20210903PAC to Staff 175-195.pdf

1407 W North Temple, Suite 330 Salt Lake City, Utah 84116
September 3, 2021
Jan Noriyuki Idaho Public Utilities Commission
472 W. Washington Boise, ID 83702-5918 [e-mail] (C)
RE: ID PAC-E-21-07
IPUC Set (175-195)
Please find enclosed Rocky Mountain Power’s Responses to IPUC 7th Set Data Requests 175, 177, and 180. The remaining responses will be provided under separate cover. Provided via e-mail is non-confidential Attachment IPUC 175.
If you have any questions, please feel free to call me at [phone].
Sincerely,
____/s/____ J. Ted WestonManager, Regulation
Enclosures C.c.: Ronald L. Williams/PIIC [e-mail] 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 [e-mail] (C) Thomas J. Budge/Bayer [e-mail] (W)(C)
Brian C. Collins/Bayer [e-mail] (W)(C)
Maurice Brubaker/Bayer [e-mail] (C) Kevin Higgins/Bayer [e-mail] (C) Lance Kaufman/Bayer [e-mail] (C) James R. Smith/Bayer [e-mail] (C)
Brad Purdy [e-mail] (C) Ben Otto/ICL [e-mail] (C)
RECEIVED
2021 SEP 3 PM 4:57
IDAHO PUBLIC
UTILITIES COMMISSION
PAC-E-21-07 / Rocky Mountain Power September 3, 2021
IPUC Data Request 175
IPUC Data Request 175 Please provide the work papers for adjustment 7.6 in Witness McDougal’s
testimony.
Response to IPUC Data Request 175 Please refer to Attachment IPUC 175.

Recordholder: Deanna Fladstol and Craig Stelter Sponsor: Steven McDougal

PAC-E-21-07 / Rocky Mountain Power September 3, 2021
IPUC Data Request 177
IPUC Data Request 177 Describe the Company’s criteria for determining when a customer should pay for
a line extension to serve its load versus it being recovered as a system cost.
Please explain how the criteria applies to different size customers and different amounts of capacity of the line extension infrastructure (e.g. primary distribution, secondary distribution, or transmission) needed to serve the customer’s load.
Response to IPUC Data Request 177
Rocky Mountain Power’s (RMP) Regulation No. 12, Line Extensions, is the tariff that specifies what costs customers are responsible for and those the Company is responsible for (system costs, the customer’s allowance). The Company may also
have system costs associated with a customer’s line extension request through the
Company’s share of an upgrade, or through betterment being done at the same time as the line extension work. Certain items are customer responsibilities such as right-of-way (ROW),
trenching, conduit and backfill, and pads and vaults. A customer is also
responsible for the cost of facilities that add to, or substitute for the Company’s standard construction or preferred route. In addition, the customer is responsible for all costs for which their allowance may be applied but are more than their allowance.

The allowance is the amount the Company will expend on a line extension to a customer that the customer would otherwise be required to pay. For residential customers the allowance is $1,550. For non-residential customers taking delivery at less than 44,000 volts the allowance is 0.75 times the customer’s estimated
annual revenue. Non-residential customers taking delivery at 44,000 volts and
above receive an allowance of the metering necessary for billing. If the job cost is less than the allowance, then the allowance is just the eligible job cost. There may also be costs that are not included in the customer job costs. For
network upgrades (increasing capacity of facilities that serve multiple customers)
if the customer’s total load is less than 1,000 kilovolt ampere (kVA), the Company bears the cost of the upgrade. If the customer’s total load is 1,000 kVA or greater, then a proportional share of the cost is assigned to the customer’s job cost, to which the customer’s available allowance is applied. The customer’s
proportional share is calculated as the upgrade cost times (customer’s new load) /
(total available capacity after the upgrade). The portion of the costs not assigned to the customer’s job cost are born by the Company as the Company’s share. The Company’s share of the network upgrade costs is in addition to any allowance being provided.

PAC-E-21-07 / Rocky Mountain Power September 3, 2021
IPUC Data Request 177
Recordholder: Rob Stewart
Sponsor: Steve McDougal

PAC-E-21-07 / Rocky Mountain Power September 3, 2021
IPUC Data Request 180
IPUC Data Request 180 Please provide the Company’s method, guidelines, and/or procedures for
calculating the amount of Contributions in Aid of Construction (CIAC) to be
charged to the customer, developer, or entity requesting the work for transmission capital costs. How is the amount allocated between CIAC and capital costs attributed to network upgrades?
Response to IPUC Data Request 180
The determination of network upgrades is dictated by Federal Energy Regulatory Commission (FERC) Order 890 “Preventing Undue Discrimination and Preference in Transmission Service”.

Per the order, transmission assets that can be used to provide service to any transmission customer are to be designated part of the transmission network and costs socialized across all transmission customers, those assets that are identified as not available for transmission customer service are designated as direct
assigned and not considered part of the transmission network. PacifiCorp adheres
to the direction provided in the FERC order when determining the assignment of assets as network or direct assigned. In the case of this project the construction in aid of construction (CIAC) is commensurate with the identified direct assigned assets.

Recordholder: Brian Fritz Sponsor: Steve McDougal