20240418PAC to Staff 4 1st Revised.pdf

RECEIVED
Thursday,April 18,2024 1:46 PM
IDAHO PUBLIC
_ ROCKY MOUNTAIN UTILITIES COMMISSION
POWER
A DIVISION OF PACIFICORP
1407 W North Temple, Suite 330
Salt Lake City, Utah 84116
April 18, 2024
Monica Barrios-Sanchez
Commission Secretary
Idaho Public Utilities Commission
11331 W. Chinden Blvd.
Bldg. 8, Ste. 201-A
Boise, ID 83714
monica.barrio ssanchez(apuc.Idaho.gov
S ecretarygpuc.idaho.gov
RE: ID PAC-E-24-01
IPUC Set 1 (1-18)
Please find enclosed Rocky Mountain Power's 1st Revised Response to IPUC 1st Set Data
Request 4.
If you have any questions, please feel free to call me at(801)220-2313.
Sincerely,
/s/
Mark Alder
Manager, Regulation
Enclosures

PAC-E-24-01 /Rocky Mountain Power
April 18, 2024
IPUC Data Request 4— 1st Revised
IPUC Data Request 4
Please explain whether projected growth is included in the existing Demand
Response (DR)programs and how projected growth is determined. Also, please
explain how this is reflected in the load and resource balance.
V Revised Response to IPUC Data Request 4
Further to the Company's response to IPUC Data Request 4 dated March 15,
2024, the Company provides the following Vt Revised response to include some
additional clarifications which are highlighted in blue and boiil. This 1 st Revised
response replaces, in its entirety, the Company's original response:
Projected growth for existing demand response (DR) programs is not included in
the existing DR program category Epart of modeling in the Integrated
RP�ce Plan (IRE). Growth of existing DR programs is reflected in the
Company's Conservation Potential Assessment (CPA). Projected growth of
existing DR programs is determined by reviewing historical trends and applying
Northwest Power Planning Council (NW Council) assumptions for growth to each
existing program.
For details on how existin DR programs are reflected in the load and resource
balance for the capaciffTBeficiency filing, please refer to the confidential work
paper accompanying the Company's application in this proceeding, specifically
confidential file "PAC-E-24-01 RMP CONF Workpapers 1-19-24". Existing DR
is included as a deduction to the peak load obligation, included in the totals on
rows 16 and 39 of tabs "Smr Peak L&R(No Proxy, Update)" and "Wtr Peak L&R
(No Proxy, Update)". The planning reserve margin (PRM) is applied to the load
after energy efficiency (EE) and DR are netted out, so these programs also avoid
the PRM requirements that would otherwise be applicable to the load that they
offset. Note: for this application, consistent with prior orders, both existing and
planned and approved DR is included on the referenced lines. Within the
Integrated Resource Plan (IRP)planned DR(both approved and not yet approved)
was designated as "new". The Company has modified the labels within column I
of tab "Generator_Battery—Data"—yellow highlight indicates planned and
approved DR that was labeled as "new"within PacifiCorp's 2023 IRP. "Planned
and approved DR"includes growth in existing programs, as projected in the
Company's CPA.
Recordholder: Peter Schaffer /Dan MacNeil
Sponsor: Peter Schaffer /Dan MacNeil