20220512Reply Comments.pdf

Avista Corp.
1411 East Mission P.O. Box 3727
Spokane. Washington 99220-0500
Telephone [phone]
Toll Free 800-727-9170
May 12, 2022
Jan Noriyuki, Secretary
Idaho Public Utilities Commission
11331 W. Chinden Blvd. Bldg. 8, Ste. 201-A
Boise, Idaho 83714
RE: Case No. AVU-E-22-02 Capacity Deficiency Period for the Avoided Cost Calculations
Dear Ms. Noriyuki:
Avista Corporation dba Avista Utilities (Avista or the Company) provides the following reply
comments pursuant to Order No. 35347 in Case No. AVU-E-22-02, regarding Avista’s compliance
filing to update and establish its capacity deficiency period to be used for avoided cost calculations.
The comments contained herein are in response to the comments filed by Commission Staff on
May 5, 2022.
Included with these reply comments is an updated Confidential Load and Existing Resource
Balances (L&R) spreadsheet with the following changes recommended by Commission Staff:
1.Use of the most recent load forecast from February 2022.
2.Update of the Colstrip Losses adjustment through 2036 for Idaho’s 35% pro rata share.
3.The use of 2034 and 2036 for the respective retirement dates for Colstrip Units 3 and 4.
4.L&R showing annual and monthly deficits.
The capacity deficiency period has shifted from November 1, 2026, as included in the original
filing, to December 1, 2026, with a shortfall of 155 MW. The reason for the change is primarily
due to the inclusion of Colstrip beyond December 1, 2026, but also the updated load forecast from
February 2022 and including the monthly L&R position are contributing factors. December 1,
2026 should be the date used for the capacity deficiency period.
Lastly, Avista supports Staff’s recommendation to open a generic docket to re-evaluate when the
capacity deficiency date case should be filed.
Please direct any questions regarding this filing to John Lyons at 509-495-8515.
RECEIVED
2022 MAY 12 PM 2:20
IDAHO PUBLIC
UTILITIES COMMISSION

2 | P a g e

Sincerely,

/s/Shawn Bonfield

Shawn Bonfield
Sr. Manager of Regulatory Policy & Strategy
Avista Utilities
509-495-2782
[e-mail]

Enclosure
BEFORE THE
IDAHO PUBLIC UTILITIES COMMISSION

CASE NO. AVU-E-22-02

Attachment - Load and Existing Resource Balances (L&R) spreadsheet -
to Avista Corporation’s May 12, 2022, reply comments
is CONFIDENTIAL