20170925Utah_OCS Set 1 (1-62)2.pdf

1407 W.North Temple
ROCKY MOUNTAIN Salt Lake City,UT 84116
POWER
ADIVISION OF PACIRCORP
August 23,2017
Béla Vastag
Office of Consumer Services
160 East 300 South
Salt Lake City,Utah 84111
bvastag@utahgov (C)
RE:UT Docket No.17-035-39
OCS 1st Set Data Request (1-62)
Please find enclosed Rocky Mountain Power's 1"SupplementalResponse to OCS 1st Set Data
Request 1.6.Provided on the enclosed Confidential CD is Confidential Attachment OCS 1.6 1
Supplemental.Confidential information is provided subject to Public Service Commission of
Utah (UPSC)Rules 746-1-602 and 603.
If you have any questions,please call Tarie Hansen at [phone].
Sincerely,
Bob Lively
Manager,Regulation
Enclosures
C.c.Erika Tedder/DPU [e-mail] (C)
Dan Kohler/DPU [e-mail](C)
Dan Peac/DPU _dAeaco@d_aymarkea.com_(C)(W)
Aliea Afnan/DPU [e-mail] (W)
Philip Hayet/OCS phayet@jkennsom(C)
Gary A.Dodge/UAE gdodge@lglaw._co_m (C)
Kevin Higgins/UAE (C)
Neal Townsend/UAE (C)(W)
17-035-39 /Rocky Mountain Power
August 23,2017
OCS Data Request 1.6 -11 Supplemental
OCS Data Request 1.6
General (IRP)
Please provide the latest GRID modeling files,includingwork papers and GRID access,
consistent with 2017 IRP assumptions.Please supply the Schedule 38 GRID database
from June 21,2017,if a more recent study is not available.
16*SupplementalResponse to OCS Data Request 1.6
Further to the Company's response to OCS Data Request 1.6 dated July 31,2017,the
Company provides the followingsupplemental response:
On August 17,2017,the Company provided the Office of Consumer Services'(OCS)
consultants (Philip Hayet and Leah Wellborn of J.Kennedy and Associates,Inc.)access
to the Generationand Regulation Initiative Decision Tool (GRID)via the internet and
access to the GRID project(s)/scenario(s)explained below.
Access to GRID and its inputs are provided subject to the terms and conditions of the
protective order in this proceeding and may only be disclosed to qualified persons as
defined in that order.
Please refer Confidential Attachment OCS 1.6 16'Supplemental,which provides GRID
project files supporting the recent Schedule 38 GRID database.Included are work papers
supporting data series inputs associated with repowering and work papers necessary to
process the GRID output.The GRID project reflects assumptions from the 2017
Integrated Resource Plan (IRP)as reflected in the June 21,2017 (Docket 17-035-37)
avoided cost inputs compliance filing ("2017.Ql Filing").
Routine Updates (2017.Q1 Filing)
In addition,since the 2017.Q1 Filing,the Company has incorporated three routine
updates to its avoided cost inputs:
1.Routine GRID Update -Update the GRID model to include inputs and assumptions
based on information available as of July 11,2016.
2.Official Forward Price Curve (OFPC)-Update to the curve dated June 30,2017
(1706 OFPC).
3.QualifyingFacility (QF)Queue -Update the QF queue to reflect current signed and
potential QFs.The QF queue was 4,754 megawatts (MW)nameplate in the 2017.Ql
Filing.
17-035-39 /Rocky Mountain Power
August 23,2017
OCS Data Request 1.6 -16'Supplemental
Non-Routine Updates
This request includes one additional non-routine update,for consistency with the
repowering filing:
1.Idaho Power Company (IPC)Energy Imbalance Market (EIM)Participation -An
additional 300 MW of transfer capability is included in GRID from Jim Bridger to
Borah to IPC West to Central Oregon,as a proxy for additional transfer capability on
IPC's system which will be available for EIM dispatch.
Confidential information is provided subject to Public Service Commission of Utah
(UPSC)Rule 746-1-602 and 746-1-603.