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HomeMy WebLinkAbout20170501Final Approved Tariffs.pdfEXECUTIVE OFFICES INTERMOUNTAIN GAS COMPANY 555 SOUTH COLE ROAD • P.O. BOX 7608 • BOISE, IDAHO 83707 • (208) 377-6000 • FAX: 377-6097 May 1, 2017 Diane Hanian Idaho Public Utilities Commission 472 W. Washington St. P.0. Box 83720Boise, ID 83720-0074 RE: INT-G-16-02 -General Rate Case -Compliance Filing Dear Ms. Hanian: The following tariff sheets are enclosed for electronic filing with the Commission in compliance with the Commission's Order No. 33757 in Case No. INT-G-16-02. Fifty-First Revised Sheet No. 01 Deleted Fiftv-First Revised Sheet No. 02 Deleted Original Sheet No. 1 (RS) Fifty-Fourth Revised Sheet No.3 Cancelling Fifty-Third Revised Sheet No. 3 Eleventh Revised Sheet No. 4 Cancellina Tenth Revised Sheet No. 4 Eleventh Revised Sheet No. 5 Cancelling Tenth Revised Sheet No. 5 Sixtv-Second Revised Sheet No. 7. Paae 1 Cancellina Sixtv-First Revised Sheet No. 7, Paae 1 Fourth Revised Sheet No. 7, Page 2 Cancelling Third Revised Sheet No. 7, Paae 2 Thirteenth Revised Sheet No. 8 Cancellina Twelfth Revised Sheet No. 8 Twelfth Revised Sheet No. 9, Page 1 Cancelling Eleventh Revised Sheet No. 9, Paae 1 Third Revised Sheet No. 9, Page 2 Cancellina Second Revised Sheet No. 9, Paoe 2 Tenth Revised Sheet No. 10 Deleted The Base Rate Revenue Requirement found in Order No. 33757, Attachment A is listed by Rate Class on Workpaper No. 1. Workpaper No. 2 uses this same Base Rate Revenue Requirement to calculate per therm base rates for each of lntermountain's customer classes. Subsequent to the filing of the General Rate Case, the rates related to lntermountain's annual Purchased Gas Cost Adjustment were approved (Case INT-G-16-03, Order No. 33604). The tariffs reflect the Cost of Gas (RS, GS-1, IS and LV-1) and Temporary Purchased Gas Cost Adjustment (T-3 and T-4) approved by the Commission in that case. For the new RS and T-4 tariffs, the Cost of Gas and Temporary Purchased Gas Cost Adjustment respectively, were calculated by combining the previous RS-1/RS-2 classes and the T-4/T-5 classes as illustrated in Workpaper No. 3. The tariff sheets reflect an effective date of May 1, 2017in compliance with Order No. 33757. All Workpapers have been provided electronically. If you have any questions or require additional information regarding this filing, please contact me at (208) 377-6168. Enclosures cc Scott Madison Mark Chiles RECEIVED 2017 May 1 PM 12:11 IDAHO PUBLIC UTILITIES COMMISSION I.P.U.C. Gas Tariff Rate Schedules Original Sheet No. 1 (Page 1 of 1) Name Intermountain Gas Company Issued by: Intermountain Gas Company By: Michael P. McGrath Title: Director – Regulatory Affairs Effective: May 1, 2017 Rate Schedule RS RESIDENTIAL SERVICE APPLICABILITY: Applicable to any customer using natural gas for residential purposes. RATE: Monthly minimum charge is the Customer Charge. Customer Charge: $5.50 per bill Per Therm Charge: $0.63490* *Includes the following: Cost of Gas: 1)Temporary purchased gas cost adjustment ($0.04367) 2) Weighted average cost of gas $0.29695 3)Gas transportation cost $0.21161 Distribution Cost: $0.17001 PURCHASED GAS COST ADJUSTMENT: This tariff is subject to an adjustment for cost of purchased gas as provided for in the Company's Purchased Gas Cost Adjustment Schedule. SERVICE CONDITIONS: All natural gas service hereunder is subject to the General Service Provisions of the Company's Tariff, of which this rate schedule is a part. IDAHO PUBLIC UTILITIES COMMISSION Approved Effective May 1, 2017 May 1, 2017 Per O.N. 33757 Diane M. Hanian Secretary I.P.U.C. Gas Tariff Rate Schedules Fifty-Fourth Revised Sheet No. 3 (Page 1 of 2) Name Intermountain Gas Company Issued by: Intermountain Gas Company By: Michael P. McGrath Title: Director – Regulatory Affairs Effective: May 1, 2017 Rate Schedule GS-1 GENERAL SERVICE APPLICABILITY: Applicable to customers whose requirements for natural gas do not exceed 2,000 therms per day, at any point on the Company's distribution system. Requirements in excess of 2,000 therms per day may be served under this rate schedule upon execution of a one-year written service contract. RATE: Monthly minimum charge is the Customer Charge. Customer Charge: $9.50 per bill Per Therm Charge: Block One: First 200 therms per bill @ $0.65075* Block Two: Next 1,800 therms per bill @ $0.62660* Block Three: Next 8,000 therms per bill @ $0.60331* Block Four: Over 10,000 therms per bill @ $0.53596* *Includes the following: Cost of Gas: 1) Temporary purchased gas cost adjustment ($0.05144) 2) Weighted average cost of gas $0.29695 3) Gas transportation cost $0.21545 Distribution Cost: Block One: First 200 therms per bill @ $0.18979 Block Two: Next 1,800 therms per bill @ $0.16564 Block Three: Next 8,000 therms per bill @ $0.14235 Block Four: Over 10,000 therms per bill @ $0.07500 IDAHO PUBLIC UTILITIES COMMISSION Approved Effective May 1, 2017 May 1, 2017 Per O.N. 33757 Diane M. Hanian Secretary I.P.U.C. Gas Tariff Rate Schedules Fifty-Fourth Revised Sheet No. 3 (Page 2 of 2) Name Intermountain Gas Company Issued by: Intermountain Gas Company By: Michael P. McGrath Title: Director – Regulatory Affairs Effective: May 1, 2017 Rate Schedule GS-1 GENERAL SERVICE (Continued) For separately metered deliveries of gas utilized solely as Compressed Natural Gas Fuel in vehicular internal combustion engines. Customer Charge: $9.50 per bill Per Therm Charge: Block One: First 10,000 therms per bill @ $0.60331* Block Two: Over 10,000 therms per bill @ $0.53596* *Includes the following: Cost of Gas: 1) Temporary purchased gas cost adjustment ($0.05144) 2) Weighted average cost of gas $0.29695 3) Gas transportation cost $0.21545 Distribution Cost: Block One: First 10,000 therms per bill @ $0.14235 Block Two: Over 10,000 therms per bill @ $0.07500 PURCHASED GAS COST ADJUSTMENT: This tariff is subject to an adjustment for cost of purchased gas as provided for in the Company's Purchased Gas Cost Adjustment Schedule. SERVICE CONDITIONS: 1. All natural gas service hereunder is subject to the General Service Provisions of the Company's Tariff, of which this rate schedule is a part. BILLING ADJUSTMENTS: 1. Any GS-1 customer who leaves the GS-1 service will pay to Intermountain Gas Company, upon exiting the GS-1 service, all gas and transportation related costs incurred to serve the customer during the GS- 1 service period not paid by the customer during the time the customer was using GS-1 service. Any GS-1 customer who leaves the GS-1 service will have refunded to them, upon exiting the GS-1 service, any excess gas commodity or transportation payments made by the customer during the time they were a GS-1 customer. IDAHO PUBLIC UTILITIES COMMISSION Approved Effective May 1, 2017 May 1, 2017 Per O.N. 33757 Diane M. Hanian Secretary I.P.U.C. Gas Tariff Rate Schedules Eleventh Revised Sheet No. 4 (Page 1 of 2) Name Intermountain Gas Company Issued by: Intermountain Gas Company By: Michael P. McGrath Title: Director – Regulatory Affairs Effective: May 1, 2017 Rate Schedule IS-R RESIDENTIAL INTERRUPTIBLE SNOWMELT SERVICE APPLICABILITY: Applicable to any residential customer otherwise eligible to receive service under Rate Schedule RS who has added natural gas snowmelt equipment after 6/1/2010. The intended use of the snowmelt equipment is to melt snow and/or ice on sidewalks, driveways or any other similar appurtenances. Any and all such applications meeting the above criteria will be subject to service under Rate Schedule IS-R and will be separately and individually metered. All service hereunder is interruptible at the sole discretion of the Company. FACILITY REIMBURSEMENT CHARGE: All new interruptible Snowmelt service customers are required to pay for the cost of the Snowmelt meter set and other related facility and equipment costs, prior to the installation of the meter set. Any request to alter the physical location of the meter set and related facilities from Company’s initial design may be granted provided, however, the Company can reasonably accommodate said relocation and Customer agrees to pay all related costs. RATE: Monthly minimum charge is the Customer Charge. Customer Charge: $5.50 per bill Per Therm Charge: $0.63490* *Includes the following: Cost of Gas: 1)Temporary purchased gas cost adjustment ($0.04367) 2)Weighted average cost of gas $0.29695 3)Gas transportation cost $0.21161 Distribution Cost: $0.17001 PURCHASED GAS COST ADJUSTMENT: This tariff is subject to an adjustment for cost of purchased gas as provided for in the Company's Purchased Gas Cost Adjustment Schedule. IDAHO PUBLIC UTILITIES COMMISSION Approved Effective May 1, 2017 May 1, 2017 Per O.N. 33757 Diane M. Hanian Secretary I.P.U.C. Gas Tariff Rate Schedules Eleventh Revised Sheet No. 5 (Page 1 of 2) Name Intermountain Gas Company Issued by: Intermountain Gas Company By: Michael P. McGrath Title: Director – Regulatory Affairs Effective: May 1, 2017 Rate Schedule IS-C SMALL COMMERICAL INTERRUPTIBLE SNOWMELT SERVICE APPLICABILITY: Applicable to any customer otherwise eligible to receive gas service under Rate Schedule GS-1 who has added natural gas snowmelt equipment after 6/1/2010. The intended use of the snowmelt equipment is to melt snow and/or ice on sidewalks, driveways or any other similar appurtenances. Any and all such applications meeting the above criteria will be subject to service under Rate Schedule IS-C and will be separately and individually metered. All service hereunder is interruptible at the sole discretion of the Company. FACILITY REIMBURSEMENT CHARGE: All new interruptible Snowmelt service customers are required to pay for the cost of the Snowmelt meter set and other related facility and equipment costs, prior to the installation of the meter set. Any request to alter the physical location of the meter set and related facilities from Company’s initial design may be granted provided, however, the Company can reasonably accommodate said relocation and Customer agrees to pay all related costs. RATE: Monthly minimum charge is the Customer Charge. Customer Charge: $9.50 per bill Per Therm Charge: Block One: First 200 therms per bill @ $0.65075* Block Two: Next 1,800 therms per bill @ $0.62660* Block Three: Next 8,000 therms per bill @ $0.60331* Block Four: Over 10,000 therms per bill @ $0.53596* *Includes the following: Cost of Gas: 1)Temporary purchased gas cost adjustment ($0.05144) 2)Weighted average cost of gas $0.29695 3)Gas transportation cost $0.21545 Distribution Charge: Block One: First 200 therms per bill @ $0.18979 Block Two: Next 1,800 therms per bill @ $0.16564 Block Three: Next 8,000 therms per bill @ $0.14235 Block Four: Over 10,000 therms per bill @ $0.07500 IDAHO PUBLIC UTILITIES COMMISSION Approved Effective May 1, 2017 May 1, 2017 Per O.N. 33757 Diane M. Hanian Secretary I.P.U.C. Gas Tariff Rate Schedules Sixty-Second Revised Sheet No. 7 (Page 1 of 2) Name Intermountain Gas Company Issued by: Intermountain Gas Company By: Michael P. McGrath Title: Director – Regulatory Affairs Effective: May 1, 2017 Rate Schedule LV-1 LARGE VOLUME FIRM SALES SERVICE AVAILABILITY: Available at any mutually agreeable delivery point on the Company's distribution system to any existing customer receiving service under the Company’s rate schedule LV-1 or any customer not previously served under this schedule whose usage does not exceed 500,000 therms annually, upon execution of a one-year minimum written service contract for firm sales service in excess of 200,000 therms per year. MONTHLY RATE: Demand Charge: $0.30000 per MDFQ therm Per Therm Charge: Block One: First 250,000 therms per bill @ $0.37413* Block Two: Next 500,000 therms per bill @ $0.35567* Block Three: Over 750,000 therms per bill @ $0.29300* *Includes the following: Cost of Gas: 1) Temporary purchased gas cost adjustment Block One and Two ($0.02443) Block Three ($0.00712) 2) Weighted average cost of gas $0.29695 3) Gas transportation cost (Block One and Two only) $0.07065 Distribution Cost: Block One: First 250,000 therms per bill @ $0.03096 Block Two: Next 500,000 therms per bill @ $0.01250 Block Three: Over 750,000 therms per bill @ $0.00317 PURCHASED GAS COST ADJUSTMENT: This tariff is subject to an adjustment for cost of purchased gas as provided for in the Company's Purchased Gas Cost Adjustment Schedule. SERVICE CONDITIONS: 1. All natural gas service hereunder is subject to the General Service Provisions of the Company's Tariff, of which this Rate Schedule is a part. 2. The customer shall negotiate with the Company, a mutually agreeable Maximum Daily Firm Quantity (MDFQ) amount, which will be stated in and will be in effect throughout the term of the service contract. In the event the Customer requires daily usage in excess of the MDFQ, and subject to the availability of firm interstate transportation to serve Intermountain's system, all such excess usage will be billed under rate schedule LV-1. Additionally, all excess MDFQ above the customer’s contracted MDFQ for the month will be billed at the monthly Demand Charge rate. IDAHO PUBLIC UTILITIES COMMISSION Approved Effective May 1, 2017 May 1, 2017 Per O.N. 33757 Diane M. Hanian Secretary I.P.U.C. Gas Tariff Rate Schedules Fourth Revised Sheet No. 7 (Page 2 of 2) Name Intermountain Gas Company Issued by: Intermountain Gas Company By: Michael P. McGrath Title: Director – Regulatory Affairs Effective: May 1, 2017 Rate Schedule LV-1 LARGE VOLUME FIRM SALES SERVICE (Continued) 3. The monthly demand charge will be equal to the MDFQ times the demand charge rate. Demand charge relief will be afforded to those LV-1 customers when circumstances impacted by force majeure events prevent the Company from delivering natural gas to the customer’s meter. 4. Embedded in this service is the cost of purchased gas per the Company's PGA, firm interstate pipeline reservation charges, and distribution system costs. BILLING ADJUSTMENTS: 1. Any LV-1 customer who exits the LV-1 service will pay to Intermountain Gas Company, upon exiting the LV-1 service, all Purchased Gas Cost (“PGA”) related costs incurred on the customer’s behalf not paid by the customer during the LV-1 contract period. Any LV-1 customer who has exited the LV-1 service will have refunded to them, upon exiting the LV-1 service, any PGA related credits attributable to the customer during the said contract period. 2. In the event that total deliveries to any existing customer within the most recent three contract periods met or exceeded the 200,000 therm threshold, but the customer during the current contract period used less than the contract minimum of 200,000 therms, an additional amount shall be billed. The additional amount shall be calculated by billing the deficit usage below 200,000 therms at the LV-1 Block 1 rate adjusted for the removal of variable gas costs. The customer’s future eligibility for the LV-1 Rate Schedule will be renegotiated with the Company. In the event that total deliveries to any new customer did not meet the 200,000 therm threshold during the current contract period, an additional amount shall be billed. The additional amount shall be calculated by billing the customer's total usage during that contract period at the Rate Schedule GS-1 Block 3 rate, and then subtracting the amounts previously billed during the annual contract period. The customer's future eligibility for the LV-1 Rate Schedule will be renegotiated with the Company. IDAHO PUBLIC UTILITIES COMMISSION Approved Effective May 1, 2017 May 1, 2017 Per O.N. 33757 Diane M. Hanian Secretary I.P.U.C. Gas Tariff Rate Schedules Thirteenth Revised Sheet No. 8 (Page 1 of 2) Name Intermountain Gas Company Issued by: Intermountain Gas Company By: Michael P. McGrath Title: Director – Regulatory Affairs Effective: May 1, 2017 Rate Schedule T-3 INTERRUPTIBLE DISTRIBUTION TRANSPORTATION SERVICE AVAILABILITY: Available at any point on the Company's distribution system to any customer upon execution of a one year minimum written service contract. MONTHLY RATE: Per Therm Charge: Block One: First 100,000 therms transported @ $0.04250* Block Two: Next 50,000 therms transported @ $0.01673* Block Three: Over 150,000 therms transported @ $0.00556* *Includes temporary purchased gas cost adjustment of $(0.00097) ANNUAL MINIMUM BILL: The customer shall be subject to the payment of an annual minimum bill of $30,000 during each annual contract period, unless a higher minimum is required under the service contract to cover special conditions. PURCHASED GAS COST ADJUSTMENT: This tariff is subject to an adjustment for cost of purchased gas as provided for in the Company's Purchased Gas Cost Adjustment Schedule. SERVICE CONDITIONS: 1.The Company, in its sole discretion, shall determine whether or not it has adequate capacity toaccommodate transportation of the customer's gas supply on the Company's distribution system. 2.All natural gas service hereunder is subject to the General Service Provisions of the Company's Tariff, of which this Rate Schedule is a part. 3.Interruptible Distribution Transportation Service may be made firm by a written agreement betweenthe parties if the customer has a dedicated line. 4.If requested by the Company, the customer expressly agrees to immediately curtail or interrupt its operations during periods of capacity constraints on the Company’s distribution system. 5.This service does not include the cost of the customer's gas supply or the interstate pipeline capacity. The customer is responsible for procuring its own supply of natural gas and transportation to Intermountain's distribution system under this rate. 6.The customer understands and agrees that the Company is not responsible to deliver gas supplies to the customer which have not been nominated and accepted for delivery by the interstate pipeline. 7.An existing T-4 customer electing this schedule may concurrently utilize Rate Schedule T-3 on the same or contiguous property. IDAHO PUBLIC UTILITIES COMMISSION Approved Effective May 1, 2017 May 1, 2017 Per O.N. 33757 Diane M. Hanian Secretary I.P.U.C. Gas Tariff Rate Schedules Twelfth Revised Sheet No. 9 (Page 1 of 2) Name Intermountain Gas Company Issued by: Intermountain Gas Company By: Michael P. McGrath Title: Director – Regulatory Affairs Effective: May 1, 2017 Rate Schedule T-4 FIRM DISTRIBUTION ONLY TRANSPORTATION SERVICE AVAILABILITY: Available at any mutually agreeable delivery point on the Company's distribution system to any customer upon execution of a one year minimum written service contract for firm distribution transportation service in excess of 200,000 therms per year. MONTHLY RATE: Demand Charge: $0.29881 per MDFQ therm* Per Therm Charge: Block One: First 250,000 therms transported @ $0.03000 Block Two: Next 500,000 therms transported @ $0.01059 Block Three: Over 750,000 therms transported @ $0.00326 *Includes temporary purchased gas cost adjustment of $(0.00119) PURCHASED GAS COST ADJUSTMENT: This tariff is subject to an adjustment for cost of purchased gas as provided for in the Company's Purchased Gas Cost Adjustment Schedule. SERVICE CONDITIONS: 1. This service excludes the service and cost of firm interstate pipeline charges. 2. The customer is responsible for procuring its own supply of natural gas and interstate transportation under this Rate Schedule. The customer understands and agrees that the Company is not responsible to deliver gas supplies to the customer which have not been nominated, scheduled, and delivered by the interstate pipeline to the designated city gate. 3. All natural gas service hereunder is subject to the General Service Provisions of the Company’s Tariff, of which this Rate Schedule is a part. 4. The customer shall negotiate with the Company, a mutually agreeable Maximum Daily Firm Quantity (MDFQ), which will be stated in and in effect throughout the term of the service contract. 5. The monthly demand charge will be equal to the MDFQ times the demand charge rate. Demand charge relief will be afforded to those T-4 customers when circumstances impacted by force majeure events prevent the Company from delivering natural gas to the customer’s meter. 6. An existing LV-1 or T-3 customer electing this schedule may concurrently utilize Rate Schedule T-4 on the customer’s same or contiguous property. IDAHO PUBLIC UTILITIES COMMISSION Approved Effective May 1, 2017 May 1, 2017 Per O.N. 33757 Diane M. Hanian Secretary I.P.U.C. Gas Tariff Rate Schedules Third Revised Sheet No. 9 (Page 2 of 2) Name Intermountain Gas Company Issued by: Intermountain Gas Company By: Michael P. McGrath Title: Director – Regulatory Affairs Effective: May 1, 2017 Rate Schedule T-4 FIRM DISTRIBUTION ONLY TRANSPORTATION SERVICE (Continued) BILLING ADJUSTMENTS: 1. In the event that total deliveries to any existing T-4 customer within the most recent three contract periods met or exceeded the 200,000 therm threshold, but the customer during the current contract period used less than the contract minimum of 200,000 therms, an additional amount shall be billed. The additional amount shall be calculated by billing the deficit usage below 200,000 therms at the T- 4 Block 1 rate. The customer's future eligibility for the T-4 Rate Schedule will be renegotiated with the Company. In the event that total deliveries to any new T-4 customer did not meet the 200,000 therm threshold during the current contract period, an additional amount shall be billed. The additional amount shall be calculated by billing the customer's total usage during that contract period at the Rate Schedule GS-1 Block 3 rate, adjusted for the cost of gas, and then subtracting the amounts previously billed during the annual contract period. The customer's future eligibility for the T-4 Rate Schedule will be renegotiated with the Company. 2. Any T-4 customer who exits the T-4 service will pay to Intermountain Gas Company, upon exiting the T-4 service, all Purchased Gas Cost (“PGA”) related costs incurred on the customer’s behalf not paid by the customer during the T-4 contract period. Any T-4 customer who has exited the T-4 service will have refunded to them, upon exiting the T-4 service, any PGA related credits attributable to the customer during said contract period. 3. In the event the Customer requires daily usage in excess of the MDFQ, and subject to the availability of firm distribution capacity to serve Intermountain’s system, all such excess usage will be billed under rate schedule T-4. Additionally, all excess MDFQ above the customer’s contracted MDFQ for the month will be billed at the monthly Demand Charge rate. IDAHO PUBLIC UTILITIES COMMISSION Approved Effective May 1, 2017 May 1, 2017 Per O.N. 33757 Diane M. Hanian Secretary INTERMOUNTAIN GAS COMPANY Revenue Requirement INT-G-16-02, Order No. 33757, Attachment A Line Commission Revenue Requirement by 1 RS 170,589,416$ 113,318,143$ 57,271,273$ 2 GS 78,423,352 56,557,066 21,866,286 3 LV-1 2,775,142 2,444,453 330,689 4 T-3 532,754 (42,537) 575,291 5 T-4 8,760,876 (571,849) 9,332,725 6 Total 261,081,540$ 171,705,276$ 89,376,264$ (1) Line 2 Col(b) and Col (c) rounded by one to reach same total as order Workpaper No. 1INT-G-16-02 Compliance Filing Intermountain Gas Company Page 1 of 1 Intermountain Gas Company Price Calculation INT-G-16-02 Order No. 33757 Residential General Service Transport Line Description Rate Schedule Rate Schedule Rate Schedule (a)(b)(c)(d)(e)(f) 1 B. Billing Determinants2Customer Bill Count 3 Customers 3,701,803 385,893 4,087,696 4 Billing Demand 450,360 15,321,300 15,771,660 5 FINAL BASE REVENUE TARGET $57,271,273 $21,866,286 $330,689 $575,291 $9,332,725 $89,376,264 6 D. RATE DESIGN 7 Approved Customer Charge $5.50 $9.50 Commission Order No. 33757 8 Customer Revenues $20,359,917 $3,665,984 $24,025,900 9 Demand-Related Billing Units10Billing Demand Contract Demand, Therms 450,360 15,321,300 15,771,66011Approved Demand-Related Charges12Approved Demand Charge $0.30000 $0.30000 Commission Order No. 3375713Demand Revenues at Approved Rates $135,108 $4,596,390 $4,731,49814Remaining Revenues $36,911,357 $18,200,303 $195,581 $575,291 $4,736,335 $60,618,86615Volumetric Revenue Target $36,911,357 $18,200,303 $195,581 $575,291 $4,736,335 $60,618,866 16 Current Volumetric Charge ($/Therm) - Summer $0.31678 17 Current Volumetric Charge ($/Therm) - Winter $0.2042218Current Volumetric Charge ($/Therm) - Summer $0.19600 19 Current Volumetric Charge ($/Therm) - Winter $0.1623720Current Volumetric Charge ($/Therm) - Summer Block 1 $0.21751 $0.06456 $0.05560 $0.05983 21 Current Volumetric Charge ($/Therm) - Summer Block 2 $0.19578 $0.02607 $0.02300 $0.0213422Current Volumetric Charge ($/Therm) - Summer Block 3 $0.17476 $0.00661 $0.00887 $0.00661 23 Current Volumetric Charge ($/Therm) - Winter Block 1 $0.16666 $0.06456 $0.05560 $0.0598324Current Volumetric Charge ($/Therm) - Winter Block 2 $0.14546 $0.02607 $0.02300 $0.02134 25 Current Volumetric Charge ($/Therm) - Winter Block 3 $0.12500 $0.00661 $0.00887 $0.0066126Current Volumetric Charges (per Therm) Commodity Rate $0.00246 27 Current Volumetric Charges (per Therm) Overrun $0.04505 *Order Attachment A, Line 5 did not accept the Company 28 Approved Rate Blocks: Upper Limit (Therms per Month)L&U adjustment so these rates are different than the 29 Company's original Ex 24. 30 Distribution Quantity31Distribution Quantity Block 1 200 250000 100000 25000032Distribution Quantity Block 2 2000 750000 150000 75000033Distribution Quantity Block 3 10000 999999999 999999999 99999999934Distribution Quantity Block 4 999999999 999999999 999999999 99999999935Proposed Volumetric Billing Units (Therms) 37 Distribution Quantity 217,113,369 38 Distribution Quantity Block 1 31,791,087 6,317,560 7,613,251 115,948,33239Distribution Quantity Block 2 52,606,409 3,000,000 96,712,653 40 Distribution Quantity Block 3 22,155,219 29,296,036 71,751,84741Distribution Quantity Block 4 3,987,982 43 44 Proposed Volumetric Charges per therm45Proposed Volumetric Charge $0.1700146Proposed Volumetric Charge Block 1 $0.18979 $0.03096 $0.04347 $0.0300047Proposed Volumetric Charge Block 2 $0.16564 $0.01250 $0.01770 $0.0105948Proposed Volumetric Charge Block 3 $0.14235 $0.00317 $0.00653 $0.00326 Workpaper No. 2INT-G-16-02 Compliance Filing Intermountain Gas Company Page 1 of 2 Intermountain Gas Company Price Calculation INT-G-16-02 Order No. 33757 Residential General Service Transport Line Description Rate Schedule Rate Schedule Rate Schedule Base Rates Revenue Proof51Proposed Customer Charge Revenues52Total Customer Charge Revenues $20,359,917 $3,665,984 $24,025,90053Proposed Demand-Related Revenues 55 Proposed Volumetric Revenues56Proposed Volumetric Charge $36,911,444 $36,911,44457Proposed Volumetric Charge Block 1 $6,033,630 $195,592 $330,948 $3,478,450 $10,038,62058Proposed Volumetric Charge Block 2 $8,713,726 $0 $53,100 $1,024,187 $9,791,01359Proposed Volumetric Charge Block 3 $3,153,795 $0 $191,303 $233,911 $3,579,01060Proposed Volumetric Charge Block 4 $299,099 $0 $0 $0 $299,09961Total Volumetric Revenues $36,911,444 $18,200,250 $195,592 $575,351 $4,736,548 $60,619,185 Σ Lines 56 to 6062Total Proposed Revenues Σ Lines 52, 54, 61 Workpaper No. 2 INT-G-16-02 Compliance Filing Intermountain Gas Company Page 2 of 2 INTERMOUNTAIN GAS COMPANY Combined RS-1 and RS-2 Cost of Gas Approved in PGA Case INT-G-16-03 Line No.Description Total RS-1 RS-2 (a)(b)(c)(d) Calculation of Combined Temporary 1 Management of Pipeline Transportation Capacity (Exhibit 7, Line 3)(2,614,982)$ (447,628)$ (2,167,354)$ 2 Fixed Costs (Exhibit 8, Line 7)(4,289,995) (577,168) (3,712,827) 3 LNG Sales Credits (Exhibit 10, Line 5)(117,526) (20,118) - (97,408) 4 Subtotal Temporaries (7,022,503)$ (1,044,914)$ (5,977,589)$ 5 Normalized PGA Sales Volumes (Ex 4, Line 24)206,430,274 31,758,444 174,671,830 6 Per Therm Temporary (0.03402) (0.03289) (0.03423) 7 Add Variable Temporary (Exhibit 9, Line 4)(0.00595) (0.00595) (0.00595) 8 Add L&U Temporary (Exhibit 9, Line 12)(0.00370) (0.00370) (0.00370) 9 Total Temporary (0.04367)$ (0.04254)$ (0.04388)$ Calculation of Combined Fixed Cost Collection Rate 10 Incremental Fixed Cost Collection (Ex 4, Lines 1-20)(105,940)$ (18,136)$ (87,804)$ 11 Normalized PGA Sales Volumes (Ex 4, Line 24)206,430,274 31,758,444 174,671,830 12 Total Incremental Fixed Cost Collection (0.00051)$ (0.00057)$ (0.00050)$ 13 Fixed Gas Cost Charges (Exhibit 5, Line 21)45,241,212$ 7,744,299$ 37,496,913$ 14 Estimated PGA Sales Volumes (Ex 5, Line 22)213,282,692 31,701,705 181,580,987 15 Total Fixed Gas Cost Charges Per Therm 0.21212$ 0.24429$ 0.20650$ 16 Total Fixed Costs Collected (Line 12 plus Line 15)0.21161$ 0.24372$ 0.20600$ Calculation of RS Price 17 WACOG (Exhibit 4, Line 22)0.29695$ 0.29695$ 0.29695$ 18 Total Cost of Gas (Sum of lines 9, 16, and 17)0.46489$ 0.49813$ 0.45907$ 19 Distribution Cost per Order No. 33757 0.17001 20 Total RS Price 0.63490$ Workpaper No. 3 INT-G-16-02 Compliance Filing Intermountain Gas Company Page 1 of 2 INTERMOUNTAIN GAS COMPANY Combined T-4 and T-5 Temporaries Approved in PGA Case INT-G-16-03 Line No.Description Total T-4 T-5 (a)(b)(c)(d) Calculation of Combined Temporary 1 LNG Sales Credits (Exhibit 10, Line 5)(59,725)$ (56,004)$ (3,721)$ 2 Normalized PGA Sales Volumes (Ex 10, Line 6)272,280,517 248,823,322 23,457,195 3 Per Therm Temporary (0.00022) (0.00023) (0.00016) 4 Add Variable Temporary (Exhibit 9, Line 20)(0.00097) (0.00097) (0.00097) 5 Total Temporary (0.00119)$ (0.00120)$ (0.00113)$ Calculation of T-4 Price 6 Demand Charge per Order No. 33757 0.30000$ 7 Total T-4 Price 0.29881$ Workpaper No. 3 INT-G-16-02 Compliance Filing Intermountain Gas Company Page 2 of 2