20230112PAC to Staff 18-19.pdf

1407 W North Temple, Suite 330 Salt Lake City, Utah 84116 January 12, 2023 Jan Noriyuki Idaho Public Utilities Commission
472 W. Washington Boise, ID 83702-5918 [e-mail] (C) RE: ID PAC-E-22-12
IPUC Set 3 (18-19)
Please find enclosed Rocky Mountain Power’s Responses to IPUC 3rd Set Data Requests 18-19. Also provided are Attachments IPUC 18 –(1-3), and 19-3. The Confidential Attachments IPUC 19 –(1, 3-4) are provided via BOX. Confidential information is provided subject to protection
under IDAPA 31.01.01.067 and 31.01.01.233, the Idaho Public Utilities Commission’s Rules of
Procedure No. 67 – Information Exempt from Public Review. If you have any questions, please feel free to call me at [phone].
Sincerely,
____/s/____ Mark Alder
Manager, Regulation
Enclosures
RECEIVED
Thursday, January 12, 2023 12:17:11 PM
IDAHO PUBLIC
UTILITIES COMMISSION
PAC-E-22-12 / Rocky Mountain Power January 12, 2023
IPUC Data Request 18
IPUC Data Request 18 Please provide work papers for the 2021 cost-effectiveness analysis results using
2019 IRP avoided costs for all Idaho Energy Efficiency offerings on the portfolio,
sector, program, and measure levels in Excel format with all formulas intact and enabled. Please provide summaries on the results of the analysis and a comparison of results with the 2021 cost effectiveness analysis using 2021 IRP avoided costs.
(a) Please account for Low-Income Weatherization Non-Energy Impacts (NEI)
values referenced in Production Request No. 16 and provide supporting calculations for the NEI values. Response to IPUC Data Request 18

Please refer to Attachment IPUC 18-1 and Attachment IPUC 18-2 which provides the work papers documenting the differences in cost effectiveness using 2021 Integrated Resource Plan (IRP) and 2019 IRP avoided costs. The tables tab in each attachment documents the results from each vintage of avoided cost. A high-
level comparison of results is detailed below. Generally, avoided costs increased
in 2021 relative to 2019 and therefore cost effectiveness decreases when relying on 2019 avoided costs. Table 3: Benefit/Cost Ratios by Portfolio Type - 2019 Avoided CostsProgramPTRCTRCUCT PCT RIMTotal Portfolio (Including NEBs)0.83 0.77 1.21 2.30 0.34Total Portfolio 0.75 0.68 1.21 2.21 0.34Commercial0.95 0.86 1.46 2.65 0.36Residential (Including NEBs)0.69 0.66 0.81 1.29 0.31Residential0.34 0.31 0.81 0.92 0.31
Table 3: Benefit/Cost Ratios by Portfolio Type - 2021 Avoided CostsProgramPTRCTRCUCT PCT RIMTotal Portfolio (Including NEBs)1.13 1.03 1.68 2.30 0.47Total Portfolio 1.05 0.95 1.68 2.21 0.47Commercial1.20 1.09 1.85 2.65 0.45Residential (Including NEBs)1.19 1.12 1.99 1.29 0.75Residential0.84 0.76 1.99 0.92 0.75

(a) The Company assumes that the reference to “Production Request No. 16” is
intended to be reference to IPUC Data Request 16. Based on the foregoing assumption, the Company responds as follows: The total non-energy impacts (NEI) value of $41,364 for low-income
weatherization program activity in 2021 is derived from the Company’s
technical reference library for measures, which assumes a per project NEI
PAC-E-22-12 / Rocky Mountain Power January 12, 2023
IPUC Data Request 18
value of $1,532. This per project value is derived from the net reduction in total arrearages and assistance payments found in the Company’s program year 2013-2015 low-income weatherization evaluation performed by Opinion
Dynamics, provided as Attachment IPUC 18.3. Table 11 of that evaluation
shows an annual payment assistance of benefit $1,328, and Table 12 shows a monthly arrearage reduction of $17. When annualized the total documented NEI impact per project was $1,532. This per project value was then multiplied by 27, which was the total number of whole home projects in 2021. Therefore,
the total NEI for 2021 was estimated to be $41,364 ($1,532 x 27 = $41,364).
Recordholder: Peter Schaffer
Sponsor: Clay Monroe
PAC-E-22-12 / Rocky Mountain Power January 12, 2023
IPUC Data Request 19
IPUC Data Request 19 Please respond to the following on the Irrigation Load Control (ILC) cost-
effectiveness calculations regarding the “Benefit of value of Dispatched kW (At
Gen)” referenced on sheet “ILC”, cell B6 in the 2020 cost-effectiveness work papers and sheet “ILC Report”, cell C8 in the 2021 cost-effectiveness work papers:
(a) Please provide work papers used to calculate the "Benefit of value of
Dispatched kW (At Gen)" for both 2020 and 2021; (b) Please provide a description (with sample calculations) of how the benefit value is calculated and used in the cost-effectiveness calculations; and

(c) Please explain if the "Benefit of value of Dispatched kW (At Gen)" is system or Idaho jurisdiction specific. Response to IPUC Data Request 19

Please refer to Confidential Attachment IPUC 19-1 and Confidential Attachment IPUC 19-2 which provide the cost effectiveness (CE) calculations. Note: Confidential Attachment IPUC 19-1 provides work papers supporting avoided cost for 2020, and Confidential Attachment IPUC 19-2 documents the avoided
cost valuation for 2021 in tab “Annual Results”.
In Confidential Attachment IPUC 19-1, the 2020 benefit includes a memo describing how the benefit is calculated. Additionally, the Company’s response to IPUC Data Request 26, as part of Case No. PAC-E-22-13, provides a summary of
valuation methodology used for the 2021 avoided cost. For ease of reference, the
Company is providing a copy of IPUC Data Request 26 from Case No. PAC-E-22-13 as Attachment IPUC 19-3 and Confidential Attachment IPUC 19-4. Generally, the avoided cost for Irrigation Load Control represents the avoided cost of energy, and capacity for generation, transmission and distribution provided
by demand response. The benefit is calculated on a kilowatt per year (kW/yr)
basis and applies volumes achieved in a given year. A sample equation representing the general calculation of avoided cost benefit is below for reference: 𝐷𝐷𝐷𝐷 𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 𝑝𝑝𝑉𝑉𝑝𝑝 𝑘𝑘𝑘𝑘/𝑦𝑦𝑝𝑝= Σ((𝐴𝐴𝐴𝐴 ℎ𝑜𝑜𝑉𝑉𝑝𝑝𝑜𝑜)+𝐴𝐴𝐴𝐴+𝑇𝑇&𝐷𝐷 )𝑉𝑉𝑜𝑜𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 (𝑘𝑘𝑘𝑘/𝑦𝑦𝑝𝑝)
Where: AE = Avoided energy costs for dispatched hours.

PAC-E-22-12 / Rocky Mountain Power January 12, 2023
IPUC Data Request 19
AC = Avoided generation capacity cost. T&D credits = transmission and distribution deferral cost credit. Similar to values
used for energy efficiency.
Volume (MW) = The total volume of resource over a year adjusted for hourly availability.
The benefit of value of dispatched “kW (At Gen)” relies on values that pertain to
Idaho’s jurisdiction. Confidential information is provided subject to protection under IDAPA 31.01.01.067 and 31.01.01.233, the Idaho Public Utilities Commission’s Rules of
Procedure No. 67 – Information Exempt from Public Review, and further subject
to the Protective Agreement executed in this proceeding. Recordholder: Peter Schaffer

Sponsor: Clay Monroe