINE TRANS - SECOND DIRECT DA368 1,495,666 0 0 0 0 591,946 0 0 816,952 0 91 LINE TRANS - SECOND DEMAND D60 15,599,151 6,965,458 332,932 151,232 2,217 0 3,185,215 7,024 6,854 4,895,446 92 LINE TRANS - SECOND CUSTOMER C60 7,731,158 6,360,487 171,614 392,633 1,130 0 487,723 0 13 247,699 93 LINES - SECONDARY DEMAND D30 4,343,745 2,826,701 135,109 61,373 900 0 1,292,614 2,850 2,781 0 94 LINES - SECONDARY CUSTOMER C30 2,152,821 1,829,768 49,369 112,952 325 0 140,307 0 4 0 95 SERVICES CW369 2,903,116 2,328,427 62,712 152,951 433 8,640 219,970 0 12,421 117,389 96 METERS CW370 25,546,867 15,272,525 406,952 1,445,937 3,327 631,430 4,637,456 115 438,240 2,523,501 97 STREET LIGHTS DA373 823,719 0 0 0 0 1,734 0 0 21 0 98 INSTALL ON CUST PREMISES CWINSTAL 3,117,516 2,216,273 59,798 136,811 394 1,279 169,944 421,845 522 86,309 99 100 CUSTOMER ACCOUNTING 101 METER READING CW902 3,681,466 2,818,451 55,951 220,902 536 104,762 238,482 0 42,766 194,122 102 CUSTOMER ACCOUNTS CW903 32,460,816 26,554,621 716,476 1,639,218 4,718 129,538 2,036,213 0 52,881 1,034,129 103 UNCOLLECTIBLES CW904 5,388,730 4,833,086 2,063 205,622 0 1,916 254,688 (3) 25,816 65,542 104 MISC C10 0 0 0 0 0 0 0 0 0 0 105 106 CONSUMER INFORMATION 107 CUSTOMER ASSIST C10 19,150,720 15,744,877 424,816 971,932 2,797 9,085 1,207,320 0 3,709 613,160 108 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 109 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 110 MISC C10 0 0 0 0 0 0 0 0 0 0 111 112 MISCELLANEOUS 113 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 114 ENERGY E99U 2,119,909 771,520 17,478 19,664 53 85,562 472,327 749 339,390 265,137 115 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 116 REVENUE R02 0 0 0 0 0 0 0 0 0 0 117 OTHER INTFUND 332,773 212,346 5,770 8,754 26 2,878 16,293 26 11,394 75,286 118 RETAIL SALES REVENUE 0 0 0 0 0 0 0 0 0 0 119 120 TOTALS 1,091,583,652 480,891,174 13,922,074 15,711,579 67,274 36,409,736 214,305,086 677,692 134,058,322 139,792,943 Exhibit No. 40 Case No. IPC-E-23-11 P. Goralski IPC Page 3 of 6 61 IDAHO POWER COMPANY 62 3CP/12CP CLASS COST OF SERVICE STUDY 63 TWELVE MONTHS ENDING DECEMBER 31, 2023 64 *** SUMMARY OF EXPENSES EXCLUDING INCOME TAXES ***ALLOCATION TO CLASSES 65 (K) (L) (M) (N) (O) (P) 66 FUNCTION ALLOCATION TOTAL UNMETERED MUNICIPAL TRAFFIC SC SC SC 67 FACTOR EXPENSES GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 68 PRODUCTION (40) (41) (42) 69 DEMAND - Base-load D10BS 95,831,586 51,747 0 10,343 689,393 662,501 2,839,893 70 DEMAND - Peak D10P 24,664,054 13,318 0 2,662 177,428 170,507 730,900 71 DEMAND - Not in Use D10BNS 127,178,474 102,072 0 21,115 2,094,124 1,078,136 4,835,627 72 ENERGY - POWER SUPPLY E10 492,817,416 0 0 0 0 0 0 73 ENERGY - Summer E10S 184,870,685 147,761 237,125 29,555 1,800,130 1,710,612 6,242,542 74 ENERGY - Non-Summer E10NS 307,946,730 313,495 550,779 64,846 5,765,976 3,861,040 12,893,976 75 0 76 TRANSMISSION 77 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 78 DEMAND - TRANSMISSION D13 87,631,416 59,213 0 12,091 1,049,814 675,725 2,977,861 79 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 80 DEMAND - DIRECT DA3509 6,018 0 0 0 0 0 0 81 82 DISTRIBUTION 83 SUBSTATIONS - GENERAL D20 29,574,028 26,767 55,611 2,797 0 0 0 84 SUBSTATIONS - DIRECT DA3602 1,010,940 0 0 0 0 76,132 934,552 85 LINES - PRIMARY DEMAND D20 63,687,687 57,643 119,758 6,024 0 0 0 86 LINES - PRIMARY CUSTOMER C20 31,564,512 87,632 157,032 40,364 0 0 0 87 LINES - SECONDARY DIRECT DA3647 2,702,216 0 0 0 0 367,133 0 88 LINE TRANS - PRIMARY DEMAND D50 5,393,859 4,882 10,143 510 0 0 0 89 LINE TRANS - PRIMARY CUST C50 2,673,272 7,422 13,299 3,419 0 0 0 90 LINE TRANS - SECOND DIRECT DA368 1,495,666 0 0 0 0 86,768 0 91 LINE TRANS - SECOND DEMAND D60 15,599,151 16,585 34,456 1,733 0 0 0 92 LINE TRANS - SECOND CUSTOMER C60 7,731,158 21,478 38,487 9,893 0 0 0 93 LINES - SECONDARY DEMAND D30 4,343,745 6,730 13,983 703 0 0 0 94 LINES - SECONDARY CUSTOMER C30 2,152,821 6,179 11,072 2,846 0 0 0 95 SERVICES CW369 2,903,116 0 0 0 0 174 0 96 METERS CW370 25,546,867 304 53,191 24,692 6,774 16,668 85,756 97 STREET LIGHTS DA373 823,719 0 821,964 0 0 0 0 98 INSTALL ON CUST PREMISES CWINSTAL 3,117,516 7,484 13,411 3,447 0 0 0 99 100 CUSTOMER ACCOUNTING 101 METER READING CW902 3,681,466 0 4,387 0 369 369 369 102 CUSTOMER ACCOUNTS CW903 32,460,816 89,669 160,682 41,303 456 456 456 103 UNCOLLECTIBLES CW904 5,388,730 0 0 0 0 0 0 104 MISC C10 0 0 0 0 0 0 0 105 106 CONSUMER INFORMATION 107 CUSTOMER ASSIST C10 19,150,720 53,167 95,272 24,489 32 32 32 108 SALES EXPENSE C10 0 0 0 0 0 0 0 109 ADVERTISING C10 0 0 0 0 0 0 0 110 MISC C10 0 0 0 0 0 0 0 111 112 MISCELLANEOUS 113 DEMAND D99U 0 0 0 0 0 0 0 114 ENERGY E99U 2,119,909 1,980 3,379 405 33,289 24,885 84,090 115 CUSTOMER C10 0 0 0 0 0 0 0 116 REVENUE R02 0 0 0 0 0 0 0 117 OTHER INTFUND 332,773 0 0 0 0 0 0 118 SUBSTATION CIAC 0 0 0 0 0 0 0 0 119 0 120 TOTALS 1,091,583,652 1,075,528 2,394,029 303,240 11,617,785 8,731,137 31,626,052 Exhibit No. 40 Case No. IPC-E-23-11 P. Goralski IPC Page 4 of 6 121 IDAHO POWER COMPANY 122 3CP/12CP CLASS COST OF SERVICE STUDY 123 TWELVE MONTHS ENDING DECEMBER 31, 2023 124 *** SUMMARY OF OTHER REVENUES ***ALLOCATION TO CLASSES 125 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 126 FUNCTION ALLOCATION TOTAL OTHER RESIDENTIAL GEN SRV GEN SRV GEN SRV AREA LG POWER IRRIGATION 127 FACTOR REVENUES RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING SEC/PRIM/TRAN SECONDARY 128 PRODUCTION (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 129 DEMAND - Base-load Summer D10BS 475,261 196,176 4,802 3,623 13 13,979 82,611 0 47,799 105,161 130 DEMAND - Peak D10P 2,661 1,098 27 20 0 78 463 0 268 589 131 DEMAND - Base-load Non-Summer D10BNS 630,720 276,842 7,697 6,346 32 25,282 151,376 0 92,805 30,016 132 ENERGY - POWER SUPPLY E10 29,557,875 0 0 0 0 0 0 0 0 0 133 ENERGY - Summer E10S 11,088,051 3,384,382 85,501 87,593 321 398,638 2,183,969 3,287 1,498,962 2,835,565 134 ENERGY - Non-Summer E10NS 18,469,824 7,627,967 225,177 191,949 898 767,931 4,468,617 7,138 3,130,630 643,045 135 136 TRANSMISSION 137 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 0 0 0 138 DEMAND - TRANSMISSION D13 60,109,852 25,610,564 671,916 535,531 2,369 2,099,800 12,519,841 0 7,500,501 7,894,173 139 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 0 0 0 140 DEMAND - DIRECT DA3509 518 0 0 0 0 518 0 0 0 0 141 142 DISTRIBUTION 143 SUBSTATIONS - GENERAL D20 299,274 113,764 5,438 2,470 36 8,929 52,023 115 35,682 79,955 144 SUBSTATIONS - DIRECT DA3602 13,957 0 0 0 0 0 0 0 4 0 145 LINES - PRIMARY DEMAND D20 2,502,919 951,444 45,477 20,657 303 74,673 435,083 959 298,422 668,692 146 LINES - PRIMARY CUSTOMER C20 1,240,482 1,019,885 27,518 62,958 181 580 78,205 0 236 39,718 147 LINES - SECONDARY DIRECT DA3647 107,956 0 0 0 0 28,852 0 1,337 63,100 0 148 LINE TRANS - PRIMARY DEMAND D50 350,797 133,350 6,374 2,895 42 10,466 60,979 134 41,825 93,721 149 LINE TRANS - PRIMARY CUST C50 173,860 142,942 3,857 8,824 25 81 10,961 0 33 5,567 150 LINE TRANS - SECOND DIRECT DA368 97,220 0 0 0 0 38,477 0 0 53,103 0 151 LINE TRANS - SECOND DEMAND D60 1,014,549 453,024 21,653 9,836 144 0 207,162 457 446 318,394 152 LINE TRANS - SECOND CUSTOMER C60 502,825 413,678 11,162 25,536 73 0 31,721 0 1 16,110 153 LINES - SECONDARY DEMAND D30 156,826 102,055 4,878 2,216 32 0 46,668 103 100 0 154 LINES - SECONDARY CUSTOMER C30 77,725 66,062 1,782 4,078 12 0 5,066 0 0 0 155 SERVICES CW369 203,386 163,125 4,393 10,715 30 605 15,411 0 870 8,224 156 METERS CW370 80,239 47,969 1,278 4,541 10 1,983 14,566 0 1,376 7,926 157 STREET LIGHTS DA373 18,406 0 0 0 0 39 0 0 0 0 158 INSTALL ON CUST PREMISES DA371 13,137 0 0 0 0 10 0 13,119 8 0 159 160 CUSTOMER ACCOUNTING 161 METER READING CW902 0 0 0 0 0 0 0 0 0 0 162 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 0 0 0 163 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 0 0 0 164 MISC C10 0 0 0 0 0 0 0 0 0 0 165 166 CONSUMER INFORMATION 167 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 0 0 0 168 SALES EXPENSE C10 0 0 0 0 0 0 0 0 0 0 169 ADVERTISING C10 0 0 0 0 0 0 0 0 0 0 170 MISC C10 0 0 0 0 0 0 0 0 0 0 171 172 MISCELLANEOUS 173 DEMAND D99U 0 0 0 0 0 0 0 0 0 0 174 ENERGY E99U 0 0 0 0 0 0 0 0 0 0 175 CUSTOMER C10 0 0 0 0 0 0 0 0 0 0 176 MISC. REVENUE R02 6,150,427 5,495,771 29,596 193,701 159 1,918 195,532 11,086 40 113,760 177 FACILITIES CHARGE REVENUE DA454 9,859,316 0 0 0 0 3,309,023 0 74,734 5,557,903 0 178 RETAIL SALES REVENUE 0 179 180 TOTALS 113,640,190 46,200,098 1,158,525 1,173,490 4,682 6,781,861 20,560,253 112,468 18,324,115 12,860,615 Exhibit No. 40 Case No. IPC-E-23-11 P. Goralski IPC Page 5 of 6 121 IDAHO POWER COMPANY 122 3CP/12CP CLASS COST OF SERVICE STUDY 123 TWELVE MONTHS ENDING DECEMBER 31, 2023 124 *** SUMMARY OF OTHER REVENUES ***ALLOCATION TO CLASSES 125 (K) (L) (M) (N) (O) (P) 126 FUNCTION ALLOCATION TOTAL OTHER UNMETERED MUNICIPAL TRAFFIC SC SC SC 127 FACTOR REVENUES GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 128 PRODUCTION (40) (41) (42) 129 DEMAND - Base-load D10BS 475,261 257 0 51 3,419 3,286 14,084 130 DEMAND - Peak D10P 2,661 1 0 0 19 18 79 131 DEMAND - Not in Use D10BNS 630,720 506 0 105 10,385 5,347 23,981 132 ENERGY - POWER SUPPLY E10 29,557,875 0 0 0 0 0 0 133 ENERGY - Summer E10S 11,088,051 8,862 14,222 1,773 107,967 102,598 374,411 134 ENERGY - Non-Summer E10NS 18,469,824 18,803 33,034 3,889 345,828 231,575 773,346 135 0 136 TRANSMISSION 137 DEMAND - POWER SUPPLY D11 0 0 0 0 0 0 0 138 DEMAND - TRANSMISSION D13 60,109,852 40,617 0 8,294 720,109 463,506 2,042,632 139 DEMAND - SUBTRANSMISSION D15 0 0 0 0 0 0 0 140 DEMAND - DIRECT DA3509 518 0 0 0 0 0 0 141 0 142 DISTRIBUTION 143 SUBSTATIONS - GENERAL D20 299,274 271 563 28 0 0 0 144 SUBSTATIONS - DIRECT DA3602 13,957 0 0 0 0 1,051 12,903 145 LINES - PRIMARY DEMAND D20 2,502,919 2,265 4,706 237 0 0 0 146 LINES - PRIMARY CUSTOMER C20 1,240,482 3,444 6,171 1,586 0 0 0 147 LINES - SECONDARY DIRECT DA3647 107,956 0 0 0 0 14,667 0 148 LINE TRANS - PRIMARY DEMAND D50 350,797 318 660 33 0 0 0 149 LINE TRANS - PRIMARY CUST C50 173,860 483 865 222 0 0 0 150 LINE TRANS - SECOND DIRECT DA368 97,220 0 0 0 0 5,640 0 151 LINE TRANS - SECOND DEMAND D60 1,014,549 1,079 2,241 113 0 0 0 152 LINE TRANS - SECOND CUSTOMER C60 502,825 1,397 2,503 643 0 0 0 153 LINES - SECONDARY DEMAND D30 156,826 243 505 25 0 0 0 154 LINES - SECONDARY CUSTOMER C30 77,725 223 400 103 0 0 0 155 SERVICES CW369 203,386 0 0 0 0 12 0 156 METERS CW370 80,239 1 167 78 21 52 269 157 STREET LIGHTS DA373 18,406 0 18,367 0 0 0 0 158 INSTALL ON CUST PREMISES DA371 13,137 0 0 0 0 0 0 159 160 CUSTOMER ACCOUNTING 161 METER READING CW902 0 0 0 0 0 0 0 162 CUSTOMER ACCOUNTS CW903 0 0 0 0 0 0 0 163 UNCOLLECTIBLES CW904 0 0 0 0 0 0 0 164 MISC C10 0 0 0 0 0 0 0 165 166 CONSUMER INFORMATION 167 CUSTOMER ASSIST C10 0 0 0 0 0 0 0 168 SALES EXPENSE C10 0 0 0 0 0 0 0 169 ADVERTISING C10 0 0 0 0 0 0 0 170 MISC C10 0 0 0 0 0 0 0 171 172 MISCELLANEOUS 173 DEMAND D99U 0 0 0 0 0 0 0 174 ENERGY E99U 0 0 0 0 0 0 0 175 CUSTOMER C10 0 0 0 0 0 0 0 176 REVENUE R02 6,150,427 15,092 91,849 1,924 0 0 0 177 OTHER DA454 0 0 681 0 0 916,976 0 178 SUBSTATION CIAC 0 0 179 180 TOTALS 113,640,190 93,861 176,934 19,105 1,187,749 1,744,729 3,241,706 Exhibit No. 40 Case No. IPC-E-23-11 P. Goralski IPC Page 6 of 6 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CASE NO. IPC-E-23-11 IDAHO POWER COMPANY GORALSKI, DI TESTIMONY EXHIBIT NO. 41 1 IDAHO POWER COMPANY Pa e 1 2 3CP/12CP CLASS COST OF SERVICE STUDY 3 *** TRANSFER ADJUSTMENT**TWELVE MONTHS ENDING DECEMBER 31, 2023 4 5 A B C D E F G H I J 6 SOURCES RESIDENTIAL GEN SRV GEN SRV GEN SRV RE LG POWER IRRIGATION 7 & NOTES TOTAL RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDAR LIGHTING SEC/PRIM/TRAN SECONDAR 8 1 6 7 8 9-P/T 9-S 15 19-P/S/T 24-S 9 10 NORMALIZED SALES KWH 14,907,835,244 5,425,559,433 122,912,496 138,285,160 370,708 601,699,182 3,321,544,618 5,267,423 2,386,695,635 1,864,522,772 11 12 NORMALIZED REVENUE $1,116,166,332 501,479,142 11,567,368 16,102,622 43,713 36,446,763 230,482,910 1,261,853 125,751,566 140,327,749 13 14 ENERGY EFFICIENCY COLLECTION AT CURRENT 3.10% 34,601,156 15,545,853 358,588 499,181 1,355 1,129,850 7,144,970 39,117 3,898,299 4,350,160 15 16 EE TRANSFER ADJUSTMEN 3,474,555$ 3,474,555 1,561,073 36,008 50,126 136 113,456 717,479 3,928 391,457 436,831 17 18 PCA RATE TRANSER ADJUSTMENT PER KWH 0.011465$ 170,912,271 62,201,834 1,409,142 1,585,383 4,250 6,898,237 38,080,159 60,389 27,362,495 21,375,996 19 PCA EIM TRANSFER ADJUSTMEN 2,456,681$ 2,456,681 894,085 20,255 22,788 61 99,155 547,362 868 393,307 307,257 20 21 TOTAL BASE REVENUE TRANSFER 176,843,508 64,656,991 1,465,405 1,658,298 4,447 7,110,848 39,344,999 65,185 28,147,259 22,120,084 22 23 PROPOSED REQUIRED REVENUE 1,404,314,821 625,504,833 19,752,112 20,117,882 101,442 42,439,422 270,718,015 737,644 162,848,079 194,263,258 24 25 TARGET EE FUNDING 31,126,601$ 26 TARGET EE COLLECTION PERCENTAGE 2.22% 27 ROUNDED EE COLLECTION PERCENTAGE 2.25% 28 29 OVER/UNDER AT ROUNDED EE COLLECTION % 470,482$ Exhibit No. 41 Case No. IPC-E-23-11 P. Goralski IPC Page 1 of 2 1 IDAHO POWER COMPANY Pa e 1 2 CLASS COST OF SERVICE STUDY 3 *** TRANSFER ADJUSTMENT**TWELVE MONTHS ENDING DECEMBER 31, 2023 4 5 K L M N O P 6 SOURCES UNMETERED MUNICIPAL TRAFFIC SC SC SC 7 & NOTES TOTAL GEN SERVICE ST LIGH CONTROL DOE/INL JR SIMPLO MICRON 8 40 41 42 9 10 NORMALIZED SALES KWH 14,907,835,244 13,925,301 23,760,014 2,847,961 234,100,000 175,000,001 591,344,540 11 12 NORMALIZED REVENUE $1,116,166,332 1,144,288 3,463,322 165,609 10,547,708 7,759,368 29,622,353 13 14 ENERGY EFFICIENCY COLLECTION AT CURRENT % 34,601,156 35,473 107,363 5,134 326,979 240,540 918,293 15 16 EE TRANSFER ADJUSTMEN 3,474,555 3,562 10,781 516 32,834 24,154 92,213 17 18 PCA RATE TRANSER ADJUSTMENT PER KWH 170,912,271 159,648 272,399 32,651 2,683,861 2,006,304 6,779,525 19 PCA EIM TRANSFER ADJUSTMEN 2,456,681 2,295 3,915 469 38,578 28,838 97,448 20 21 TOTAL BASE REVENUE TRANSFER 176,843,508 165,505 287,095 33,636 2,755,273 2,059,297 6,969,186 22 23 PROPOSED REQUIRED REVENUE 1,404,314,821 1,342,227 2,825,017 433,379 14,236,899 9,789,500 39,205,110 24 25 TARGET EE FUNDING 26 TARGET EE COLLECTION PERCENTAGE 27 ROUNDED EE COLLECTION PERCENTAGE 28 29 OVER/UNDER AT ROUNDED EE COLLECTION % Exhibit No. 41 Case No. IPC-E-23-11 P. Goralski IPC Page 2 of 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CASE NO. IPC-E-23-11 IDAHO POWER COMPANY GORALSKI, DI TESTIMONY EXHIBIT NO. 42 1 IDAHO POWER COMPAN Page 1 2 3CP/12CP CLASS COST OF SERVICE STUD 3 *** REVENUE REQUIREMENT SUMMARY **TWELVE MONTHS ENDING DECEMBER 31, 2023 4 5 (A) (B) (C) (D) (E) (F) (G) (H) (I) (J) 6 SOURCES RESIDENTIAL GEN SRV GEN SRV GEN SRV RE LG POWER IRRIGATION 7 & NOTES TOTAL RESIDENTIAL On Site Gen GEN SRV On Site Gen PRIM & TRAN SECONDARY LIGHTING SEC/PRIM/TRAN SECONDARY 8 (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) 9 10 TOTAL RATE BASE 3,912,569,823 1,782,680,096 56,275,860 53,653,411 288,712 122,456,391 722,282,341 4,126,040 401,501,460 617,442,481 11 12 REVENUES FROM RATES 13 RETAIL 1,116,166,332 501,479,142 11,567,368 16,102,622 43,713 36,446,763 230,482,910 1,261,853 125,751,566 140,327,749 14 RETAIL - TRANSFER ADJUSTMENT 176,843,508 64,656,991 1,465,405 1,658,298 4,447 7,110,848 39,344,999 65,185 28,147,259 22,120,084 15 16 TOTAL SALES REVENUES 1,293,009,840 566,136,133 13,032,773 17,760,920 48,160 43,557,610 269,827,909 1,327,038 153,898,825 162,447,833 17 18 TOTAL OTHER OPERATING REVENUES 113,640,190 46,200,098 1,158,525 1,173,490 4,682 6,781,861 20,560,253 112,468 18,324,115 12,860,615 19 20 TOTAL REVENUES 1,406,650,030 612,336,231 14,191,298 18,934,410 52,842 50,339,471 290,388,162 1,439,506 172,222,939 175,308,448 21 22 OPERATING EXPENSES 23 WITHOUT INC TA 1,091,583,652 480,891,174 13,922,074 15,711,579 67,274 36,409,736 214,305,086 677,692 134,058,322 139,792,943 24 25 OPERATING INCOME 26 BEFORE INCOME TAXES 315,066,378 131,445,058 269,225 3,222,831 (14,432) 13,929,735 76,083,076 761,814 38,164,617 35,515,505 27 28 TOTAL FEDERAL INCOME TA 39,040,245 13,370,532 262,324 322,579 494 1,659,227 9,065,970 7,507 6,781,260 4,554,856 29 TOTAL STATE INCOME TA (2,828,435) (968,684) (19,005) (23,371) (36) (120,210) (656,822) (544) (491,297) (329,996) 30 31 TOTAL OPERATING EXPENSES 1,127,795,462 493,293,021 14,165,393 16,010,788 67,732 37,948,754 222,714,233 684,655 140,348,285 144,017,803 32 33 TOTAL OPERATING INCOME 278,854,568 119,043,210 25,905 2,923,623 (14,890) 12,390,717 67,673,928 754,851 31,874,654 31,290,645 34 35 ADD: IERCO OPERATING INCOME E10 1,759,534 655,548 18,494 16,641 73 69,444 396,018 621 275,592 207,076 36 CONSOLIDATED OPER INCOME 280,614,102 119,698,758 44,400 2,940,263 (14,817) 12,460,161 68,069,946 755,471 32,150,247 31,497,721 37 38 RATES OF RETURN 7.172 6.715 0.079 5.480 -5.132 10.175 9.424 18.310 8.008 5.101 39 RATES OF RETURN - INDE 1.000 0.936 0.011 0.764 -0.716 1.419 1.314 2.553 1.116 0.711 40 VERAGE MILLS/KWH 80.52 92.43 94.11 116.45 117.92 60.57 69.39 239.56 52.69 75.26 41 42 REVENUE REQUIREMENT CALCULATIO 43 RATE OF RETURN REQUIRED 7.702 7.702 7.702 7.702 7.702 7.702 7.702 7.702 7.702 7.702 5 Exhibit No. 46 ,,5,,7 ,75 ,7 ,5 ,,7,,7 ,,,,7 46 47 REQUIRED REVENUE 1,404,314,821 625,504,833 19,752,112 20,117,882 101,442 42,439,422 270,718,015 737,644 162,848,079 194,263,258 48 REVENUE DEFICIENCY 111,304,981 59,368,700 6,719,340 2,356,962 53,282 (1,118,189) 890,106 (589,394) 8,949,254 31,815,425 49 PERCENT CHANGE REQUIRED 8.61% 10.49% 51.56% 13.27% 110.64% -2.57% 0.33% -44.41% 5.82% 19.59% 50 RETURN AT CLAIMED ROR 301,346,128 137,302,021 4,334,367 4,132,386 22,237 9,431,591 55,630,186 317,788 30,923,642 47,555,420 51 EARNINGS DEFICIENCY 20,732,026 17,603,263 4,289,967 1,192,122 37,054 (3,028,570) (12,439,761) (437,684) (1,226,604) 16,057,699 52 53 REVENUE REQUIREMENT FOR RATE DESIG 54 TOTAL IDAHO SALES REVENUES 1,293,009,840 566,136,133 13,032,773 17,760,920 48,160 43,557,610 269,827,909 1,327,038 153,898,825 162,447,833 55 56 REQUESTED CHANGE IN REVENUE (%) 8.61% 10.49% 51.56% 13.27% 110.64% -2.57% 0.33% -44.41% 5.82% 19.59% 57 58 RETAIL SALES REVENUE REQUIRED 1,404,314,821 625,504,833 19,752,112 20,117,882 101,442 42,439,422 270,718,015 737,644 162,848,079 194,263,258 59 RATE OF RETURN AT REQUIRED REVENUE 7.702 7.702 7.702 7.702 7.702 7.702 7.702 7.702 7.702 7.702 60 REQUESTED AVERAGE MILLS/KWH 94.20 115.29 160.70 145.48 273.64 70.53 81.50 140.04 68.23 104.19 61 62 CTUAL RATE OF RETURN (SALES REVENUE ONLY) 4.22 4.09 -2.01 3.26 -6.78 4.58 6.52 15.57 3.37 2.98 63 REQUESTED RATE OF RETURN (SALES REVENUE ONLY) 7.07 7.42 9.93 7.65 11.68 3.67 6.65 1.28 5.60 8.14 Exhibit No. 42 Case No. IPC-E-23-11 P. Goralski IPC Page 1 of 2 1 IDAHO POWER COMPAN Page 1 2 CLASS COST OF SERVICE STUD 3 *** REVENUE REQUIREMENT SUMMARY **TWELVE MONTHS ENDING DECEMBER 31, 2023 4 5 (K) (L) (M) (N) (O) (P) 6 SOURCES UNMETERED MUNICIPAL TRAFFIC SC SC SC 7 & NOTES TOTAL GEN SERVICE ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON 8 (40) (41) (42) 9 10 TOTAL RATE BASE 3,912,569,823 3,597,837 10,383,484 963,563 28,287,118 24,344,597 84,286,431 11 12 REVENUES FROM RATES 13 RETAIL 1,116,166,332 1,144,288 3,463,322 165,609 10,547,708 7,759,368 29,622,353 14 RETAIL - TRANSFER ADJUSTMENT 176,843,508 165,505 287,095 33,636 2,755,273 2,059,297 6,969,186 15 16 TOTAL SALES REVENUES 1,293,009,840 1,309,792 3,750,417 199,244 13,302,981 9,818,665 36,591,539 17 18 TOTAL OTHER OPERATING REVENUES 113,640,190 93,861 176,934 19,105 1,187,749 1,744,729 3,241,706 19 20 TOTAL REVENUES 1,406,650,030 1,403,653 3,927,351 218,349 14,490,730 11,563,394 39,833,245 21 22 OPERATING EXPENSES 0 23 WITHOUT INC TA 1,091,583,652 1,075,528 2,394,029 303,240 11,617,785 8,731,137 31,626,052 24 0 25 OPERATING INCOME 0 26 BEFORE INCOME TAXES 315,066,378 328,125 1,533,322 (84,891) 2,872,945 2,832,256 8,207,193 27 28 TOTAL FEDERAL INCOME TA 39,040,245 36,701 53,040 6,863 692,053 509,028 1,717,811 29 TOTAL STATE INCOME TA (2,828,435) (2,659) (3,843) (497) (50,139) (36,879) (124,454) 30 31 TOTAL OPERATING EXPENSES 1,127,795,462 1,109,570 2,443,226 309,606 12,259,699 9,203,286 33,219,409 32 33 TOTAL OPERATING INCOME 278,854,568 294,083 1,484,125 (91,256) 2,231,030 2,360,107 6,613,835 34 0 35 ADD: IERCO OPERATING INCOME E10 1,759,534 1,647 2,813 337 27,014 19,893 68,324 36 CONSOLIDATED OPER INCOME 280,614,102 295,730 1,486,938 (90,919) 2,258,044 2,380,000 6,682,159 37 0 38 RATES OF RETURN 7.172 8.220 14.320 -9.436 7.983 9.776 7.928 39 RATES OF RETURN - INDE 1.000 1.146 1.997 -1.316 1.113 1.363 1.105 40 VERAGE MILLS/KWH 80.522 82.17 145.76 58.15 45.06 44.34 50.09 41 42 REVENUE REQUIREMENT CALCULATIO 43 RATE OF RETURN REQUIRED 7.702 7.702 7.702 7.702 7.702 7.702 7.702 5 ,,57,5 5 ,7 ,,7 5 ,5 ,, 46 47 REQUIRED REVENUE 1,404,314,821 1,342,227 2,825,017 433,379 14,236,899 9,789,500 39,205,110 48 REVENUE DEFICIENCY 111,304,981 32,435 (925,400) 234,134 933,918 (29,165) 2,613,571 49 PERCENT CHANGE REQUIRED 8.61% 2.48% -24.67% 117.51% 7.02% -0.30% 7.14% 50 RETURN AT CLAIMED ROR 301,346,128 277,105 799,736 74,214 2,178,674 1,875,021 6,491,741 51 EARNINGS DEFICIENCY 20,732,026 (18,625) (687,202) 165,133 (79,370) (504,979) (190,418) 52 0 53 REVENUE REQUIREMENT FOR RATE DESIG 54 TOTAL IDAHO SALES REVENUES 1,293,009,840 1,309,792 3,750,417 199,244 13,302,981 9,818,665 36,591,539 55 56 REQUESTED CHANGE IN REVENUE (%) 8.61% 2.48% -24.67% 117.51% 7.02% -0.30% 7.14% 57 58 RETAIL SALES REVENUE REQUIRED 1,404,314,821 1,342,227 2,825,017 433,379 14,236,899 9,789,500 39,205,110 59 RATE OF RETURN AT REQUIRED REVENUE 7.702 7.702 7.702 7.702 7.702 7.702 7.702 60 REQUESTED AVERAGE MILLS/KWH 94.20 96.39 118.90 152.17 60.82 55.94 66.30 61 62 CTUAL RATE OF RETURN (SALES REVENUE ONLY) 4.22 5.57 12.59 -11.45 3.69 2.53 4.00 63 REQUESTED RATE OF RETURN (SALES REVENUE ONLY) 7.07 6.47 3.68 12.85 6.99 2.41 7.10 Exhibit No. 42 Case No. IPC-E-23-11 P. Goralski IPC Page 2 of 2 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CASE NO. IPC-E-23-11 IDAHO POWER COMPANY GORALSKI, DI TESTIMONY EXHIBIT NO. 43 1 IDAHO 2 3CP/12CP 3 * RE IDENTIAL ERVI E - HEDULE 1 TWELVE , 4 UNIT 5 (A)(B)(C)(D)(E)(F)(G)(H)(I)(J) 6 FUN TI N RETURN PERATIN REVENUE REVENUE REVENUE BILLIN UNIT T UMMER N N-UMMER ERVI E. 8 PR DU TI N 9 DEMAND - Base-load ummer 14,613,504 41,071,053 2,149,106 14,790,945 73,173,355 1,762,822,293 0.04151 0.041509 10 DEMAND - Peak 3,497,970 10,543,147 514,422 14,732,749 1,762,822,293 0.00836 0.00836 11 DEMAND - Base-load Non-umme 20,622,446 57,959,101 3,032,800 20,872,849 103,261,582 3,662,737,141 0.02819 0.02819 12 ENER Y - P WER UPPL 0 0 0 0 5,425,559,433 0.00000 13 ENER Y - ummer 412,013 56,470,362 60,592 53,378,121 1,762,822,293 0.03028 0.03028 14 ENER Y - Non-ummer 928,625 127,277,035 136,566 120,307,516 3,662,737,141 0.03285 0.03285 15 ENER Y - ANNUAL 0 0.0538 16 TRAN MI I N 0 17 DEMAND - P WER UPPL 0 0 0 0 0 0.00000 18 DEMAND - TRAN MI I N 26,793,962 40,112,565 3,940,402 46,602,187 5,425,559,433 0.00859 0.00859 0.00859 19 DEMAND - UBTRAN MI I N 0 0 0 0 0 0.00000 20 DEMAND - DIRE T 0 0 0 0 0 0.00000 21 22 DI TRIBUTI N 0 23 UB TATI N - ENERAL 9,217,585 12,197,110 1,355,566 23,126,364 5,425,559,433 0.00426 0.00426 0.00426 24 UB TATI N - DIRE T 0 0 0 0 0 0.00000 25 LINE - PRIMARY DEMAND 8,792,358 25,120,808 1,293,031 34,702,943 5,425,559,433 0.00640 0.00640 0.00640 26 LINE - PRIMARY U T MER 9,424,825 26,927,840 1,386,043 37,199,254 5,909,767 6.29454 6.29454 27 LINE - E NDARY DIRE T 0 0 0 0 0 0.00000 28 LINE TRAN - PRIMARY DEMAN 2,276,024 2,286,204 334,719 4,879,618 5,425,559,433 0.00090 0.00090 0.00090 29 LINE TRAN - PRIMARY U T 2,439,747 2,450,659 358,797 5,230,627 5,909,767 0.88508 0.88508 30 LINE TRAN - E ND DIRE T 0 0 0 0 0 0.00000 31 LINE TRAN - E ND DEMAND 7,731,707 7,766,531 1,137,048 16,576,386 5,425,559,433 0.00306 0.00306 0.00306 32 LINE TRAN - E ND U T M 7,060,186 7,091,985 1,038,292 15,136,678 5,909,767 2.56130 2.56130 33 LINE - E NDARY DEMAND 945,460 2,924,659 139,042 3,955,301 5,425,559,433 0.00073 0.00073 0.00073 34 LINE - E NDARY U T ME 612,011 1,893,177 90,004 2,560,328 5,909,767 0.43324 0.43324 35 ERVI E 1,357,186 2,469,043 199,592 3,931,879 5,909,767 0.66532 0.66532 36 METER 3,261,348 15,610,429 479,624 19,469,679 5,909,767 3.29449 3.29449 37 TREET LI HT 0 0 0 0 0 0.00000 38 IN TALL N U T PREMI E 0 2,216,273 0 2,216,273 5,909,767 0.37502 0.37502 39 40 U T MER A UNTIN 0 41 METER READIN 0 2,818,451 0 2,818,451 5,909,767 0.47691 0.47691 42 U T MER A UNT 0 26,554,621 0 26,554,621 5,909,767 4.49335 4.49335 43 UN LLE TIBLE 0 4,833,086 0 4,833,086 5,909,767 0.81781 0.81781 44 MI 0 0 0 0 5,909,767 0.00000 45 46 N UMER INF RMATI N 0 47 U T MER A I T 0 15,744,877 0 15,744,877 5,909,767 2.66421 2.66421 48 ALE EXPEN E 0 0 0 0 5,909,767 0.00000 49 ADVERTI IN 0 0 0 0 5,909,767 0.00000 50 MI 0 0 0 0 5,909,767 0.00000 51 52 MI ELLANE U 0 53 DEMAND 0 0 0 0 0 0.00000 54 ENER 0 771,520 0 771,520 5,425,559,433 0.00014 0.000142 0.000142 55 U T MER 0 0 0 0 5,909,767 0.00000 56 REVENUE 0 0 0 5,495,771 5,909,767 0.92995 0.9299 57 THER 0 212,346 0 212,346 5,909,767 0.03593 0.0359 58 UB TATI N IA 288,200 29,860 42,384 375,135 5,909,767 0.06348 0.0635 59 60 T TAL 119,698,758 493,293,021 17,603,263 35,663,794 625,504,833 0.104220 0.085113 22.00378 Exhibit No. 43 Case No. IPC-E-23-11 P. Goralski IPC Page 1 of 8 61 IDAHO 62 3CP/12CP 63 * RE IDENTIAL ERVI E N ITE ENERATI N - HEDULE 6 TWELVE , 64 UNIT 65 (A)(B)(C)(D)(E)(F)(G)(H)(I)(J) 66 FUN TI N RETURN PERATIN REVENUE REVENUE REVENUE BILLIN UNIT T UMMER N N-UMMER ERVI E. 68 PR DU TI N 69 DEMAND - Base-load ummer 4,203 991,380 406,141 362,079 1,899,777 35,810,327 0.05305 0.053051 70 DEMAND - Peak 1,006 254,735 97,216 386,628 35,810,327 0.01080 0.01080 71 DEMAND - Base-load Non-umme 6,737 1,588,890 650,925 580,305 3,044,784 87,102,169 0.03496 0.03496 72 ENER Y - P WER UPPL 0 0 0 0 122,912,496 0.00000 73 ENER Y - ummer 122 1,426,231 11,817 1,351,676 35,810,327 0.03775 0.03775 74 ENER Y - Non-ummer 322 3,756,129 31,122 3,559,780 87,102,169 0.04087 0.04087 75 ENER Y - ANNUAL 0 0.0679 76 TRAN MI I N 0 77 DEMAND - P WER UPPL 0 0 0 0 0 0.00000 78 DEMAND - TRAN MI I N 8,260 1,024,821 798,083 1,435,880 122,912,496 0.01168 0.01168 0.01168 79 DEMAND - UBTRAN MI I N 0 0 0 0 0 0.00000 80 DEMAND - DIRE T 0 0 0 0 0 0.00000 81 82 DI TRIBUTI N 83 UB TATI N - ENERAL 5,177 565,714 500,194 1,239,024 122,912,496 0.01008 0.01008 0.01008 84 UB TATI N - DIRE T 0 0 0 0 0 0.00000 85 LINE - PRIMARY DEMAND 4,938 1,184,232 477,119 1,786,191 122,912,496 0.01453 0.01453 0.01453 86 LINE - PRIMARY U T MER 2,988 716,573 288,702 1,080,816 159,453 6.77829 6.77829 87 LINE - E NDARY DIRE T 0 0 0 0 0 0.00000 88 LINE TRAN - PRIMARY DEMAN 1,278 105,009 123,509 266,233 122,912,496 0.00217 0.00217 0.00217 89 LINE TRAN - PRIMARY U T 773 63,540 74,735 161,096 159,453 1.01031 1.01031 90 LINE TRAN - E ND DIRE T 0 0 0 0 0 0.00000 91 LINE TRAN - E ND DEMAND 4,342 356,729 419,562 904,408 122,912,496 0.00736 0.00736 0.00736 92 LINE TRAN - E ND U T M 2,238 183,880 216,268 466,188 159,453 2.92368 2.92368 93 LINE - E NDARY DEMAND 531 138,019 51,306 202,761 122,912,496 0.00165 0.00165 0.00165 94 LINE - E NDARY U T ME 194 50,433 18,747 74,090 159,453 0.46465 0.46465 95 ERVI E 430 65,066 41,500 116,986 159,453 0.73367 0.73367 96 METER 1,021 412,547 98,661 545,149 159,453 3.41888 3.41888 97 TREET LI HT 0 0 0 0 0 0.00000 98 IN TALL N U T PREMI E 0 59,798 0 59,798 159,453 0.37502 0.37502 99 100 U T MER A UNTIN 101 METER READIN 0 55,951 0 55,951 159,453 0.35089 0.35089 102 U T MER A UNT 0 716,476 0 716,476 159,453 4.49335 4.49335 103 UN LLE TIBLE 0 2,063 0 2,063 159,453 0.01294 0.01294 104 MI 0 0 0 0 159,453 0.00000 105 106 N UMER INF RMATI N 107 U T MER A I T 0 424,816 0 424,816 159,453 2.66421 2.66421 108 ALE EXPEN E 0 0 0 0 159,453 0.00000 109 ADVERTI IN 0 0 0 0 159,453 0.00000 110 MI 0 0 0 0 159,453 0.00000 111 112 MI ELLANE U 0 113 DEMAND 0 0 0 0 0 0.00000 114 ENER 0 17,478 0 17,478 122,912,496 0.00014 0.000142 0.000142 115 U T MER 0 0 0 0 159,453 0.00000 116 REVENUE 0 0 0 29,596 159,453 0.18561 0.1856 117 THER 0 5,770 0 5,770 159,453 0.03618 0.0362 118 UB TATI N IA 162 887 15,639 22,109 159,453 0.13866 0.1387 119 120 T TAL 44,400 14,165,393 4,289,967 942,384 19,752,112 0.149204 0.123436 22.93780 Exhibit No. 43 Case No. IPC-E-23-11 P. Goralski IPC Page 2 of 8 121 IDAHO 122 3CP/12CP 123 * MALL ENERAL ERVI E - HEDULE 7 TWELVE , 124 UNIT 125 (A)(B)(C)(D)(E)(F)(G)(H)(I)(J) 126 FUN TI N RETURN PERATIN REVENUE REVENUE REVENUE BILLIN UNIT T UMMER N N-UMMER ERVI E. 128 PR DU TI N 129 DEMAND - Base-load ummer 220,275 752,986 89,310 273,171 1,363,076 45,603,878 0.02989 0.029889 130 DEMAND - Peak 52,726 193,391 21,378 274,885 45,603,878 0.00603 0.006028 131 DEMAND - Base-load Non-umme 385,809 1,318,844 156,425 478,455 2,387,408 92,681,282 0.02576 0.025759 132 ENER Y - P WER UPPL 0 0 0 0 138,285,160 0.00000 133 ENER Y - ummer 8,703 1,461,327 3,529 1,381,974 45,603,878 0.03030 0.030304 134 ENER Y - Non-ummer 19,072 3,202,300 7,733 3,028,409 92,681,282 0.03268 0.032676 135 ENER Y - ANNUAL 0 0.05115 136 TRAN MI I N 0 137 DEMAND - P WER UPPL 0 0 0 0 0 0.00000 138 DEMAND - TRAN MI I N 457,273 827,259 185,400 998,664 138,285,160 0.00722 0.007222 0.007222 139 DEMAND - UBTRAN MI I N 0 0 0 0 0 0.00000 140 DEMAND - DIRE T 0 0 0 0 0 0.00000 141 142 DI TRIBUTI N 0 143 UB TATI N - ENERAL 163,337 260,707 66,224 510,752 138,285,160 0.00369 0.00369 0.00369 144 UB TATI N - DIRE T 0 0 0 0 0 0.00000 145 LINE - PRIMARY DEMAND 155,802 541,492 63,169 761,701 138,285,160 0.00551 0.00551 0.00551 146 LINE - PRIMARY U T MER 474,835 1,650,298 192,521 2,321,428 364,810 6.36338 6.363385 147 LINE - E NDARY DIRE T 0 0 0 0 0 0.00000 148 LINE TRAN - PRIMARY DEMAN 40,331 48,622 16,352 108,078 138,285,160 0.00078 0.00078 0.00078 149 LINE TRAN - PRIMARY U T 122,918 148,184 49,837 329,388 364,810 0.90290 0.902904 150 LINE TRAN - E ND DIRE T 0 0 0 0 0 0.00000 151 LINE TRAN - E ND DEMAND 137,007 165,174 55,549 367,149 138,285,160 0.00266 0.00266 0.00266 152 LINE TRAN - E ND U T M 355,701 428,830 144,218 953,202 364,810 2.61287 2.612872 153 LINE - E NDARY DEMAND 16,754 63,077 6,793 86,763 138,285,160 0.00063 0.00063 0.00063 154 LINE - E NDARY U T ME 30,834 116,089 12,502 159,680 364,810 0.43771 0.437707 155 ERVI E 72,762 160,355 29,501 262,128 364,810 0.71853 0.71853 156 METER 252,005 1,471,582 102,175 1,856,636 364,810 5.08932 5.08932 157 TREET LI HT 0 0 0 0 0 0.00000 158 IN TALL N U T PREMI E 0 136,811 0 136,811 364,810 0.37502 0.37502 159 0 160 U T MER A UNTIN 0 161 METER READIN 0 220,902 0 220,902 364,810 0.60553 0.60553 162 U T MER A UNT 0 1,639,218 0 1,639,218 364,810 4.49335 4.49335 163 UN LLE TIBLE 0 205,622 0 205,622 364,810 0.56364 0.56364 164 MI 0 0 0 0 364,810 0.00000 165 166 N UMER INF RMATI N 0 167 U T MER A I T 0 971,932 0 971,932 364,810 2.66421 2.66421 168 ALE EXPEN E 0 0 0 0 364,810 0.00000 169 ADVERTI IN 0 0 0 0 364,810 0.00000 170 MI 0 0 0 0 364,810 0.00000 171 172 MI ELLANE U 0 173 DEMAND 0 0 0 0 0 0.00000 174 ENER 0 19,664 0 19,664 138,285,160 0.00014 0.000142 0.000142 175 U T MER 0 0 0 0 364,810 0.00000 176 REVENUE 0 0 0 193,701 364,810 0.53096 0.5310 177 THER 0 8,754 0 8,754 364,810 0.02400 0.02400 178 UB TATI N IA 25,879 2,634 10,493 42,642 364,810 0.11689 0.11689 179 180 T TAL 2,940,263 16,010,788 1,192,122 751,627 20,117,882 0.086851 0.079064 24.202608 Exhibit No. 43 Case No. IPC-E-23-11 P. Goralski IPC Page 3 of 8 181 IDAHO 182 3CP/12CP 183 * MALL ENERAL ERVI E N ITE ENERATI N - HEDULE 8 TWELVE , 184 UNIT 185 (A)(B)(C)(D)(E)(F)(G)(H)(I)(J) 186 FUN TI N RETURN PERATIN REVENUE REVENUE REVENUE BILLIN UNIT T UMMER N N-UMMER ERVI E-. 188 PR DU TI N 189 DEMAND - Base-load ummer 722 2,581 1,807 957 5,235 110,080 0.04756 0.047557 190 DEMAND - Peak 173 664 432 1,073 110,080 0.00975 0.009749 191 DEMAND - Base-load Non-umme 1,834 6,551 4,586 2,428 13,288 260,628 0.05099 0.050986 192 ENER Y - P WER UPPL 0 0 0 0 370,708 0.00000 193 ENER Y - ummer 30 5,348 75 5,079 110,080 0.04614 0.046139 194 ENER Y - Non-ummer 84 14,969 209 14,216 260,628 0.05454 0.054544 195 ENER Y - ANNUAL 0 0.09079 196 TRAN MI I N 0 197 DEMAND - P WER UPPL 0 0 0 0 0 0.00000 198 DEMAND - TRAN MI I N 1,894 3,512 4,737 5,628 370,708 0.01518 0.015181 0.015181 199 DEMAND - UBTRAN MI I N 0 0 0 0 0 0.00000 200 DEMAND - DIRE T 0 0 0 0 0 0.00000 201 0 202 DI TRIBUTI N 0 203 UB TATI N - ENERAL 2,243 3,648 5,608 8,921 370,708 0.02406 0.02406 0.02406 204 UB TATI N - DIRE T 0 0 0 0 0 0.00000 205 LINE - PRIMARY DEMAND 2,139 7,772 5,349 12,534 370,708 0.03381 0.03381 0.03381 206 LINE - PRIMARY U T MER 1,280 4,650 3,201 7,499 1,050 7.14228 7.142275 207 LINE - E NDARY DIRE T 0 0 0 0 0 0.00000 208 LINE TRAN - PRIMARY DEMAN 554 670 1,385 1,938 370,708 0.00523 0.00523 0.00523 209 LINE TRAN - PRIMARY U T 331 401 829 1,160 1,050 1.10453 1.104530 210 LINE TRAN - E ND DIRE T 0 0 0 0 0 0.00000 211 LINE TRAN - E ND DEMAND 1,881 2,275 4,704 6,585 370,708 0.01776 0.01776 0.01776 212 LINE TRAN - E ND U T M 959 1,160 2,398 3,356 1,050 3.19634 3.196343 213 LINE - E NDARY DEMAND 230 907 575 1,419 370,708 0.00383 0.00383 0.00383 214 LINE - E NDARY U T ME 83 328 208 513 1,050 0.48829 0.488285 215 ERVI E 193 439 483 866 1,050 0.82487 0.82487 216 METER 543 3,344 1,358 4,620 1,050 4.39954 4.39954 217 TREET LI HT 0 0 0 0 0 0.00000 218 IN TALL N U T PREMI E 0 394 0 394 1,050 0.37502 0.37502 219 220 U T MER A UNTIN 0 221 METER READIN 0 536 0 536 1,050 0.51071 0.51071 222 U T MER A UNT 0 4,718 0 4,718 1,050 4.49335 4.49335 223 UN LLE TIBLE 0 0 0 0 1,050 0.00000 0.00000 224 MI 0 0 0 0 1,050 0.00000 225 226 N UMER INF RMATI N 0 227 U T MER A I T 0 2,797 0 2,797 1,050 2.66421 2.66421 228 ALE EXPEN E 0 0 0 0 1,050 0.00000 229 ADVERTI IN 0 0 0 0 1,050 0.00000 230 MI 0 0 0 0 1,050 0.00000 231 232 MI ELLANE U 0 233 DEMAND 0 0 0 0 0 0.00000 234 ENER 0 53 0 53 370,708 0.00014 0.000142 0.000142 235 U T MER 0 0 0 0 1,050 0.00000 236 REVENUE 0 0 0 159 1,050 0.15148 0.1515 237 THER 0 26 0 26 1,050 0.02516 0.02516 238 UB TATI N IA 355 11 889 852 1,050 0.81161 0.81161 239 240 T TAL 14,817 67,732 37,054 3,385 101,442.212 0.203461 0.205546 24.261194 Exhibit No. 43 Case No. IPC-E-23-11 P. Goralski IPC Page 4 of 8 301 IDAHO 302 3CP/12CP 303 * LAR E ENERAL ERVI E - HEDULE 9 E NDARY TWELVE , 304 UNIT 305 (A)(B)(C)(D)(E)(F)(G)(H)(I)(J)(K)(L)(M) 306 FUN TI N RETURN PERATIN REVENUE REVENUE REVENUE BILLIN UNIT T UMMER N N-UMMER UMMER N N-UMMER ERVI E BA I. 308 PR DU TI N 309 DEMAND - Base-load ummer 8,637,266 17,724,632 1,578,458 6,228,532 30,382,237 3,897,816 7.79468 7.79468 310 DEMAND - Peak 2,067,464 4,542,556 377,828 6,100,767 3,897,816 1.56518 1.56518 311 DEMAND - Base-load Non-umme 15,826,986 32,478,738 2,892,377 11,413,204 55,672,620 7,244,505 7.68481 7.68481 312 ENER Y - P WER UPPL 0 0 0 0 3,321,544,618 0.00000 313 ENER Y - ummer 373,173 36,459,341 68,197 34,426,701 1,143,297,617 0.03011 0.030112 314 ENER Y - Non-ummer 763,549 74,599,413 139,538 70,440,430 2,178,247,001 0.03234 0.032338 315 ENER Y - ANNUAL 0 0.03157 316 TRAN MI I N 0 317 DEMAND - P WER UPPL 0 0 0 0 0 0.00000 318 DEMAND - TRAN MI I N 18,384,372 20,523,253 3,359,738 21,863,494 11,142,321 1.96220 1.96220 1.96220 319 DEMAND - UBTRAN MI I N 0 0 0 0 0 0.00000 320 DEMAND - DIRE T 0 0 0 0 0 0.00000 321 322 DI TRIBUTI N 0 323 UB TATI N - ENERAL 5,916,140 5,871,725 1,081,173 10,279,913 15,010,667 0.68484 0.68484 324 UB TATI N - DIRE T 0 0 0 0 0 0.00000 325 LINE - PRIMARY DEMAND 5,643,216 11,767,998 1,031,296 15,587,367 15,010,667 1.03842 1.03842 326 LINE - PRIMARY U T MER 1,014,352 2,115,264 185,372 2,801,784 453,162 6.18274 6.18274 327 LINE - E NDARY DIRE T 0 0 0 0 0 0.00000 328 LINE TRAN - PRIMARY DEMAN 1,460,825 1,118,082 266,965 2,158,427 15,010,667 0.14379 0.14379 329 LINE TRAN - PRIMARY U T 262,579 200,972 47,986 387,971 453,162 0.85614 0.85614 330 LINE TRAN - E ND DIRE T 0 0 0 0 0 0.00000 331 LINE TRAN - E ND DEMAND 4,962,457 3,798,262 906,887 7,332,323 15,010,667 0.48847 0.48847 332 LINE TRAN - E ND U T M 759,856 581,594 138,863 1,122,733 453,162 2.47755 2.47755 333 LINE - E NDARY DEMAND 606,827 1,367,580 110,897 1,778,401 15,010,667 0.11848 0.11848 334 LINE - E NDARY U T ME 65,868 148,444 12,037 193,037 453,162 0.42598 0.42598 335 ERVI E 179,958 242,201 32,887 362,462 453,162 0.79985 0.79985 336 METER 1,389,947 4,809,166 254,012 5,842,489 453,162 12.89272 12.89272 337 TREET LI HT 0 0 0 0 0 0.00000 0.00000 338 IN TALL N U T PREMI E 0 169,944 0 169,944 453,162 0.37502 0.37502 339 340 U T MER A UNTIN 0 341 METER READIN 0 238,482 0 238,482 453,162 0.52626 0.52626 342 U T MER A UNT 0 2,036,213 0 2,036,213 453,162 4.49335 4.49335 343 UN LLE TIBLE 0 254,688 0 254,688 453,162 0.56202 0.56202 344 MI 0 0 0 0 453,162 0.00000 345 346 N UMER INF RMATI N 0 347 U T MER A I T 0 1,207,320 0 1,207,320 453,162 2.66421 2.66421 348 ALE EXPEN E 0 0 0 0 453,162 0.00000 349 ADVERTI IN 0 0 0 0 453,162 0.00000 350 MI 0 0 0 0 453,162 0.00000 351 352 MI ELLANE U 0 353 DEMAND 0 0 0 0 0 0.00000 354 ENER 0 472,327 0 472,327 3,321,544,618 0.00014 0.000142 0.000142 355 U T MER 0 0 0 0 453,162 0.00000 356 REVENUE 0 0 0 195,532 453,162 0.43148 0.43148 357 THER 0 16,293 0 16,293 15,010,667 0.00109 0.00109 358 UB TATI N IA 244,889 30,253 44,753 214,876 15,010,667 0.01431 0.01431 359 360 T TAL 68,069,946 222,714,233 12,439,761 17,641,736 270,718,015 11.32206 9.64701 0.030254 0.032480 31.8254 2.45969 Exhibit No. 43 Case No. IPC-E-23-11 P. Goralski IPC Page 5 of 8 361 IDAHO 362 3CP/12CP 363 * LAR E ENERAL ERVI E - HEDULE 9 PRIM. TRAN. TWELVE , 364 UNIT 365 (A)(B)(C)(D)(E)(F)(G)(H)(I)(J)(K)(L)(M) 366 FUN TI N RETURN PERATIN REVENUE REVENUE REVENUE BILLIN UNIT T UMMER N N-UMMER UMMER N N-UMMER ERVI E BA I. 368 PR DU TI N 369 DEMAND - Base-load ummer 1,578,047 3,013,701 383,560 1,053,987 5,115,246 566,997 9.02164 9.02164 370 DEMAND - Peak 377,730 772,123 91,811 1,026,140 566,997 1.80978 1.80978 371 DEMAND - Base-load Non-umme 2,853,928 5,450,336 693,676 1,906,156 9,251,020 998,364 9.26618 9.26618 372 ENER Y - P WER UPPL 0 0 0 0 601,699,182 0.00000 373 ENER Y - ummer 73,542 6,655,558 17,875 6,282,661 216,006,603 0.02909 0.029086 374 ENER Y - Non-ummer 141,671 12,821,177 34,434 12,102,833 385,692,579 0.03138 0.031379 375 ENER Y - ANNUAL 0 0.03056 376 TRAN MI I N 0 377 DEMAND - P WER UPPL 0 0 0 0 0 0.00000 378 DEMAND - TRAN MI I N 3,329,060 3,472,391 809,162 3,612,018 1,565,362 2.30747 2.30747 2.30747 379 DEMAND - UBTRAN MI I N 0 0 0 0 0 0.00000 380 DEMAND - DIRE T 5,924 6,750 1,440 10,217 1,565,362 0.00653 0.00653 0.00653 381 382 DI TRIBUTI N 0 383 UB TATI N - ENERAL 1,096,284 1,017,729 266,463 1,746,260 1,952,328 0.89445 0.89445 384 UB TATI N - DIRE T 0 0 0 0 0 0.00000 385 LINE - PRIMARY DEMAND 1,045,710 2,029,241 254,171 2,658,007 1,952,328 1.36146 1.36146 386 LINE - PRIMARY U T MER 8,120 15,758 1,974 20,640 3,410 6.05301 6.05301 387 LINE - E NDARY DIRE T 622,116 799,015 151,212 1,188,654 1,952,328 0.60884 0.60884 388 LINE TRAN - PRIMARY DEMAN 270,697 194,357 65,796 365,986 1,952,328 0.18746 0.18746 389 LINE TRAN - PRIMARY U T 2,102 1,509 511 2,842 3,410 0.83345 0.83345 390 LINE TRAN - E ND DIRE T 996,288 715,003 242,158 1,346,719 1,952,328 0.68980 0.68980 391 LINE TRAN - E ND DEMAND 0 0 0 0 1,952,328 0.00000 392 LINE TRAN - E ND U T M 0 0 0 0 3,410 0.00000 393 LINE - E NDARY DEMAND 0 0 0 0 1,952,328 0.00000 394 LINE - E NDARY U T ME 0 0 0 0 3,410 0.00000 395 ERVI E 7,631 9,582 1,855 14,110 3,410 4.13810 4.13810 396 METER 204,332 656,668 49,665 792,137 3,410 232.30506 232.30506 397 TREET LI HT 1,342 1,899 326 2,764 3,410 0.81050 0.81050 398 IN TALL N U T PREMI E 276 1,313 67 1,488 3,410 0.43633 0.43633 399 400 U T MER A UNTIN 0 401 METER READIN 0 104,762 0 104,762 3,410 30.72304 30.72304 402 U T MER A UNT 0 129,538 0 129,538 3,410 37.98894 37.98894 403 UN LLE TIBLE 0 1,916 0 1,916 3,410 0.56202 404 MI 0 0 0 0 3,410 0.00000 405 406 N UMER INF RMATI N 0 407 U T MER A I T 0 9,085 0 9,085 3,410 2.66421 2.66421 408 ALE EXPEN E 0 0 0 0 3,410 0.00000 409 ADVERTI IN 0 0 0 0 3,410 0.00000 410 MI 0 0 0 0 3,410 0.00000 411 412 MI ELLANE U 0 413 DEMAND 0 0 0 0 0 0.00000 414 ENER 0 85,562 0 85,562 601,699,182 0.00014 0.000142 0.000142 415 U T MER 0 0 0 0 3,410 0.00000 416 REVENUE 0 0 0 1,918 3,410 0.56240 0.56240 417 THER 0 2,878 0 3,306,145 1,952,328 1.69344 1.69344 418 UB TATI N IA 154,638 19,100 37,586 123,124 1,952,328 0.06307 0.06307 419 420 T TAL 12,460,161 37,948,754 3,028,570 2,960,144 42,439,422 13.14541 11.58017 0.029228 0.031522 315.39024 1.98551 Exhibit No. 43 Case No. IPC-E-23-11 P. Goralski IPC Page 6 of 8 541 IDAHO 542 3CP/12CP 543 * LAR E P WER - HEDULE 19 P T TWELVE , 544 UNIT 545 (A)(B)(C)(D)(E)(F)(G)(H)(I)(J)(K)(L)(M) 546 FUN TI N RETURN PERATIN REVENUE REVENUE REVENUE BILLIN UNIT T UMMER N N-UMMER UMMER N N-UMMER ERVI E BA I. 548 PR DU TI N 549 DEMAND - Base-load ummer 4,246,307 10,469,029 162,006 3,603,894 18,053,270 1,625,074 11.10920 11.10920 550 DEMAND - Peak 1,016,420 2,679,444 38,779 3,643,376 1,625,074 2.24198 2.24198 551 DEMAND - Base-load Non-umme 8,244,405 20,326,112 314,543 6,997,130 35,051,273 3,081,027 11.37649 11.37649 552 ENER Y - P WER UPPL 0 0 0 0 2,386,695,635 0.00000 553 ENER Y - ummer 217,622 25,034,721 8,303 23,652,969 815,019,158 0.02902 0.029021 554 ENER Y - Non-ummer 454,511 52,285,801 17,341 49,399,969 1,571,676,477 0.03143 0.031431 555 ENER Y - ANNUAL 0 0.03061 556 TRAN MI I N 0 557 DEMAND - P WER UPPL 0 0 0 0 0 0.00000 558 DEMAND - TRAN MI I N 9,358,129 12,765,489 357,034 14,142,328 4,706,101 3.00511 3.00511 3.00511 559 DEMAND - UBTRAN MI I N 0 0 0 0 0 0.00000 560 DEMAND - DIRE T 0 0 0 0 0 0.00000 561 562 DI TRIBUTI N 0 563 UB TATI N - ENERAL 3,447,830 4,200,644 131,542 7,435,654 5,315,392 1.39889 1.39889 564 UB TATI N - DIRE T 414 337 16 726 5,315,392 0.00014 0.00014 565 LINE - PRIMARY DEMAND 3,288,774 8,236,885 125,474 11,058,271 5,315,392 2.08042 2.08042 566 LINE - PRIMARY U T MER 2,602 6,516 99 8,748 1,392 6.28469 6.28469 567 LINE - E NDARY DIRE T 1,070,751 1,788,929 40,852 2,741,568 5,315,392 0.51578 0.51578 568 LINE TRAN - PRIMARY DEMAN 851,345 809,667 32,481 1,575,448 5,315,392 0.29639 0.29639 569 LINE TRAN - PRIMARY U T 674 641 26 1,246 1,392 0.89537 0.89537 570 LINE TRAN - E ND DIRE T 1,082,066 1,028,650 41,283 2,002,021 5,315,392 0.37665 0.37665 571 LINE TRAN - E ND DEMAND 9,073 8,629 346 16,790 5,315,392 0.00316 0.00316 572 LINE TRAN - E ND U T M 17 16 1 32 1,392 0.02273 0.02273 573 LINE - E NDARY DEMAND 1,109 2,998 42 3,951 5,315,392 0.00074 0.00074 574 LINE - E NDARY U T ME 1 4 0 5 1,392 0.00379 0.00379 575 ERVI E 8,634 14,110 329 21,430 1,392 15.39492 15.39492 576 METER 111,604 460,074 4,258 564,568 1,392 405.58024 405.58024 577 TREET LI HT 13 24 0 36 1,392 0.02557 0.02557 578 IN TALL N U T PREMI E 156 552 6 692 1,392 0.49747 0.49747 579 580 U T MER A UNTIN 0 581 METER READIN 0 42,766 0 42,766 1,392 30.72304 30.72304 582 U T MER A UNT 0 52,881 0 52,881 1,392 37.98894 37.98894 583 UN LLE TIBLE 0 25,816 0 25,816 1,392 18.54586 18.54586 584 MI 0 0 0 0 1,392 0.00000 585 586 N UMER INF RMATI N 0 587 U T MER A I T 0 3,709 0 3,709 1,392 2.66421 2.66421 588 ALE EXPEN E 0 0 0 0 1,392 0.00000 589 ADVERTI IN 0 0 0 0 1,392 0.00000 590 MI 0 0 0 0 1,392 0.00000 591 592 MI ELLANE U 0 593 DEMAND 0 0 0 0 0 0.00000 594 ENER 0 339,390 0 339,390 2,386,695,635 0.00014 0.00014 0.00014 595 U T MER 0 0 0 0 1,392 0.00000 596 REVENUE 0 0 0 40 1,392 0.02846 0.02846 597 THER 0 11,394 0 5,546,509 5,315,392 1.04348 1.04348 598 UB TATI N IA 1,262,211 246,943 48,156 1,444,306 5,315,392 0.27172 0.27172 599 600 T TAL 32,150,247 140,348,285 1,226,604 10,601,024 162,848,079 16.35628 14.38160 0.02916 0.03157 518.59836 3.35697 Exhibit No. 43 Case No. IPC-E-23-11 P. Goralski IPC Page 7 of 8 661 IDAHO 662 3CP/12CP 663 * IRRI ATI N - HEDULE 24 E NDARY TWELVE , 664 Production-related revenue and billing units are or June - eptember UNIT 665 (A)(B)(C)(D)(E)(F)(G)(H)(I)(J)(K) 666 FUN TI N RETURN PERATIN REVENUE REVENUE REVENUE BILLIN UNIT T IN-EA N IN-EA N UT-EA N ERVI E. 668 PR DU TI N 669 DEMAND - Base-load ummer 5,951,520 22,002,893 3,034,115 7,928,720 39,863,773 4,065,427 9.80556 9.80556 670 DEMAND - Peak 1,424,589 5,648,485 726,263 8,050,485 4,065,427 1.98023 1.98023 671 DEMAND - Base-load Non-umme 1,698,737 6,280,264 866,025 2,263,087 11,378,278 4,065,427 2.79879 2.79879 672 ENER Y - P WER UPPL 0 0 0 0 1,864,522,772 0.00000 673 ENER Y - ummer 262,263 47,312,458 133,703 44,750,407 1,508,526,794 0.02966 0.029665 674 ENER Y - Non-ummer 59,476 10,729,437 30,321 10,148,419 355,995,978 0.02851 0.028507 675 ENER Y - ANNUAL 0 1,864,522,772 0.00000 676 TRAN MI I N 0 677 DEMAND - P WER UPPL 0 0 0 0 0 0.00000 678 DEMAND - TRAN MI I N 6,274,670 12,350,192 3,198,859 15,038,335 4,065,427 3.69908 3.69908 679 DEMAND - UBTRAN MI I N 0 0 0 0 0 0.00000 680 DEMAND - DIRE T 0 0 0 0 0 0.00000 681 682 DI TRIBUTI N 0 683 UB TATI N - ENERAL 4,921,825 8,561,312 2,509,171 16,782,081 4,065,427 4.12800 4.12800 684 UB TATI N - DIRE T 0 0 0 0 0 0.00000 685 LINE - PRIMARY DEMAND 4,694,770 17,644,822 2,393,418 24,893,925 4,065,427 6.12332 6.12332 686 LINE - PRIMARY U T MER 278,852 1,048,038 142,160 1,478,609 230,147 6.42463 6.42463 687 LINE - E NDARY DIRE T 0 0 0 0 0 0.00000 688 LINE TRAN - PRIMARY DEMAN 1,215,307 1,604,060 619,570 3,559,971 4,065,427 0.87567 0.87567 689 LINE TRAN - PRIMARY U T 72,185 95,275 36,800 211,449 230,147 0.91876 0.91876 690 LINE TRAN - E ND DIRE T 0 0 0 0 0 0.00000 691 LINE TRAN - E ND DEMAND 4,128,425 5,449,201 2,104,692 12,093,453 4,065,427 2.97471 2.97471 692 LINE TRAN - E ND U T M 208,890 275,718 106,493 611,904 230,147 2.65875 2.65875 693 LINE - E NDARY DEMAND 0 0 0 0 4,065,427 0.00000 694 LINE - E NDARY U T ME 0 0 0 0 230,147 0.00000 695 ERVI E 51,984 124,361 26,502 203,809 230,147 0.88556 0.88556 696 METER 409,408 2,578,416 208,718 3,260,962 230,147 14.16905 14.16905 697 TREET LI HT 0 0 0 0 4,065,427 0.00000 698 IN TALL N U T PREMI E 0 86,309 0 86,309 230,147 0.37502 0.37502 699 0 700 U T MER A UNTIN 0 701 METER READIN 0 194,122 0 194,122 230,147 0.84347 0.84347 702 U T MER A UNT 0 1,034,129 0 1,034,129 230,147 4.49335 4.49335 703 UN LLE TIBLE 0 65,542 0 65,542 230,147 0.28478 0.28478 704 MI 0 0 0 0 230,147 0.00000 705 706 N UMER INF RMATI N 0 707 U T MER A I T 0 613,160 0 613,160 230,147 2.66421 2.66421 708 ALE EXPEN E 0 0 0 0 230,147 0.00000 709 ADVERTI IN 0 0 0 0 230,147 0.00000 710 MI 0 0 0 0 230,147 0.00000 711 712 MI ELLANE U 0 713 DEMAND 0 0 0 0 0 0.00000 714 ENER 0 265,137 0 265,137 1,864,522,772 0.00014 0.000142 0.000142 715 U T MER 0 0 0 0 230,147 0.00000 716 REVENUE 0 0 0 113,760 230,147 0.49430 0.49430 717 THER 0 75,286 0 75,286 230,147 0.32712 0.32712 718 UB TATI N IA 155,179 20,815 79,111 282,527 4,065,427 0.06949 0.06949 719 720 T TAL 31,497,721 144,017,803 16,057,699 10,191,807 194,263,258 32.31586 0.029807 0.028649 33.5504 Exhibit No. 43 Case No. IPC-E-23-11 P. Goralski IPC Page 8 of 8 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CASE NO. IPC-E-23-11 IDAHO POWER COMPANY GORALSKI, DI TESTIMONY EXHIBIT NO. 44 Idaho Power Company Idaho 2023 Marginal Cost Study Page 1 of 2 Idaho 2023 Marginal Cost Study The concept and design of the 2023 Marginal Cost Study is from the National Economic Research Associates Inc (NERA) marginal cost model. The NERA model is constantly being refined but the basic concepts and methods have remained the same since Idaho Power began using this method. In this analysis, generation capacity, transmission capacity and energy marginal costs are quantified for use in the Company’s class cost-of-service model. The following is a list of attachments: x Schedule 1, Marginal Cost of Energy x Schedule 2, page 1 of 2: Annual Generation Capacity Cost x Schedule 2, page 2 of 2: Seasonalized Generation Capacity Marginal Costs x Schedule 3, page 1 of 2: Annual Transmission Marginal Costs x Schedule 3, page 2 of 2: Seasonalized Transmission Marginal Costs I. MARGINAL COST OF ENERGY The marginal cost of energy was determined from the simulated hourly operation of the Company’s power supply system over 37 streamflow conditions for the five-year period 2023 through 2027. Base case net power supply expenses were quantified, and the model was run a second time with fifty megawatts (MW) of load added across all hours. The difference in monthly power supply expenses between the base run and the base-plus-50-MW run was averaged over the five-year period and was divided by the difference in monthly megawatt hours to produce an average monthly marginal cost per megawatt hour. A 2023 test year net power supply run was used for the 2023 base marginal cost run. For the years 2024 through 2027, updated loads along with current resource considerations at the time of the study were used. The 2023 test year gas prices were used, adjusted for each of the years using the Bureau of Labor Statistics: Produce Price Index; Moody’s Analytics. Coal plant operating characteristics, with the exception of coal costs, from the 2023 analysis were used for the entire period, 2023 – 2027. II. GENERATION CAPACITY MARGINAL COSTS The annual generation capacity marginal costs were derived from the surrogate capacity resource identified in the Company’s most recently acknowledged Integrated Resource Plan (IRP), the 2021 IRP, a 170-MW simple cycle combustion turbine. Plant investment included in the Company’s application was used and fixed operating and maintenance costs were obtained from the 2021 IRP Technical Appendix, p. 43. The carrying charge rate reflects the 2023 test year weighted cost of capital and a resource life of 32 years, from the Company’s 2022 Depreciation Study. General plant, A&G and materials & supplies Exhibit No. 44 Case No. IPC-E-23-11 P. Goralski, IPC Page 1 of 7 Idaho Power Company Idaho 2023 Marginal Cost Study Page 2 of 2 loading factors were derived from an average of historic data for the period 2018 through 2022. The reserve margin is 15.5% (2021 IRP, p. 140). III. SEASONALIZATION OF GENERATION CAPACITY MARGINAL COSTS The seasonalization of generation capacity marginal costs is based on information from the 2021 IRP. The Company plans new peaking generation capacity based on monthly peak hour load surplus/deficiency data, assuming 50th percentile water plus and 50th percentile plus 15.5% reserve margin load criteria used for planning purposes (2021 IRP Technical Appendix, p. 20-24). On this basis, during the five years 2023 through 2027, the IRP identifies the months of June through September as months which experience deficiencies. These are the months that are assigned generation capacity costs in the marginal cost analysis. The relative sizes of the five-year average monthly deficiencies were used to define the share of annual capacity cost assigned to each month. IV. TRANSMISSION MARGINAL COSTS The marginal cost of transmission reflects planned investment that has being included in the capital budget for the next ten years. The investment costs are for the years 2023 through 2032. The carrying charge rate reflects the 2023 test year weighted cost of capital and a resource life of 53 years, from the Company’s 2022 Depreciation Study. General plant, administrative & general and materials & supplies loading factors were derived from an average of historic data for the period 2018 through 2022. Demand related transmission O&M was estimated using historic data for the period 2018 through 2022. V. SEASONALIZATION OF TRANSMISSION MARGINAL COSTS Because the resource integration portion of marginal transmission investment is driven by the need for new generation resources, as identified in the 2021 IRP, these costs are assigned to months in the same manner as marginal generation capacity costs. The investment in the remainder of the network is driven by peak load growth on the system, irrespective of the introduction of new resources onto the grid. Therefore, that portion of marginal transmission costs is assigned to the months based on relative monthly peak load growth from 2023 through 2032. The two portions are summed, by month. This method results in the assignment of marginal transmission capacity costs to each of the twelve months of the year. Exhibit No. 44 Case No. IPC-E-23-11 P. Goralski, IPC Page 2 of 7 Annual Line Jan Feb Mar r Ma Jun Jul u Se Oct No Dec v . Mar inal Generation Cost at Generation 1/ $67.78 $31.10 $35.53 $27.36 $24.55 $30.89 $41.93 $45.21 $40.71 $41.07 $64.31 $85.21 $44.79 2 Mar inal Fuel Inventor $32.22 $32.22 $32.22 $32.22 $32.22 $32.22 $32.22 $32.22 $32.22 $32.22 $32.22 $32.22 Cost of Ca ital & Taxes for Fuel Inventor 3 2 x 9.54% 2/ $3.07 $3.07 $3.07 $3.07 $3.07 $3.07 $3.07 $3.07 $3.07 $3.07 $3.07 $3.07 4 Mar inal Variable O & M 3/ $4.82 $4.82 $4.82 $4.82 $4.82 $4.82 $4.82 $4.82 $4.82 $4.82 $4.82 $4.82 5 Mar inal ener cost at Generation Level $75.67 $38.99 $43.42 $35.26 $32.44 $38.78 $49.82 $53.10 $48.61 $48.96 $72.20 $93.10 verage System Loss Factor Coefficients at:4/6 Transmission 1.029 1.029 1.029 1.029 1.029 1.029 1.029 1.029 1.029 1.029 1.029 1.0297Distribution Station 1.036 1.036 1.036 1.036 1.036 1.036 1.036 1.036 1.036 1.036 1.036 1.036 8 Distribution Primar 1.051 1.051 1.051 1.051 1.051 1.051 1.051 1.051 1.051 1.051 1.051 1.051 9 Distribution Secondar 1.076 1.076 1.076 1.076 1.076 1.076 1.076 1.076 1.076 1.076 1.076 1.076 Mar inal Ener Cost at Service Level 10 Power Su l 5 $75.67 $38.99 $43.42 $35.26 $32.44 $38.78 $49.82 $53.10 $48.61 $48.96 $72.20 $93.10 $52.53 11 Transmission 6 x 5 $77.87 $40.13 $44.68 $36.28 $33.38 $39.91 $51.27 $54.64 $50.02 $50.38 $74.30 $95.80 $54.06 12 Distribution Station 7 x 5 $78.40 $40.40 $44.99 $36.53 $33.61 $40.18 $51.62 $55.01 $50.36 $50.73 $74.80 $96.45 $54.42 13 Distribution Primar 8 x 5 $79.53 $40.98 $45.64 $37.06 $34.09 $40.76 $52.36 $55.81 $51.08 $51.46 $75.89 $97.85 $55.21 14 Distribution Secondar 9 x 5 $81.42 $41.96 $46.72 $37.94 $34.90 $41.73 $53.61 $57.14 $52.30 $52.68 $77.69 $100.18 $56.52 1/ Aurora Power Su l Model 2023 to 2027 2/ Schedule 14. Based on 2023 Test Year Cost of Ca ital 3/ 2021 IRP Technical A endix, . 43 4/ Schedule 15 Idaho Power Company Marginal Cost Analysis 2023 Marginal Cost of Energy - Dollars/MWh Exhibit No. 44 Case No. IPC-E-23-11 P. Goralski, IPC Page 3 of 7 IDAHO POWER COMPANY MARGINAL COST ANALYSIS 2023 NNUAL GENERATION CAPACITY COST: DOLLARS PER KW (1) Investment ($/kw) 1/ $1,032.52 (2) General Plant Loading (1) x 1.09 2/ $1,123.24 (3) Economic Carrying Charge Rate 3/ 7.09% (4) A&G Loading .39% 4/ 0.39% (5) Total Carrying Charge 7.48% (6) Annual Cost ($/kw) (2) x (5) $84.06 (7) Demand related fixed O&M 5/ $1.02 (8) A&G loading (7) x 1.556 6/ $1.59 (9) Marginal Demand Related Costs (6) + (8) $85.64 Working Capital (10) Materials & Supplies (2) x 1.08% $12.15 (11) Revenue Requirement for Materials & Supplies (10) x 9.54% $1.16 (12) Total Marginal Demand Related Costs (9) + (11) rounded $86.80 (13) Adjusted for reserve margin (15.5%) 7/$100.00 Notes 1/ Total Investment of 2021 IRP Surrogate Resource - 170 MW SCCT $175,528,850 / 170 MW 2/ Schedule 14. Average general plant loading 2018-2022 3/ Schedule 13. Based on 2023 Test Year Cost of Capital 4/ Average A & G expenses 2018 - 2022 applicable to plant related expenses, Schedule 14 5/ Estimated cost of a simple cycle combustion turbine , IPCo 2021 IRP Technical Appendix, p.43 6/ Average A & G expenses 2018 - 2022 applicable to non-plant related expenses, Schedule 14 7/ IPCO 2021 IRP p. 140 Exhibit No. 44 Case No. IPC-E-23-11 P. Goralski, IPC Page 4 of 7 (1) (2) (3) Monthly % Share $/kw/yea Mar inal of Total 1/$100.00 Cos Month (1) X (2) (1)Jan 0.00% 0.00 (2)Feb 0.00% 0.00 (3)Ma 0.00% 0.00 (4)Ap 0.00% 0.00 (5)May 0.00% 0.00 (6)Jun 8.35% 8.35 (7)Jul 52.64% 52.64 (8)Au 38.20% 38.20 (9)Sep 0.81% 0.81 (10)Oc 0.00% 0.00 (11)No 0.00% 0.00 (12)Dec 0.00% 0.00 (13)Sum 100.00% 100.00 Notes 1/ G & T Assignment Factors Workpaper Seasonalized based on average monthly share of peak hour deficiencies for the five year period 2018-2022. Source: 2021 IRP Technical Appendix, p. 20-24 IDAHO POWER COMPANY Marginal Cost Analysis 2023 Seasonalized Generation Capacity Marginal Costs Exhibit No. 44 Case No. IPC-E-23-11 P. Goralski, IPC Page 5 of 7 Integration of New Resources Planned System Expansion Total (1)(2) (1) + (2) (1) Investment ($/kw) $0.00 $2,028.90 (2) With General Plant Loading (1) x 1.09 1/$0.00 $2,207.15 (3) Economic Carrying Charge Rate 2/ 6.01% 6.01% (4)&G Loadin .39% 3/0.39% 0.39% (5) Total Carrying Charge 6.40% 6.40% (6)nnual Cost ($/kw) (2) x (5)$0.00 $141.33 (7) Demand related O&M 4/$6.63 $6.63 (8) With A&G loading (7) x 1.556 5/$10.32 $10.32 (9) Marginal Demand Related Costs (6) + (8)$10.32 $151.65 Working Capital (10) Materials & Supplies (2) x 1.08%$0.00 $23.87 (11) Revenue Requirement and Taxes for Materials & Supplies (10) x 9.54% 6/$0.00 $2.28 (12) Total Marginal Demand Related Costs (9) + (11) Rounded $10.32 $153.93 (13) Total Annual Transmission Mar inal Costs (rounded)$10.00 $154.00 164.00$ Notes: 1/vera e eneral plant loadin 2018 - 2022, Schedule 14 2/ Schedule 13. Based on 2023 Test Year Cost of Capital 3/verage A & G expenses 2018 - 2022 applicable to plant related expenses, Schedule 14 4/vera e O&M 2018 - 2022 w/o accts. 565 & 567 5/verage A & G expenses 2018 - 2022 applicable to non-plant related expenses, Schedule 14 6/ Schedule 14. Based on 2023 Test Year Cost of Capital IDAHO POWER COMPANY Marginal Cost Analysis 2023 Annual Transmission Marginal Costs Dollars/kw Exhibit No. 44 Case No. IPC-E-23-11 P. Goralski, IPC Page 6 of 7 TOTAL (1) (2) (3) (4) (5) (6) (7) Monthly Monthly Monthly % Share $/kw/year 2/Marginal % Share $/kw/year 4/Marginal Marginal of Total 1/$10.00 Cost of Total 3/$154.00 Cost Cost Month (1) X (2) (1) X (2) (3) + (6) (1)Jan 0.00% $0.00 8.17% $12.58 12.58 (2)Feb 0.00% $0.00 7.51% $11.56 11.56 (3)Ma 0.00% $0.00 7.05% $10.86 10.86 (4)Ap 0.00% $0.00 6.56% $10.10 10.10 (5)May 0.00% $0.00 8.11% $12.49 12.49 (6)Jun 8.35% $0.84 9.15% $14.09 14.93 (7)Jul 52.64% $5.26 10.13% $15.60 20.86 (8)Aug 38.20% $3.82 11.05% $17.02 20.84 (9)Sep 0.81% $0.08 9.07% $13.97 14.05 (10)Oct 0.00% $0.00 7.62% $11.73 11.73 (11)Nov 0.00% $0.00 7.79% $12.00 12.00 (12)Dec 0.00% $0.00 7.79% $12.00 12.00 (13)Sum 100.00% $10.00 100.00% $154.00 164.00 Notes: 1/Seasonalized based on average monthly share of peak hour deficiencies for the five year period 2023-2027. Source: 2021 IRP Technical Appendix, p. 20-24 G & T Assignment Factors Workpaper 2/Schedule 3, page 1 of 2 3/Seasonalized based on monthly share of peak hour load growth between 2023 and 2027 Source: 2021 IRP Technical Appendix p. 7-9 G & T Assignment Factors Workpaper 4/Schedule 3, page 1 of 2 IDAHO POWER COMPANY Integration of New Resources Planned System Expansion Marginal Cost Analysis 2023 Seasonalized Transmission Marginal Costs Dollars /kw Exhibit No. 44 Case No. IPC-E-23-11 P. Goralski, IPC Page 7 of 7 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CASE NO. IPC-E-23-11 IDAHO POWER COMPANY GORALSKI, DI TESTIMONY EXHIBIT NO. 45 Mon u p er o a enera enera enera enera rea arge ower rr ga on arg na ur s c on es en a es en a -erv ce ervce-erv ce erv ce g ng ervce ervce os -r mary -econ ary -r mary -econ ary CAPACITY RELATED ALLOCATION FACTORS Twelve Monthly Coincident Demands @ Generation Level January 2,219,506 1,059,967 33,825 26,060 144 87,097 550,946 0 322,498 3,678 February 2,128,273 1,017,411 26,118 23,231 140 86,836 526,891 0 303,816 3,793 March 2,153,910 1,065,567 32,460 20,874 126 84,566 500,037 0 293,747 10,593 April 1,714,832 606,276 11,880 16,245 56 80,529 447,538 0 297,198 126,497 May 2,455,950 852,080 17,668 16,521 37 83,006 467,273 0 311,436 583,628 June 3,496,120 1,398,626 30,306 23,965 83 96,031 549,051 0 331,549 922,557 July 3,224,178 1,333,855 40,293 22,450 93 89,908 527,617 0 340,400 731,125 August 3,071,846 1,224,174 20,317 28,269 81 97,972 601,580 0 311,064 643,282 September 2,995,520 1,321,784 38,299 22,803 84 92,225 544,526 0 303,108 532,555 October 1,851,866 746,802 12,987 18,144 55 85,827 487,716 0 320,397 66,683 November 2,043,833 911,858 29,509 21,995 131 85,869 517,204 0 324,362 8,370 December 2,402,388 1,188,925 42,647 27,676 178 86,519 575,421 0 323,609 4,385 Total 29,758,221 12,727,324 336,308 268,233 1,208 1,056,385 6,295,799 0 3,783,183 3,637,146 Ratio 1.0000 0.4277 0.0113 0.0090 0.0000 0.0355 0.2116 0.0000 0.1271 0.1222 Actual D10BS 0.4297 0.1774 0.0043 0.0033 0.0000 0.0126 0.0747 0.0000 0.0432 0.0951 Actual D10BNS 0.5703 0.2503 0.0070 0.0057 0.0000 0.0229 0.1369 0.0000 0.0839 0.0271 Four Monthly Coincident Demands (June - September) @ Generation Level Power Supply Service - Generation January 0.00 0 0 0 0 0 0 0 0 0 0 February 0.00 0 0 0 0 0 0 0 0 0 0 March 0.00 0 0 0 0 0 0 0 0 0 0 April 0.00 0 0 0 0 0 0 0 0 0 0 May 0.00 0 0 0 0 0 0 0 0 0 0 June 1.00 3,496,120 1,398,626 30,306 23,965 83 96,031 549,051 0 331,549 922,557 July 1.00 3,224,178 1,333,855 40,293 22,450 93 89,908 527,617 0 340,400 731,125 August 1.00 3,071,846 1,224,174 20,317 28,269 81 97,972 601,580 0 311,064 643,282 September 1.00 2,995,520 1,321,784 38,299 22,803 84 92,225 544,526 0 303,108 532,555 October 0.00 0 0 0 0 0 0 0 0 0 0 November 0.00 0 0 0 0 0 0 0 0 0 0 December 0.00 0 0 0 0 0 0 0 0 0 0 Total 12,787,663 5,278,439 129,215 97,486 341 376,136 2,222,774 0 1,286,120 2,829,519 Ratio D10P 1.0000 0.4128 0.0101 0.0076 0.0000 0.0294 0.1738 0.0000 0.1006 0.2213 IDAHO POWER COMPANY DEVELOPMENT OF DEMAND AND ENERGY ALLOCATORS - RT DEL FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2023 Exhibit No. 45 Case No. IPC-E-23-11 P. Goralski IPC Page 1 of 6 Mon u p er o a arg na ur s c onos CAPACITY RELATED ALLOCATION FACTORS Twelve Monthly Coincident Demands @ Generatio January 2,219,506 February 2,128,273 March 2,153,910 April 1,714,832 May 2,455,950 June 3,496,120 July 3,224,178 August 3,071,846 September 2,995,520 October 1,851,866 November 2,043,833 December 2,402,388 Total 29,758,221 Ratio 1.0000 Actual D10BS 0.4297 Actual D10BNS 0.5703 Four Monthly Coincident Demands (June - Septem Power Supply Service - Generation January 0.00 0 February 0.00 0 March 0.00 0 April 0.00 0 May 0.00 0 June 1.00 3,496,120 July 1.00 3,224,178 August 1.00 3,071,846 September 1.00 2,995,520 October 0.00 0 November 0.00 0 December 0.00 0 Total 12,787,663 Ratio D10P 1.0000 Unme ere uncpa ra c o a o a ervce ree g on ro ar mp o cron pec a us omers on rac s 1,639 0 365 2,086,219 41,611 15,260 76,416 133,287 1,666 0 367 1,990,268 38,260 23,348 76,398 138,005 1,674 0 319 2,009,963 43,356 22,419 78,172 143,946 1,682 0 367 1,588,268 25,426 22,150 78,988 126,564 1,700 0 341 2,333,690 18,122 16,075 88,063 122,260 1,710 0 332 3,354,210 24,712 22,336 94,861 141,910 1,717 0 348 3,087,806 19,117 23,051 94,204 136,372 1,734 0 345 2,928,817 24,020 22,223 96,786 143,029 1,744 0 355 2,857,483 24,142 20,794 93,101 138,037 1,750 0 348 1,740,708 22,980 4,157 84,021 111,158 1,754 0 357 1,901,409 40,726 20,506 81,191 142,423 1,756 0 353 2,251,468 48,957 19,950 82,012 150,920 20,526 0 4,198 28,130,310 371,430 232,269 1,024,213 1,627,911 0.0007 0.0000 0.0001 0.9453 0.0125 0.0078 0.0344 0.0547 0.0002 0.0000 0.0000 0.3149 0.0031 0.0030 0.0127 0.0188 0.0005 0.0000 0.0001 0.6304 0.0094 0.0048 0.0217 0.0359 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1,710 0 332 3,354,211 24,712 22,336 94,861 141,910 1,717 0 348 3,087,807 19,117 23,051 94,204 136,372 1,734 0 345 2,928,818 24,020 22,223 96,786 143,029 1,744 0 355 2,857,484 24,142 20,794 93,101 138,037 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6,905 0 1,380 12,228,320 91,992 88,403 378,952 559,348 0.0005 0.0000 0.0001 0.9563 0.0072 0.0069 0.0296 0.0437 IDAHO POWER COMPANY DEVELOPMENT OF DEMAND AND ENERGY ALLOCATORS - RT DEL FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2023 Exhibit No. 45 Case No. IPC-E-23-11 P. Goralski IPC Page 2 of 6 Mon u p er o a enera enera enera enera rea arge ower rr ga on arg na ur s c on es en a es en a -erv ce ervce-erv ce erv ce g ng ervce ervce os -r mary -econ ary -r mary -econ ary IDAHO POWER COMPANY DEVELOPMENT OF DEMAND AND ENERGY ALLOCATORS - RT DEL FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2023 CAPACITY RELATED ALLOCATION FACTORS Monthly Coincident Demands @ Generation Level January 2,219,506 1,059,967 33,825 26,060 144 87,097 550,946 0 322,498 3,678 February 2,128,273 1,017,411 26,118 23,231 140 86,836 526,891 0 303,816 3,793 March 2,153,910 1,065,567 32,460 20,874 126 84,566 500,037 0 293,747 10,593 April 1,714,832 606,276 11,880 16,245 56 80,529 447,538 0 297,198 126,497 May 2,455,950 852,080 17,668 16,521 37 83,006 467,273 0 311,436 583,628 June 3,496,120 1,398,626 30,306 23,965 83 96,031 549,051 0 331,549 922,557 July 3,224,178 1,333,855 40,293 22,450 93 89,908 527,617 0 340,400 731,125 August 3,071,846 1,224,174 20,317 28,269 81 97,972 601,580 0 311,064 643,282 September 2,995,520 1,321,784 38,299 22,803 84 92,225 544,526 0 303,108 532,555 October 1,851,866 746,802 12,987 18,144 55 85,827 487,716 0 320,397 66,683 November 2,043,833 911,858 29,509 21,995 131 85,869 517,204 0 324,362 8,370 December 2,402,388 1,188,925 42,647 27,676 178 86,519 575,421 0 323,609 4,385 Total 29,758,221 12,727,324 336,308 268,233 1,208 1,056,385 6,295,799 0 3,783,183 3,637,146 Actual D13 1.0000 0.4277 0.0113 0.0090 0.0000 0.0355 0.2116 0.0000 0.1271 0.1222 Monthly Coincident Demands Weighted by Marginal Transmission Costs Transmission Service January 12.58 27,921,395 13,334,385 425,516 327,837 1,816 1,095,681 6,930,903 0 4,057,027 46,263 February 11.56 24,602,849 11,761,266 301,928 268,545 1,618 1,003,823 6,090,855 0 3,512,114 43,849 March 10.86 23,391,472 11,572,055 352,516 226,696 1,365 918,389 5,430,405 0 3,190,092 115,039 April 10.10 17,319,812 6,123,386 119,984 164,075 562 813,347 4,520,134 0 3,001,703 1,277,623 May 12.49 30,674,832 10,642,476 220,669 206,351 466 1,036,742 5,836,238 0 3,889,835 7,289,519 June 14.93 52,197,081 20,881,487 452,464 357,803 1,239 1,433,747 8,197,327 0 4,950,032 13,773,771 July 20.86 67,256,368 27,824,213 840,508 468,301 1,945 1,875,483 11,006,092 0 7,100,737 15,251,270 August 20.84 64,017,298 25,511,788 423,410 589,116 1,682 2,041,737 12,536,924 0 6,482,564 13,406,005 September 14.05 42,087,065 18,571,060 538,103 320,381 1,187 1,295,757 7,650,590 0 4,258,664 7,482,397 October 11.73 21,722,403 8,759,991 152,340 212,823 646 1,006,753 5,720,906 0 3,758,256 782,188 November 12.00 24,526,002 10,942,301 354,108 263,946 1,571 1,030,422 6,206,445 0 3,892,345 100,439 December 12.00 28,828,673 14,267,096 511,761 332,109 2,131 1,038,231 6,905,055 0 3,883,302 52,621 Total 424,545,087 180,191,502 4,693,306 3,737,982 16,228 14,590,112 87,031,875 0 51,976,671 59,620,984 Weighted D13 1.0000 0.4244 0.0111 0.0088 0.0000 0.0344 0.2050 0.0000 0.1224 0.1404 Average D13 1.0000 0.4261 0.0112 0.0089 0.0000 0.0349 0.2083 0.0000 0.1248 0.1313 Exhibit No. 45 Case No. IPC-E-23-11 P. Goralski IPC Page 3 of 6 Mon u p er o a arg na ur s c onos CAPACITY RELATED ALLOCATION FACTORS Monthly Coincident Demands @ Generation Level January 2,219,506 February 2,128,273 March 2,153,910 April 1,714,832 May 2,455,950 June 3,496,120 July 3,224,178 August 3,071,846 September 2,995,520 October 1,851,866 November 2,043,833 December 2,402,388 Total 29,758,221 Actual D13 1.0000 Monthly Coincident Demands Weighted by Margin Transmission Service January 12.58 27,921,395 February 11.56 24,602,849 March 10.86 23,391,472 April 10.10 17,319,812 May 12.49 30,674,832 June 14.93 52,197,081 July 20.86 67,256,368 August 20.84 64,017,298 September 14.05 42,087,065 October 11.73 21,722,403 November 12.00 24,526,002 December 12.00 28,828,673 Total 424,545,087 Weighted D13 1.0000 Average D13 1.0000 Unme ere uncpa ra c o a o a ervce ree g on ro ar mp o cron pec a us omers on rac s IDAHO POWER COMPANY DEVELOPMENT OF DEMAND AND ENERGY ALLOCATORS - RT DEL FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2023 1,639 0 365 2,086,219 41,611 15,260 76,416 133,287 1,666 0 367 1,990,268 38,260 23,348 76,398 138,005 1,674 0 319 2,009,963 43,356 22,419 78,172 143,946 1,682 0 367 1,588,268 25,426 22,150 78,988 126,564 1,700 0 341 2,333,690 18,122 16,075 88,063 122,260 1,710 0 332 3,354,210 24,712 22,336 94,861 141,910 1,717 0 348 3,087,806 19,117 23,051 94,204 136,372 1,734 0 345 2,928,817 24,020 22,223 96,786 143,029 1,744 0 355 2,857,483 24,142 20,794 93,101 138,037 1,750 0 348 1,740,708 22,980 4,157 84,021 111,158 1,754 0 357 1,901,409 40,726 20,506 81,191 142,423 1,756 0 353 2,251,468 48,957 19,950 82,012 150,920 20,526 0 4,198 28,130,310 371,430 232,269 1,024,213 1,627,911 0.0007 0.0000 0.0001 0.9453 0.0125 0.0078 0.0344 0.0547 20,613 0 4,592 26,244,644 523,466 191,968 961,317 1,676,751 19,254 0 4,244 23,007,508 442,280 269,902 883,158 1,595,341 18,179 0 3,467 21,828,214 470,844 243,467 848,947 1,563,258 16,988 0 3,708 16,041,519 256,800 223,716 797,778 1,278,293 21,236 0 4,255 29,147,800 226,344 200,778 1,099,911 1,527,033 25,525 0 4,957 50,078,367 368,956 333,476 1,416,282 2,118,714 35,825 0 7,256 64,411,650 398,785 480,838 1,965,095 2,844,718 36,133 0 7,193 61,036,572 500,572 463,129 2,017,025 2,980,726 24,506 0 4,991 40,147,649 339,202 292,151 1,308,063 1,939,416 20,529 0 4,079 20,418,522 269,559 48,761 985,561 1,303,881 21,045 0 4,288 22,816,923 488,712 246,077 974,290 1,709,079 21,075 0 4,241 27,017,633 587,488 239,404 984,148 1,811,040 280,908 0 57,269 402,197,002 4,873,008 3,233,668 14,241,574 22,348,249 0.0007 0.0000 0.0001 0.9474 0.0115 0.0076 0.0335 0.0526 0.0007 0.0000 0.0001 0.9463 0.0120 0.0077 0.0340 0.0537 Exhibit No. 45 Case No. IPC-E-23-11 P. Goralski IPC Page 4 of 6 Mon u p er o a enera enera enera enera rea arge ower rr ga on arg na ur s c on es en a es en a -erv ce ervce-erv ce erv ce g ng ervce ervce os -r mary -econ ary -r mary -econ ary IDAHO POWER COMPANY DEVELOPMENT OF DEMAND AND ENERGY ALLOCATORS - RT DEL FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2023 ENERGY RELATED ALLOCATION FACTORS on y nergy equ remen s enera on eve w anuar ,,,,,,,,,e ruar ,,,,,,,,,arc ,,,,,,,,,pr ,,,,,,,,, a ,,,,,,,,,une ,,,,,,,,,u ,,,,,,,,,ugus ,,,,,,,,,ep em er ,,,,,,,,, c o er ,,,,,,,,,ovem er ,,,,,,,,,ecem er ,,,,,,,,, o a ,,,,,,,,,,,,,, a o .......... c ua ..........c ua .......... on y nergy equ remen s eg e y arg na nergy os s ower uppy ervce - enera on anuar .,,,,,,,,,,,,,,,,, e ruar .,,,,,,,,,,,,,,,arc .,,,,,,,,,,,,,,,pr .,,,,,,,,,,,,,,,,a .,,,,,,,,,,,,,,,,une .,,,,,,,,,,,,,,,, u .,,,,,,,,,,,,,,,,ugus .,,,,,,,,,,,,,,,,ep em er .,,,,,,,,,,,,,,,,c o er .,,,,,,,,,,,,,,,,ovem er .,,,,,,,,,,,,,,,, ecem er .,,,,,,,,,,,,,,,,, o a ,,,,,,,,,,,,,,,,,,a o .......... e g e ..........e g e .......... Average ..........verage .......... Total Ratio 1.0000 0.3726 0.0105 0.0095 0.0000 0.0395 0.2251 0.0004 0.1566 0.1177 Exhibit No. 45 Case No. IPC-E-23-11 P. Goralski IPC Page 5 of 6 Mon u p er o a arg na ur s c onos ENERGY RELATED ALLOCATION FACTORS on y nergy equ remen s enera on eve anuar ,,e ruar ,,arc ,,pr ,, a ,,une ,,u ,,ugus ,,ep em er ,, c o er ,,ovem er ,,ecem er ,, o a ,, a o . c ua .c ua . on y nergy equ remen s eg e y arg n ower uppy ervce - enera on anuar .,, e ruar .,,arc .,,pr .,,a .,,une .,, u .,,ugus .,,ep em er .,,c o er .,,ovem er .,, ecem er .,, o a ,,a o . e g e .e g e . Average .verage . Total Ratio 1.0000 nme ere uncpa ra c o a o a ervce ree g on ro ar mp o cron pec a us omers on rac s IDAHO POWER COMPANY DEVELOPMENT OF DEMAND AND ENERGY ALLOCATORS - RT DEL FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2023 Ne 1,,,,,,52,94,,,,,,,45,85,,,,,,,48,88,,,,,,,45,80, ,,,,,,49,82,,,,,,,51,82,,,,,,,53,85,,,,,,,54,86,,,,,,,52,78, ,,,,,,51,87,,,,,,,53,90,,,,,,,56,97, ,,,,,,,,,, ........ ................ ,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,, ,,,,,,,,,,,,,,........ ................ 0................ 0.0009 0.0016 0.0002 0.9345 0.0154 0.0113 0.0388 0.0655 Exhibit No. 45 Case No. IPC-E-23-11 P. Goralski IPC Page 6 of 6 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CASE NO. IPC-E-23-11 IDAHO POWER COMPANY GORALSKI, DI TESTIMONY EXHIBIT NO. 46 IDAHO POWER COMPANY REVENUE REQUIREMENT ADJUSTMENTS TWELVE MONTHS ENDING DECEMBER 31, 2023 ALLOCATION TO CLASSES RESIDENTIAL RES. OS GEN SRV GEN SRV OS LRG SVR LRG SRV - SEC LIGHTING IND IRR UNMETERED ST LIGHT CONTROL DOE/INL JR SIMPLOT MICRON Total IPUC (1) (6) (7) (8) (9-P/T) (9-S) (15) (19-S/P/T) (24-S) (40) (41) (42) (30) (29) (26) Jurisdiction Bridger 28,903,005$ 763,736$ 609,141$ 2,743$ 2,398,989$ 14,297,391$ -$ 8,591,387$ 8,259,745$ 46,612$ -$ 9,533$ 843,495$ 527,469$ 2,325,928$ 67,579,174$ Valmy 15,806,391$ 417,670$ 333,125$ 1,500$ 1,311,952$ 7,818,915$ -$ 4,698,433$ 4,517,065$ 25,491$ -$ 5,213$ 461,288$ 288,461$ 1,271,997$ 36,957,501$ Storage ADITC (9,045,603)$ (239,022)$ (190,639)$ (859)$ (750,797)$ (4,474,570)$ -$ (2,688,796)$ (2,585,004)$ (14,588)$ -$ (2,983)$ (263,984)$ (165,079)$ (727,932)$ (21,149,854)$ 35,663,794$ 942,384$ 751,627$ 3,385$ 2,960,144$ 17,641,736$ -$ 10,601,024$ 10,191,807$ 57,515$ -$ 11,763$ 1,040,799$ 650,851$ 2,869,993$ 83,386,821$ Total D10BS 14,790,945$ 362,079$ 273,171$ 957$ 1,053,987$ 6,228,532$ -$ 3,603,894$ 7,928,720$ 19,349$ -$ 3,867$ 257,774$ 247,719$ 1,061,879$ 35,832,874$ Total D10BNS 20,872,849$ 580,305$ 478,455$ 2,428$ 1,906,156$ 11,413,204$ -$ 6,997,130$ 2,263,087$ 38,166$ -$ 7,895$ 783,025$ 403,131$ 1,808,114$ 47,553,947$ 35,663,794$ 942,384$ 751,627$ 3,385$ 2,960,144$ 17,641,736$ -$ 10,601,024$ 10,191,807$ 57,515$ -$ 11,763$ 1,040,799$ 650,851$ 2,869,993$ 83,386,821$ Exhibit No. 46 Case No. IPC-E-23-11 P. Goralski IPC Page 1 of 1 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CASE NO. IPC-E-23-11 IDAHO POWER COMPANY GORALSKI, DI TESTIMONY EXHIBIT NO. 47 IDAHO POWER COMPANY CCOS ALTERNATE SCENARIOS TWELVE MONTHS ENDING DECEMBER 31, 2023 Total Idaho Residential Residential On-Site Gen Small General Service Small General Service On- Site Gen* L. Gen Service - Prim. & Tran. Large Gen Service -Sec. Large Power Service Irrigation DOE Simplot Micron Lighting Total Sales Revenue (NM) $1,293.0M $566.1M $13.0M $17.8M $48,160 $43.6M $269.8M $153.9M $162.4M $13.3M $9.8M $36.6M $6.6M Revenue Requirement $1,404,314,821 $622.7M $19.6M $20.1M $100,951 $42.3M $269.6M $162.8M $198.6M $14.1M $9.9M $39.1M $5.4M Revenue Deficiency / (Excess)$111,304,981 $56.5M $6.6M $2.3M $52,791 ($1.2M) ($0.2M)$8.9M $36.1M $0.8M $0.0M $2.5M ($1.2M) % Change Required 8.61% 9.98% 50.56% 13.08% 109.62%-2.85% -0.07%5.79% 22.23% 6.15% 0.45% 6.96%-18.05% Revenue Requirement $0 $2.5M $0.1M $0.0M $470 $0.1M $1.0M $0.0M ($3.7M)$0.1M ($0.1M)$0.0M ($0.1M) % Change Required 0.00% 0.43% 0.71% 0.19% 0.98% 0.24% 0.36% 0.02%-2.27%0.78%-0.75%0.13%-0.92% Revenue Requirement $0 $0.7M $0.1M ($0.0M)$37 $0.0M $0.2M $0.0M ($1.1M)$0.0M $0.0M $0.0M $0.0M % Change Required 0.00% 0.12% 0.50% 0.00% 0.08% 0.08% 0.07% 0.01%-0.65%0.16% 0.01% 0.10% 0.02% Revenue Requirement $0 $2.8M $0.1M $0.0M $491 $0.1M $1.1M $0.0M ($4.3M)$0.1M ($0.1M)$0.1M ($0.1M) Revenue Deficiency / (Excess)($0)$2,849,947 $129,954 $33,859 $491 $122,526 $1,077,809 $39,582 ($4,303,585)$115,680 ($73,376)$66,675 ($59,565) % Change Required 0.00% 0.50% 1.00% 0.19% 1.02% 0.28% 0.40% 0.03%-2.65%0.87%-0.75%0.18%-0.90% *$ values in millions except for Small General Service On-Site Generation Combined Impact 2011 Methodology 2023 Class Cost-of-Service Alternate Scenarios Revenue Requirement Summary June - Sept. Summer Increm. Impact FV Classification Increm. Impact Exhibit No. 47 Case No. IPC-E-23-11 P. Goralski IPC Page 1 of 1 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CASE NO. IPC-E-23-11 IDAHO POWER COMPANY GORALSKI, DI TESTIMONY EXHIBIT NO. 48 Rate 2023 Average 2023 Sales Proformed Average Base Line Schedule Number of Normalized Normalized Mills per Revenue No.Tariff Description No.Customers (kWh)Revenue kWh Transfer Uniform Tariff Schedules 1 Residential Service 1,3,5 492,481 5,425,559,433 501,479,142 92.43 64,656,991 2 Residential Service - On Site Gen 6 13,288 122,912,496 11,567,368 94.11 1,465,405 3 Combined Residentia 505,768 5,548,471,929 513,046,510 92.4 66,122,396 4 Small General Service 7 30,401 138,285,160 16,102,622 116.45 1,658,298 5 Small General Service - On Site Gen 8 88 370,708 43,713 117.92 4,447 6 Combined Small General Service 30,488 138,655,868 16,146,335 116.45 1,662,745 7 Large General Service - Prim. & Trans. 9P, 9T 284 601,699,182 36,446,763 60.57 7,110,848 8 Large General Service - Secondary 9S 37,764 3,321,544,618 230,482,910 69.39 39,344,999 9 Dusk/Dawn Lighting 15 0 5,267,423 1,261,853 239.56 65,185 10 Large Power Service 19S, 19P, 19T 116 2,386,695,635 125,751,566 52.69 28,147,259 11 Irrigation Service 24 19,179 1,864,522,772 140,327,749 75.26 22,120,084 12 Unmetered Service 40 1,663 13,925,301 1,144,288 82.17 165,505 13 Municipal Street Lighting 41 2,980 23,760,014 3,463,322 145.76 287,095 14 Traffic Control Lighting 42 766 2,847,961 165,609 58.15 33,636 15 Total Idaho Rates 599,008 13,907,390,703 1,068,236,903 76.81 165,059,752 Special Contracts 16 Micron 26 1 591,344,540 29,622,353 50.09 6,969,186 17 Simplot 29 1 175,000,001 7,759,368 44.34 2,059,297 18 DOE/INL 30 1 234,100,000 10,547,708 45.06 2,755,273 19 Total Specials 3 1,000,444,541 47,929,429 47.91 11,783,756 20 Total Idaho Retail Sales* 599,011 14,907,835,244 1,116,166,332 74.87 176,843,508 *Sales exclude Black Mesa sales Proformed Normalized Sales and Revenue 12 Months Ending December 31, 2023 Revenue Allocation Summary Before the Idaho Public Utilities Commission Idaho Power Company Exhibit No. 48 Case No. IPC-E-23-11 P. Goralski IPC Page 1 of 5 Rate COS COS Retail Revenue Average Line Schedule Percent Sales W/ COS Allocation at Mills per No.Tariff Description No.Change Trnsfr. Adj.Revenue Change COS kWh Uniform Tariff Schedules 1 Residential Service 1,3,5 10.49% 566,136,133 59,368,700 625,504,833 115.29 2 Residential Service - On Site Gen 6 51.56%13,032,773 6,719,340 19,752,112 160.70 3 Combined Residential 11.41 579,168,90 66,088,040 645,256,94 116.29 4 Small General Service 7 13.27% 17,760,920 2,356,962 20,117,882 145.48 5 Small General Service - On Site Gen 8 110.64%48,160 53,282 101,442 273.64 6 Combined Small General Service 13.53 17,809,080 2,410,244 20,219,324 145.82 7 Large General Service - Prim. & Trans. 9P, 9T -2.57% 43,557,610 (1,118,189) 42,439,422 70.53 8 Large General Service - Secondary 9S 0.33% 269,827,909 890,106 270,718,015 81.50 9 Dusk/Dawn Lighting 15 -44.41% 1,327,038 (589,394) 737,644 140.04 10 Large Power Service 19S, 19P, 19T 5.82% 153,898,825 8,949,254 162,848,079 68.23 11 Irrigation Service 24 19.59% 162,447,833 31,815,425 194,263,258 104.19 12 Unmetered Service 40 2.48% 1,309,792 32,435 1,342,227 96.39 13 Municipal Street Lighting 41 -24.67% 3,750,417 (925,400) 2,825,017 118.90 14 Traffic Control Lighting 42 117.51% 199,244 234,134 433,379 152.17 15 Total Idaho Rates 8.74% 1,233,296,655 107,786,657 1,341,083,312 96.43 Special Contracts 16 Micron 26 7.14% 36,591,539 2,613,571 39,205,110 66.30 17 Simplot 29 -0.30% 9,818,665 (29,165) 9,789,500 55.94 18 DOE/INL 30 7.02%13,302,981 933,918 14,236,899 60.82 19 Total Specials 5.89% 59,713,185 3,518,324 63,231,509 63.20 20 Total Idaho Retail Sales* 8.61% 1,293,009,840 111,304,981 1,404,314,821 94.20 *Sales exclude Black Mesa sales Idaho Power Company Before the Idaho Public Utilities Commission Revenue Allocation Summary 12 Months Ending December 31, 2023 4CP/12CP Cost-of-Service Results Exhibit No. 48 Case No. IPC-E-23-11 P. Goralski IPC Page 2 of 5 Rate First Pass First Pass Line Schedule Percent First Pass Revenue No.Tariff Description No.Change Revenue Change Allocation Uniform Tariff Schedules 1 Residential Service 1,3,5 2 Residential Service - On Site Gen 6 3 Combined Residential 1,3,5,6 11.41% 66,088,040 645,256,946 4 Small General Service 7 5 Small General Service - On Site Gen 8 6 Combined Small General Service 7,8 12.91% 2,299,564 20,108,644 7 Large General Service - Prim. & Trans. 9P, 9T 0.00% 0 43,557,610 8 Large General Service - Secondary 9S 0.33% 890,106 270,718,015 9 Dusk/Dawn Lighting 15 0.00% 0 1,327,038 10 Large Power Service 19S, 19P, 19T 5.82% 8,949,254 162,848,079 11 Irrigation Service 24 12.91% 20,975,772 183,423,605 12 Unmetered Service 40 2.48% 32,435 1,342,227 13 Municipal Street Lighting 41 0.00% 0 3,750,417 14 Traffic Control Lighting 42 12.91% 25,727 224,972 15 Total Idaho Rates 8.05% 99,260,898 1,332,557,553 Special Contracts 16 Micron 26 7.14% 2,613,571 39,205,110 17 Simplot 29 0.00% 0 9,818,665 18 DOE/INL 30 7.02%933,918 14,236,899 19 Total Specials 5.94% 3,547,489 63,260,674 20 Total Idaho Retail Sales* 7.95% 102,808,387 1,395,818,227 21 Revenue Requirement Shortfall 8,496,594 *Sales exclude Black Mesa sales Idaho Power Company Before the Idaho Public Utilities Commission Revenue Allocation Summary 12 Months Ending December 31, 2023 First Pass Revenue Allocation Exhibit No. 48 Case No. IPC-E-23-11 P. Goralski IPC Page 3 of 5 Rate Second Pass Second Pass Line Schedule Second Pass Percent Revenue No.Tariff Description No.Revenue Change Change Allocation Uniform Tariff Schedules 1 Residential Service 1,3,5 2 Residential Service - On Site Gen 6 3 Combined Residential 1,3,5,6 4,836,319 12.25% 650,093,265 4 Small General Service 7 5 Small General Service - On Site Gen 8 6 Combined Small General Service 7,8 0 12.91% 20,108,644 7 Large General Service - Prim. & Trans. 9P, 9T 0 0.00% 43,557,610 8 Large General Service - Secondary 9S 2,029,081 1.08% 272,747,096 9 Dusk/Dawn Lighting 15 0 0.00% 1,327,038 10 Large Power Service 19S, 19P, 19T 1,220,576 6.61% 164,068,656 11 Irrigation Service 24 0 12.91% 183,423,605 12 Unmetered Service 40 10,060 3.24% 1,352,288 13 Municipal Street Lighting 41 0 0.00% 3,750,417 14 Traffic Control Lighting 42 0 12.91% 224,972 15 Total Idaho Rates 8,096,037 8.70% 1,340,653,590 Special Contracts 16 Micron 26 293,849 7.95% 39,498,960 17 Simplot 29 0 0.00% 9,818,665 18 DOE/INL 30 106,708 7.82%14,343,607 19 Total Specials 400,558 6.61% 63,661,231 20 Total Idaho Retail Sales 8,496,594 8.61% 1,404,314,821 21 Revenue Requirement Shortfall - *Sales exclude Black Mesa sales Idaho Power Company Before the Idaho Public Utilities Commission Revenue Allocation Summary 12 Months Ending December 31, 2023 Second Pass Revenue Allocation Exhibit No. 48 Case No. IPC-E-23-11 P. Goralski IPC Page 4 of 5 Rate Final Final Final Average Cost of Line Schedule Percent Revenue Revenue Mills per Service No.Tariff Description No.Change Change Allocation kWh Index Uniform Tariff Schedules 1 Residential Service 1,3,5 2 Residential Service - On Site Gen 6 3 Combined Residential 12.25% $70,924,359 650,093,265 117.17 101% 4 Small General Service 7 5 Small General Service - On Site Gen 8 6 Combined Small General Service 12.91% $2,299,564 20,108,644 145.03 99% 7 Large General Service - Prim. & Trans. 9P, 9T 0.00% $0 43,557,610 72.39 103% 8 Large General Service - Secondary 9S 1.08% $2,919,187 272,747,096 82.11 101% 9 Dusk/Dawn Lighting 15 0.00% $0 1,327,038 251.93 180% 10 Large Power Service 19S, 19P, 19T 6.61% $10,169,831 164,068,656 68.74 101% 11 Irrigation Service 24 12.91% $20,975,772 183,423,605 98.38 94% 12 Unmetered Service 40 3.24% $42,495 1,352,288 97.11 101% 13 Municipal Street Lighting 41 0.00% $0 3,750,417 157.85 133% 14 Traffic Control Lighting 42 12.91%$25,727 224,972 78.99 52% 15 Total Idaho Rates 8.70% $107,356,935 1,340,653,590 96.40 Special Contracts 16 Micron 26 7.95% $2,907,421 39,498,960 66.80 101% 17 Simplot 29 0.00% $0 9,818,665 56.11 100% 18 DOE/INL 30 7.82%$1,040,626 14,343,607 61.27 101% 19 Total Specials 6.61% $3,948,046 63,661,231 63.63 20 Total Idaho Retail Sales* 8.61% $111,304,981 1,404,314,821 94.20 *Sales exclude Black Mesa sales Final Revenue Allocation 12 Months Ending December 31, 2023 Revenue Allocation Summary Before the Idaho Public Utilities Commission Idaho Power Company Exhibit No. 48 Case No. IPC-E-23-11 P. Goralski IPC Page 5 of 5 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CASE NO. IPC-E-23-11 IDAHO POWER COMPANY GORALSKI, DI TESTIMONY EXHIBIT NO. 49 A B C D E F A&G Expense Rate Base Expenses Income Tax Exclusion Other Revenue Subsidiary Income Source Ex. 38, L. 12 Ex. 38, L. 72 & 114 Table II, Col. E See Note 1 See Note 2 Ex. 42, L. 35 Generation Function Energy-Related 53,590,613 494,937,324 495,994 1,855,842 29,557,875 1,759,534 G H I J K Total Revenue Current Return Desired Return Revenue Short-Fall Tax Gross-up Requirement Source A x 7.172% (3) A x 7.702% (4) H-G I x 1.34662 - I B+C-D-E-F+H+J Generation Function Energy-Related 3,843,519 4,127,549 284,030 98,451 $466,486,067 Notes: (1) Exhibit 37, Lines 499-558. The portion of the overall A&G exclusion associated with the energy-releated generation function (Table 5; FERC accounts 900-935; 416) (2) Exhibit 38, Line 132 (3) Exhibit 42, Line 38 (4) Exhibit 42, Line 43 IDAHO POWER COMPANY Development of Sales Based Adjustment Rate 2023 Test Year Table I Derivation of Energy-Related Generation Function Revenue Requirement Exhibit No. 49 Case No. IPC-E-23-11 P. Goralski, IPC Page 1 of 3 A B C D E Energy-Related Total Federal Total State Income Generation Function Allocated Income Income Tax Tax Rate Base Total Rate Base Taxes Source Ex. 42, L. 28 Ex 42, L. 29 Ex. 38, L. 12 Ex. 38, L. 60 (A + B) x (C / D) Generation Function Energy-Related 39,040,245 (2,828,435) 53,590,613 3,912,569,823 495,994 IDAHO POWER COMPANY Development of Sales Based Adjustment Rate 2023 Test Year Table II Derivation of Energy-Related Generation Function Revenue Requirement Exhibit No. 49 Case No. IPC-E-23-11 P. Goralski, IPC Page 2 of 3 A B C Energy-Related Generation 2023 Test Year Idaho Sales Based Function Revenue Retail Sales Adjusted Rate Requirement (MWh) ($/MWh) Source Table I, Col K. Ex. 39, Table 23, L. 55 / 1000 A / B Generation Function Energy-Related $466,486,067 14,907,835 $31.29 IDAHO POWER COMPANY Development of Sales Based Adjustment Rate 2023 Test Year Table III Derivation of Energy-Related Generation Function Revenue Requirement Exhibit No. 49 Case No. IPC-E-23-11 P. Goralski, IPC Page 3 of 3 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CASE NO. IPC-E-23-11 IDAHO POWER COMPANY GORALSKI, DI TESTIMONY EXHIBIT NO. 50 A B C D E F Rate COS Distribution and Line Schedule Revenue Generation Transmission Customer Total Fixed Cost No. Uniform Tariff Schedules No. Requirement Fixed Costs Fixed Costs Fixed Costs Fixed Costs % of Total Cost B+C+D E ÷ A 1 Residential Service 1, 3 & 5 625,504,833 191,167,686 46,602,187 213,277,804 451,047,677 72.1% 2 Residential Service - On Site Gen 6 19,752,112 5,331,189 1,435,880 8,056,109 14,823,178 75.0% 3 Small General Service 7 20,117,882 4,025,369 998,664 10,663,801 15,687,835 78.0% 4 Small General Service - On Site Gen 8 101,442 19,596 5,628 56,871 82,095 80.9% 5 Large General Service 9 313,157,436 107,548,029 25,485,729 56,313,163 189,346,922 60.5% 6 Dusk/Dawn Lighting 15 737,644 - - 573,342 573,342 77.7% 7 Large Power Service 19 162,848,079 56,747,920 14,142,328 18,565,502 89,455,750 54.9% 8 Irrigation Service 24 194,263,258 59,292,537 15,038,335 64,768,424 139,099,295 71.6% 9 Unmetered Service 40 1,342,227 301,332 72,191 530,532 904,055 67.4% 10 Municipal Street Lighting 41 2,825,017 - - 2,078,765 2,078,765 73.6% 11 Traffic Control Lighting 42 433,379 72,432 22,281 248,391 343,103 79.2% 12 Special Contracts 26, 29, & 30 63,231,509 24,687,354 6,257,439 1,587,849 32,532,642 51.5% 13 Total FCA Tariff Schedules 1,404,314,821 935,974,660 Based Upon GRC Filing - IPC-E-23-11 - Filed June 01, 2023 IDAHO POWER COMPANY Development of Fixed Cost Adjustment Rate 2023 Test Year Table I Class Cost of Service Functionalized Costs Exhibit No. 50 Case No. IPC-E-23-11 P. Goralski, IPC Page 1 of 5 A B C D E F G Proposed COS Revenue Fixed Cost Fixed Cost Line Schedule Base Rate Revenue Short-Fall Revenue % of Portion of Rev. No. Uniform Tariff Schedules No. Revenue Requirement Difference Identifier Short-Fall Total Cost Short-Fall Table I, Col. A A - B Table I, Col. F E x F 1 Residential Service 1, 3 & 5 635,369,891 625,504,833 9,865,057 2 Residential Service - On Site Gen 6 14,723,374 19,752,112 (5,028,738) X (5,028,738) 75.0% (3,773,869) 3 Small General Service 7 20,053,424 20,117,882 (64,458) X (64,458) 78.0% (50,264) 4 Small General Service - On Site Gen 8 55,219 101,442 (46,223) X (46,223) 80.9% (37,407) 5 Large General Service 9 316,304,706 313,157,436 3,147,270 6 Dusk/Dawn Lighting 15 1,327,038 737,644 589,394 7 Large Power Service 19 164,068,656 162,848,079 1,220,576 8 Irrigation Service 24 183,423,605 194,263,258 (10,839,653) X (10,839,653) 71.6% (7,761,571) 9 Unmetered Service 40 1,352,288 1,342,227 10,060 10 Municipal Street Lighting 41 3,750,417 2,825,017 925,400 11 Traffic Control Lighting 42 224,972 433,379 (208,407) X (208,407) 79.2% (164,995) 12 Special Contracts 26, 29, & 30 63,661,231 63,231,509 429,722 13 Total Uniform Tariff Schedules 1,404,314,821 1,404,314,821 0 (16,187,479) (11,788,106) Notes: (a) The "Weighted Average Fixed Cost % of Short-Fall" is calculated by dividing the total "Fixed Cost Portion of Rev. Short-Fall" (Col. G) by the total "Revenue Short-Fall" (Col. E) Weighted Average Fixed Cost % of Short-Fall a 72.8% IDAHO POWER COMPANY Development of Fixed Cost Adjustment Rate 2023 Test Year Table II Identification of Interclass Revenue Subsidy Based Upon GRC Filing - IPC-E-23-11 - Filed June 01, 2023 Exhibit No. 50 Case No. IPC-E-23-11 P. Goralski, IPC Page 2 of 5 A B C D E F 2023 2023 Sales Share of Total Line Schedule Avg. Number of Normalized COS COS Revenue Base Rate No. Uniform Tariff Schedules No. Customers (kWh) Fixed Cost Variable Cost Short-Fall/Subsidy Revenue Table I, Col. E Table I, Col. A - Col. C Table II, Col. C C+D+E 1 Residential Service 1, 3 & 5 492,481 5,425,559,433 451,047,677 174,457,157 9,865,057 635,369,891 2 Residential Service - On Site Gen 6 13,288 122,912,496 14,823,178 4,928,934 (5,028,738) 14,723,374 3 Small General Service 7 30,401 138,285,160 15,687,835 4,430,047 (64,458) 20,053,424 4 Small General Service - On Site Gen 8 88 370,708 82,095 19,347 (46,223) 55,219 G H I J K L COS Fixed Cost COS Fixed Cost Fixed Cost Total Fixed Cost Calculation of Calculation of Line Schedule Revenue from Revenue from Share of Revenue Revenue from FCC FCE No. Uniform Tariff Schedules No. Fixed Charges Energy Charges Short-Fall/Subsidy Energy Charges ($/Cust./Yr.) ($/kWh) C-G E x 72.8 H + I J ÷ A J ÷ B 1 (Cont.) Residential Service 1, 3 & 5* 91,198,683 359,848,994 7,183,968 367,032,962 745.27$ 0.067649$ 2 (Cont.) Residential Service - On Site Gen 6 2,445,141 12,378,037 (3,662,046) 8,715,991 655.94$ 0.070912$ 3 (Cont.) Small General Service 7 7,374,576 8,313,259 (46,940) 8,266,319 271.91$ 0.059777$ 4 (Cont.) Small General Service - On Site Gen 8 21,216 60,879 (33,661) 27,218 311.07$ 0.073423$ * FCE not applicable to Residential I05; see I05 FCE determination Based Upon GRC Filing - IPC-E-23-11 - Filed June 01, 2023 IDAHO POWER COMPAN Development of Fixed Cost Adjustment Rate 2023 Test Year Table III Derivation of Fixed Cost per Customer and Fixed Cost per Energy Rates Exhibit No. 50 Case No. IPC-E-23-11 P. Goralski, IPC Page 3 of 5 A B C D E F 2023 2023 Sales Distribution and Schedule Avg. Number of Normalized Generation Transmission Customer Total Uniform Tariff Schedules No. Customers (kWh) Fixed Costs Fixed Costs Fixed Costs Fixed Costs C + D + E 1 Residential Service 1, 3 & 5 492,481 5,425,559,433 191,167,686 46,602,187 213,277,804 451,047,677 2 Residential Service Fixed Cost Proportions 1, 3 & 5 42.4% 10.3% 47.3% 100.0% 3 Residential On-Site Gen Service 6 13,288 122,912,496 5,331,189 1,435,880 8,056,109 14,823,178 4 Residential On-Site Gen Service Fixed Cost Proportions 6 36.0% 9.7% 54.3% 100.0% 5 Small General Service 7 30,401 138,285,160 4,025,369 998,664 10,663,801 15,687,835 6 Small General Service Fixed Cost Proportions 7 25.7% 6.4% 68.0% 100.0% 7 Small General Service On-Site Gen 8 88 370,708 19,596 5,628 56,871 82,095 8 Small General Service On-Site Gen Fixed Cost Proportions 8 23.9% 6.9% 69.3% 100.0% G H I J K L Fixed Cost Distribution COS Fixed Cost Total Fixed Cost Calculation of Calculation of Schedule Share of Revenue Share of Revenue from Revenue from FCC - Dist FCE - Dist Uniform Tariff Schedules No. Short-Fall/Subsidy Short-Fall/Subsidy Fixed Charges Energy Charges ($/Cust./Yr.) ($/kWh) (Proportion E) x G E + H - I J ÷ A J ÷ B 1 (Cont.) Residential Service 1, 3 & 5* 7,183,968 3,396,938 91,198,683 125,476,059 254.78$ 0.023127$ 3 (Cont.) Residential On-Site Gen Service 6 (3,662,046) (1,990,251) 2,445,141 3,620,717 272.49$ 0.029458$ 5 (Cont.) Small General Service 7 (46,940) (31,907) 7,374,576 3,257,318 107.15$ 0.023555$ 7 (Cont.) Small General Service On-Site Gen 8 (33,661) (23,318) 21,216 12,337 140.99$ 0.033278$ * FCE not applicable to Residential I05; see I05 FCE determination Based Upon GRC Filing - IPC-E-23-11 - Filed June 01, 2023 Derivation of Fixed Cost per Customer and Fixed Cost per Energy Rates 2023 Test Year Development of Fixed Cost Adjustment Rate IDAHO POWER COMPANY Exhibit No. 50 Case No. IPC-E-23-11 P. Goralski, IPC Page 4 of 5 Existing New Customer January 1, 2024 January 1, 2024 Avg Customers 986.31 986.31 FCC 745.27$ 254.78$ Total Fixed Cost Recovery 735,070$ 251,291.64$ FCE 0.067649$ 0.023127$ Total kWh 16,947,350 16,947,350 Fixed Cost Recovery in Energy 1,146,469$ 391,941$ Revenue Collection Service Charge $177,623 177,623$ Summer Energy 587,925$ 587,925$ Non-Summer Energy 1,138,777$ 1,138,777$ Total Energy Collection 1,726,702$ 1,726,702$ Total Revenue 1,904,324$ 1,904,324$ Energy in Energy 580,233$ 1,334,761$ Summer Share Energy in Energy 178,320.66$ 410,206.69$ SONP Energy in Energy Rate 0.084817$ 0.195113$ SOFP Energy in Energy Rate 0.021204$ 0.048778$ Check 178,320.66$ 410,206.69$ Non-Summer Energy in Energy 401,912.16$ 924,553.86$ NSONP Energy in Energy Rate 0.047556$ 0.109397$ NSOFP Energy in Energy Rate 0.031704$ 0.072931$ Check 401,912.16$ 924,553.86$ SONP Rate 0.279642$ 0.279642$ SOFP Rate 0.069911$ 0.069911$ NSONP Rate 0.134745$ 0.134745$ NSOFP Rate 0.089830$ 0.089830$ SONP FCE Rate 0.194825$ 0.084529$ SOFP FCE Rate 0.048707$ 0.021133$ NSONP FCE Rate 0.087189$ 0.025348$ NSOFP FCE Rate 0.058126$ 0.016899$ Based Upon GRC Filing - IPC-E-23-11 - Filed June 01, 2023 Derivation of Fixed Cost per Energy Rates - Schedule 5 2023 Test Year Development of Fixed Cost Adjustment Rate IDAHO POWER COMPANY Exhibit No. 50 Case No. IPC-E-23-11 P. Goralski, IPC Page 5 of 5 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CASE NO. IPC-E-23-11 IDAHO POWER COMPANY GORALSKI, DI TESTIMONY EXHIBIT NO. 51 Idaho Power Company State of Idaho Calculation of Proposed Rates Filed June 1, 2023 IPC-E-23-11 Micron Schedule 26 Test Year Current Test Year Proposed Proposed Line Billing Base Base Effective Effective Revenue Percent No.Description Units Rate Revenue Rate Revenue Difference Change 1 Contract Demand ($/kW) 918,000 1.67$ 1,533,060$ 3.11$ 2,854,980$ 1,321,920$ 86.23% 2 Billed kW ($/kW) 1,017,744 10.98$ 11,174,829 18.12$ 18,441,469 7,266,639 65.03% 3 Excess Demand kW ($/kW) - 0.291$ - 1.244$ - - 0.00% 4 Embedded Energy Fixed Cost Charge ($/kWh) 101,867,460 0.002632$ 268,115 -$ - (268,115) -100.00% 5 Billed kWh ($/kWh) 591,344,540 0.028150$ 16,646,349 0.030782$ 18,202,511 1,556,162 9.35% 6 Transfer Adjustment 6,969,186 - 7 Subtotal 36,591,539$ 39,498,960$ 2,907,421$ 7.95% Exhibit No. 51 Case No. IPC-E-23-11 P. Goralski IPC Page 1 of 8 Idaho Power Company State of Idaho Calculation of Proposed Rates Filed June 1, 2023 IPC-E-23-11 Simplot Schedule 29 Test Year Current Test Year Proposed Proposed Line Billing Base Base Effective Effective Revenue Percent No.Description Units Rate Revenue Rate Revenue Difference Change 1 Contract Demand ($/kW) 300,000 2.31$ 693,000$ 3.11$ 933,000$ 240,000$ 34.63% 1 Billed kW ($/kW) 267,258 7.88$ 2,105,993 13.43$ 3,589,135 1,483,142 70.42% 2 Excess Demand kW ($/kW) - 0.292$ - 1.244$ - - 3 Billed kWh ($/kWh) 175,000,001 0.028345$ 4,960,375 0.030266$ 5,296,530 336,155 6.78% 4 Transfer Adjustment 2,059,297 - (2,059,297) 5 Subtotal 9,818,665$ 9,818,665$ -$ 0.00% Exhibit No. 51 Case No. IPC-E-23-11 P. Goralski IPC Page 2 of 8 Idaho Power Company State of Idaho Calculation of Proposed Rates Filed June 1, 2023 IPC-E-23-11 Department of Energy Schedule 30 Test Year Current Test Year Proposed Proposed Line Billing Base Base Effective Effective Revenue Percent No.Description Units Rate Revenue Rate Revenue Difference Change 1 Contract Demand ($/kW) - -$ -$ -$ -$ -$ 2 Billed kW ($/kW) 422,686 8.50$ 3,592,831 16.90$ 7,143,781 3,550,950 98.83% 3 Excess Demand kW ($/kW) - -$ - -$ - - 4 Billed kWh ($/kWh) 234,100,000 0.029709$ 6,954,877 0.030755$ 7,199,826 244,949 3.52% 5 Transfer Adjustment 2,755,273 - (2,755,273) 6 Subtotal 13,302,981$ 14,343,607$ 1,040,626$ 7.82% Exhibit No. 51 Case No. IPC-E-23-11 P. Goralski IPC Page 3 of 8 Idaho Power Company State of Idaho Calculation of Proposed Rates Filed June 1, 2023 IPC-E-23-11 Simplot Caldwell Schedule 32 Test Year Current Test Year Proposed Proposed Line Billing Base Base Effective Effective Revenue Percent No.Description Units Rate Revenue Rate Revenue Difference Change 1 Summer Contract Demand ($/kW) 88,000 1.78$ 156,640$ 3.11$ 273,680$ 117,040$ 74.72% 2 Non-Summer Contract Demand ($/kW) 156,000 1.78$ 277,680$ 3.11$ 485,160$ 207,480$ 74.72% 3 Summer Billed kW ($/kW) 87,371 14.87$ 1,299,213 19.71$ 1,721,983 422,770$ 32.54% 4 Non-Summer Billed kW ($/kW) 153,465 8.65$ 1,327,469 16.32$ 2,504,297 1,176,827$ 88.65% 5 Summer Excess Demand kW ($/kW) - 0.298$ - 1.244$ - -$ 6 Non-Summer Excess Demand kW ($/kW) - 0.298$ - 1.244$ - -$ 7 Summer Energy Charge ($/kWh) 56,000,000 0.031252$ 1,750,112 0.029262$ 1,638,653 (111,459)$ -6.37% 8 Non-Summer Energy Charge ($/kWh) 106,000,000 0.030664$ 3,250,384 0.031591$ 3,348,649 98,265$ 3.02% 9 Transfer Adjustment 1,904,406 - (1,904,406)$ 10 Subtotal 9,965,904$ 9,972,422$ 6,518$ 0.07% Exhibit No. 51 Case No. IPC-E-23-11 P. Goralski IPC Page 4 of 8 Line No. 1 Annual Cost ($) 12,100,144$ 2 Proposed 19P Revenue (8,867,527)$ 3 Remaining Cost for Block 2 capacity 3,232,617$ 4 Contract Demand ($/kW) $3.11 5 Contract Demand Billing Determinant (kW) 144,000 6 less Contract Demand recovery (447,840)$ 7 Block 2 Billed Demand Capacity Cost 2,784,777$ 8 Block 2 Demand Billing Determinant (kW) 117,000 9 Billed Demand Charge ($/kW) 23.80$ State of Idaho Idaho Power Company Schedule 34 Lamb Weston - Block 2 Billing Demand IPC-E-23-11 Filed June 1, 2023 Calculation of Proposed Rates Exhibit No. 51 Case No. IPC-E-23-11 P. Goralski IPC Page 5 of 8 Line No. 1 Annual Cost ($) 9,603,080$ 2 Proposed 19T Revenue (6,580,994)$ 3 Remaining Cost for Block 2 capacity 3,022,087$ 4 Contract Demand ($/kW) ($3.11) 5 Contract Demand Billing Determinant (kW) 120,000 6 less Contract Demand recovery (373,200)$ 7 Block 2 Billed Demand Capacity Cost 2,648,887$ 8 Block 2 Demand Billing Determinant (kW) 120,000 9 Billed Demand Charge ($/kW) 22.07$ Schedule 33 Idaho Power Company State of Idaho Calculation of Proposed Rates Filed June 1, 2023 IPC-E-23-11 Brisbie - Block 2 Billing Demand Exhibit No. 51 Case No. IPC-E-23-11 P. Goralski IPC Page 6 of 8 OATT + Ancillary Services OATT Transmission Demand Charge 2.6183 $/kw month August 26, 2022 OATT Final Informational Filing (FERC) for rates effective Oct 1, 2022 thru Sept 30, 2023 Ancillary Services Scheduling System Control & Dispatch 0 OATT Schedule 1 (Included in Transmission Demand Charge) Reactive Supply & Voltage Control 0 OATT Schedule 2 (Included in Transmission Demand Charge) Regulation and Frequency Response 0.0980 $/kw month OATT Schedule 3 ($6.53 x 1.5%) Operating Reserve - Spinning 0.1959 $/kw month OATT Schedule 5 ($6.53 x (1.5% + 1.5%)) Operating Reserve - Supplemental 0.1959 $/kw month OATT Schedule 6 ($6.53 x (1.5% + 1.5%)) TOTAL 3.11 $/kw month OATT Transmission Demand Charge - Firm Point-To-Point Transmission Services Provided Under Schedule 7: https://www.oasis.oati.com/woa/docs/IPCO/IPCOdocs/Effective_Rate_2022-08-26.xlsx Schedule 3, 5, 6: https://www.oasis.oati.com/woa/docs/IPCO/IPCOdocs/IPC_OATT_Issued_2023-01-27.pdf Idaho Power Company SOURCE Derivation of Contract Demand Charge IPC-E-23-11 Filed June 1, 2023 Calculation of Proposed Rates State of Idaho Exhibit No. 51 Case No. IPC-E-23-11 P. Goralski IPC Page 7 of 8 CONTRACT DEMAND CHARGE $3.11 Contract Demand ---> 10,000 1,000 <--- Incremental MW above Contract Demand 1 <--- Number of months for recover (Contract MW)(Incremental MW) Contract Demand Revenue $373,200 $410,520 Difference $37,320 $1.244 DAILY EXCESS DEMAND CHARGE $1.244 Contract Demand Revenue Idaho Power Company Derivation of Daily Excess Demand Charge IPC-E-23-11 Filed June 1, 2023 Calculation of Proposed Rates State of Idaho Exhibit No. 51 Case No. IPC-E-23-11 P. Goralski IPC Page 8 of 8 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION CASE NO. IPC-E-23-11 IDAHO POWER COMPANY GORALSKI, DI TESTIMONY EXHIBIT NO. 52 Memorandum Date: 2/16/2023 From: Yao Yin, Utilities Analyst, Idaho Public Utilities Commission To: Connie Aschenbrenner, Idaho Power Company Subject: Investigation in Methods to determine Marginal Cost of Energy for Schedule 20. Background Order No. 35428 directed Idaho Power to evaluate and compare other methods for determining a marginal cost of energy in addition to the use of Avoided Cost Averages in the Integrated Resource Plan for setting the Schedule 20 energy rate, before the next general rate case is developed and filed. On January 31, 2013, Idaho Power met with Staff and discussed potential methods for determining marginal cost of energy for the Schedule 20 energy rate and possibly for other customers using marginal cost of energy for their energy rates. As a result of the meeting, Staff agreed to develop some criteria for the Company to consider for developing a method. Criteria Although this list may not be exhaustive, Staff identified the following criteria that could be used for determining the final method: x The resources used in a model for determining marginal cost should be based on the resources that are highly likely to exist during the rate period. x The amount of incremental load used to determine the marginal cost rate should reflect the amount of incremental load for the portion of load that will be priced at marginal cost. x The marginal cost rates should have enough granularity to reflect time difference (e.g. seasonality, time of day) value of Marginal Cost within the Company’s system to provide accurate price signals. x If the marginal cost rates are based on a forecast, due to the lack of Marginal Costs being trued-up in the PCA, they should be updated often enough that they reflect current conditions or find a way to true up the marginal cost to actual marginal cost. x If market costs are used, cost of transmission transaction and wheeling costs should be included. Exhibit No. 52 Case No. IPC-E-23-11 P. Goralski, IPC Page 1 of 1