20230414PAC to Staff 5.pdf

1407 W North Temple, Suite 330 Salt Lake City, Utah 84116
April 14, 2023 Jan Noriyuki Idaho Public Utilities Commission 472 W. Washington
Boise, ID 83702-5918 [e-mail] (C) RE: ID PAC-E-23-01
IPUC Set 1 (1-17) Please find enclosed Rocky Mountain Power’s 1st Supplemental Response to IPUC 1st Set Data Request 5. Provided via BOX is Non-Public Transmission Confidential Attachment IPUC 5 1st Supplemental. The attachment to this data request response is classified as non-public transmission confidential information. The contents of the attachment is prohibited from being
shared with PacifiCorp’s market affiliate personnel. The password for the attachment will be sent separately via e-mail to specific staff. Those same staff members will be shared a BOX link where they can access the password protected attachment. If you have any questions, please feel free to call me at [phone]. Sincerely,
____/s/____
Mark Alder Manager, Regulation Enclosures
RECEIVED
Friday, April 14, 2023 3:02:06 PM
IDAHO PUBLIC
UTILITIES COMMISSION
PAC-E-23-01 / Rocky Mountain Power April 14, 2023 IPUC Data Request 5 – 1st Supplemental
IPUC Data Request 5 Link Direct at 25 / 26 - Company Witness Link testifies that "In the absence of B2H, providing this level of central Oregon load service would require at least
725 MW of dispatchable generation in southern Oregon".
(a) Please explain why the Company expects loads to grow from 340 MW to 680 MW in central Oregon. Link Direct at 25;

(b) Please explain why this growth will require at least 725 MW of dispatchable generation; (c) Please provide the "non-wires analysis performed by BPA, IPC, and PacifiCorp" described in footnote 14 of this testimony. Link Direct at 25; and

(d) Please explain how the Company estimates the annual fixed costs of this resource to be $230 million in 2027. Link Direct at 26.
1st Supplemental Response to IPUC Data Request 5 IMPORTANT – the attachment to this data request response is classified as non-public transmission confidential information. The contents of the attachment is prohibited from being shared with PacifiCorp’s market affiliate personnel. The Company therefore requests special handling as
stated below. Further to the Company’s response to IPUC Data Request 5 dated April 5, 2023, the Company provides the following additional information responsive to subpart
(c): (c) Referencing the direct testimony of Company witness, Rick T. Link, specifically page 25, footnote 14, the Company responds as follows: Please refer to Non-Public Transmission Confidential Attachment IPUC 5
1st Supplemental which provides a copy of the referenced analysis (the
Transmission Planning - Joint Planning Study – Phase II Joint Study Report (2020-2021) – Boardman to Hemingway (B2H) and Incremental Central Oregon Load). This analysis is the joint work product of the Bonneville Power Administration (BPA), the Idaho Power Company (IPC) and PacifiCorp. The
referenced analysis is classified as critical information (CI). The Company requests special handling. Note: the Company has obtained permission from the appropriate personnel representing BPA and IPC to provide the referenced analysis in this
proceeding.
PAC-E-23-01 / Rocky Mountain Power April 14, 2023 IPUC Data Request 5 – 1st Supplemental
As stated above, this analysis is classified as non-public transmission confidential information. This information is prohibited from being shared with PacifiCorp’s market affiliate personal. The Company is providing the attachment to the requesting party, Idaho Public Utilities Commission (IPUC)
Staff, only. Please refer any requests for access to Mark Alder, Idaho Regulatory Manager, at [phone].
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: Rohan Chatterjee
Sponsor: Rick T. Link / Rick A. Vail