20200511PAC to PIIC 1-8.pdf

1407 W North Temple, Suite 330 Salt Lake City, Utah 84116 May 11, 2020 Ronald L. Williams, ISB No. 3034
Williams Bradbury, P.C.
P.O. Box 388 Boise ID, 83701 [e-mail] (C)
RE: ID 2020 ECAM
PIIC 1st Set Data Request (1-8) Please find enclosed Rocky Mountain Power’s Responses to PIIC 1-8. Also provided is Attachment PIIC 7. Provided via encryption are Confidential Attachments PIIC 3 and 5.

Confidential information is provided subject to the non-disclosure agreement (NDA) between the Company and Idaho Public Utilities Commission staff. If you have any questions, please feel free to call me at [phone].

Sincerely, ____/s/____
J. Ted Weston
Manager, Regulation Enclosures C.c.: Diane Hanian/IPUC [e-mail] (C)
Brad Iverson-Long/IPUC [e-mail] (C)
Brad Mullins/PIIC [e-mail] (C) Brian C. Collins/Monsanto [e-mail] Maurice Brubaker/Monsanto [e-mail] Randall C. Budge/Monsanto [e-mail]
Thomas J. Budge/Monsanto [e-mail]

RECEIVED
2020 May 11PM3:23
IDAHO PUBLIC
UTILITIES COMMISSION
PAC-E-20-02 / Rocky Mountain Power May 11, 2020
PIIC 1st Set Data Request 1 PIIC Data Request 1 Please provide all work papers and filing requirements associated with
PacifiCorp’s filing in Excel format with all formulas and links intact. Response to PIIC Data Request 1 Work papers were sent on May 5, 2020.
Record holder: Kaley McNay Sponsor: N/A

PAC-E-20-02 / Rocky Mountain Power May 11, 2020
PIIC 1st Set Data Request 2 PIIC Data Request 2 Please provide hourly electric market prices in the deferral period (January 1,
2019 – December 31, 2019) for the Palo Verde, Four-Corners, Mid-Columbia, Mead, and California Oregon Border hubs. Response to PIIC Data Request 2
The Company did not subscribe to any hourly market price services during the calendar year 2019. Record holder: John Fritz
Sponsor: Dave Webb
PAC-E-20-02 / Rocky Mountain Power May 11, 2020
PIIC 1st Set Data Request 3 PIIC Data Request 3 Please provide hourly generation logs and capacity factors for each owned wind
production facility in the deferral period. Response to PIIC Data Request 3 Please refer to Confidential Attachment PIIC 3 which provides PacifiCorp’s
actual hourly generation logs for PacifiCorp-owned wind resources, and calculated capacity factors. Confidential information is provided subject to the non-disclosure agreement between the Company and PacifiCorp Idaho Industrial Customers in this case.
Record holder: Cato Wagner III / Laine Anderson Sponsor: Dave Webb

PAC-E-20-02 / Rocky Mountain Power May 11, 2020
PIIC 1st Set Data Request 4 PIIC Data Request 4 Please provide monthly diurnal P50 capacity factors for each wind plant
repowered, or taken out of service to conduct repowering activities, in the deferral period. Response to PIIC Data Request 4 The Company has not performed the requested calculation. Record holder: Dan MacNeil
Sponsor: Dave Webb
PAC-E-20-02 / Rocky Mountain Power May 11, 2020
PIIC 1st Set Data Request 5 PIIC Data Request 5 For each wind plant that was repowered or taken out of service to conduct
repowering activities in the deferral period, please state the date the wind plant was taken out of service and the date that it returned to service. If only part of a plant was removed from service, please provide a schedule identifying the nameplate capacity out of service by date.
Response to PIIC Data Request 5 All the turbines at a wind plant were not shut down on one date for repowering. Depending on the turbine manufacturer at a wind plant, part of a plant was removed from service by turbine or by circuit for repowering activity. For wind
plants with General Electric (GE) turbines, individual turbines were shut down in a sequence for repowering activities and then brought back online. For wind plants with Vestas turbines, individual turbine circuits (that would have multiple turbines tied to it) were shut down in a sequence for repowering activities and then brought back online. Please refer to Confidential Attachment PIIC 5 which
contains a schedule identifying the nameplate capacity out of service by date on a turbine basis for GE wind plants and on a circuit basis for Vestas wind plants. Confidential information is provided subject to the non-disclosure agreement between the Company and PacifiCorp Idaho Industrial Customers in this case.
Record holder: Tim Hemstreet
Sponsor: Dave Webb

PAC-E-20-02 / Rocky Mountain Power May 11, 2020
PIIC 1st Set Data Request 6 PIIC Data Request 6 Please provide PacifiCorp’s best estimate of the cost of acquiring replacement
power associated with each wind plant that was taken out of service for repowering activities in the deferral period. Response to PIIC Data Request 6
The requested information is not available. The Company does not track megawatt-hours (MWh) not produced by its wind generation resources. Record holder: Jack Painter
Sponsor: Dave Webb
PAC-E-20-02 / Rocky Mountain Power May 11, 2020
PIIC 1st Set Data Request 7 PIIC Data Request 7 Please identify all test energy that PacifiCorp recorded in the deferral period by
resource and by month. Please also provide an explanation of how the identified test energy impacts actual net power costs. Response to PIIC Data Request 7
Test energy is an increase to net power costs (NPC) because it reduces short-term firm (STF) sales. Please refer to Attachment PIIC 7 for test energy megawatt-hours (MWh) and dollars.
Record holder: Cato Wagner, III / Jack Painter Sponsor: Dave Webb
PAC-E-20-02 / Rocky Mountain Power May 11, 2020
PIIC 1st Set Data Request 8 PIIC Data Request 8 In the Stipulation in Case No. PAC-E-17-06, “[t]he Parties requested that the
Commission approve the Company's proposed ratemaking treatment for recovery of the replaced assets, new investment, incremental energy production, and production tax credits (PTC) associated with the wind repowering project.” In its request for binding rate making treatment, did PacifiCorp consider and identify the cost of acquiring replacement power during repowering activities? If yes,
please identify where in testimony the cost of acquiring replacement power was identified. Response to PIIC Data Request 8
Reduced wind generation as a result of repowering was included in the economic analysis of the wind repowering projects. The costs of meeting system balancing needs, which may include the cost of replacement power and the re-dispatch of thermal resources, was assessed in the System Optimizer model (SO model) and the Planning and Risk (PaR) model based on the estimated wind generation
leading up to and during the repowering construction period. The SO model was allowed to select resources, including front office transactions (FOT) and demand-side management (DSM) programs that would also be available to cover reduced wind generation. The impacts of lost generation during repower were reduced to minimal levels by staging the installation of new turbines and by
construction occurring during the low wind season. Record holder: Tim Hemstreet

Sponsor: Dave Webb