20200115PAC to IIPA WY 200000-539-EA-18 WIEC Set 4 (1).pdf

1407 W North Temple, Suite 330 Salt Lake City, Utah 84116 December 3, 2019 Abigail C. Briggerman, #7-5476
Holland & Hart LLP
6380 South Fiddlers Green Circle, Suite 500 Greenwood Village, CO 80111 [e-mail]
RE: Wyoming Docket 20000-539-EA-18
WIEC 4th Set Data Request (1) Please find enclosed Rocky Mountain Power’s Response to WIEC 4th Set Data Request 4.1. Also provided are Attachments WIEC 4.1 –(1-2).

If you have any questions, please call me at [phone]. Sincerely,

_____/s/_________ Stacy Splittstoesser, Manager, Regulation
Enclosure
C.c: Christopher Leger/OCA [e-mail] (C) Thor Nelson/WIEC [e-mail] (W) Michelle King/WIEC [e-mail] (W) Hannah Oakes/WIEC [e-mail] (W)
Adele Lee/WIEC [e-mail] (W)
Gina Gargano-Amari/WIEC [e-mail] (W)
20000-539-EA-18 / Rocky Mountain Power December 3, 2019
WIEC Data Request 4.1 WIEC Data Request 4.1 Regarding Attachment WIEC 3.1-1, PacifiCorp’s depreciation summary for plant as of
December 31, 2020: a. Please provide all remaining life calculations, in Excel or Word format if possible; and b. Please provide the vintage balances for these accounts through 2020 (see e.g., response to WIEC 1.4-6 and 1.4-7).
Response to WIEC Data Request 4.1 a) The attached file, WIEC 4.1-1 sets forth the remaining life calculations for steam production accounts in the available Word format utilizing the probable retirement dates
incorporated in the response to WIEC 3.1-1. b) The attached file, WIEC 4.1-2, sets forth the vintage balances as of December 31, 2020 for steam production accounts based on the forecasted data through 2020. Respondent: John Spanos
Witness: John Spanos