20210910PAC to Staff Supplemental 86.pdf

ROCKY MOUNTAIN
POWER
It::i iLlVE*
Ii;jl $[f l0 PS 2r 3?
,-',. , ,I l': ::i j- ii_l 1407 W North Temple, Suite 330' i ."i1 :--rj - ;,y.iisSisl{ salt Lake citv, Utah 84116
September 10,2021
Jan Noriyuki
Idaho Public Utilities Commission
472W. Washington
Boise, ID 83702-5918
ian.noriyuki@nuc. idaho. sov (C)
RE:ID PAC-E.2I.07
IPUC Set 3 (50-l l0)
Please find enclosed Rocky Mountain Power's I't Supplemental Response to IPUC 3d Set Data
Request 86. Provided via encryption and BOX is Confidential Attachment IPUC 86 I't
Supplemental. Confidential information is provided subject to protected 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 any subsequent Non-
Disclosure Agreement (NDA) executed in this proceeding.
If you have any questions, please feel free to call me at [phone]
Sincerely,
-Jsl-J. Ted Weston
Manager, Regulation
Enclosures
C.c.: Ronald L. Williams/PIIC ronfrDwilliamsbradburv.com
Bradley G. Mullins/PIIC [e-mail]
Adam Gardner/PIIC [e-mail] (w)
Kyle Williams/PIIC [e-mail] (W)
Val Steiner/PIIC [e-mail] (W)
Eric L. Olsen/IIPA [e-mail] (C)
Anthony Yankel/IIPA [e-mail] (C)
Randall C. Budge/Bayer randy@rac ineo lson. com (C)
Thomas J. Budge/Bayer tj @racineolson. com (WXC)
Brian C. Collins/Bayer bcol I in s@con su I tbai. com (WXC)
Maurice B rubaker/Bayer rn bru bak er@.con su ltba i. com (C)
Kevin Higgins/Bayer kh i ss in s@enersvstrat. com (C)
Lance KaufinanlBayer lance@aeeisin si eht. com (C)
James R. Smith/Bayer i im. r. sm i th@i c loud.com (C)
Brad Purdy [e-mail] (C)
Ben Otto/lCL botto@idahocon servation. ors (C)
PAC-E-21-07 / Rocky Mountain Power
September 10,2021
IPUC Data Request 86 - I't Supplemental
IPUC Data Request 86
Please provide a detailed description of the Company's weather/temperature
normalization method used to normalize revenues, system peak, energy loads, net
power costs, and any other items normalized by this method. Please include any
work papers supporting the weather/temperature normalization method for each
item that is normalized.
I't Supplemental Response to IPUC Data Request 86
Further to the Company's response to IPUC Data Request 86 dated August 5,
2021, and referencing the telephone conference held with the ldaho Public
Utilities Commission (IPUC) staff on September 7,2021, the Company provides
the following supplemental information:
Please refer to Confidential Attachment IPUC 86 I't Supplemental which provides
the 2019 and2020 monthly and weather spline models. The monthly models
include the residential class use per day per customer, commercial use per day and
irrigation use per day models. The residential use per day per customer is
multiplied by the actual number of customers in the calculation of the weather
adjustment.
Weather spline models are used to determine the weighting of heating degree days
(HDD) and cooling degree days (CDD) used in the heating and cooling variables.
Please refer to Confidential Attachment IPUC 86 I't Supplemental, specifically
folder *2019 Weather Normalization", file *2019 Weather Adjustment
Calculation", for the details of the calculation of the weather adjustment for 2019.
Please refer to the Company's response to IIPA Data Request 27, specifically
Confidential Attachment IIPA 27-2 for the details of the calculation of the
weather adjustment for 2020.
Confidential information is provided subject to protection under IDAPA
31.01.01 .067 and 31.01.01.233, the IPUC's Rules of ProcedureNo.6T-
Information Exempt from Public Review, and further subject to the Non-
Disclosure Agreement (NDA) executed in this proceeding.
Recordholder:James Zhangl Lee Elder
Robert MeredithSponsor