20241015Application.pdf

RECEIVED
Tuesday, October 15, 2024
IDAHO PUBLIC
UTILITIES COMMISSION
_ ROCKY MOUNTAIN 1407 W. North Temple
4 POWER. Salt Lake City,UT 84116
A DIVISION OF PACIFICORP
October 14, 2024
VIA ELECTRONIC DELIVERY
Idaho Public Utilities Commission
11331 W. Chinden Blvd.
Building 8 Suite 201A
Boise, ID 83714
Attn: Jan Noriyuki
Commission Secretary
RE: CASE NO. PAC-E-24-12
IN THE MATTER OF THE APPLICATION OF ROCKY MOUNTAIN POWER
TO UPDATE LOAD AND GAS FORECASTS USED IN THE INTEGRATED
RESOURCE PLAN AVOIDED COST MODEL
Dear Ms. Noriyuki:
Rocky Mountain Power hereby submits for filing with the Idaho Public Utilities Commission its
Application in the above-referenced matter.
Informal questions related to this matter may be directed to Mark Alder, Idaho Regulatory
Manager at(801) 220-2313.
Sincerely,
A 9�z 0-ID
Joelle Steward
Senior Vice President, Regulation
Enclosures

Joe Dallas (ISB# 10330)
825 NE Multnomah Street, Suite 2000
Portland, OR 97232
Telephone: [phone]
Email:joseph.dallas(ibpacificorp.com
Attorney for Rocky Mountain Power
BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IN THE MATTER OF THE APPLICATION ) CASE NO. PAC-E-24-12
OF ROCKY MOUNTAIN POWER TO )
UPDATE LOAD AND GAS FORECASTS ) APPLICATION OF
USED IN THE INTEGRATED RESOURCE ) ROCKY MOUNTAIN POWER
PLAN AVOIDED COST MODEL )
Rocky Mountain Power, a division of PacifiCorp, ("Company"), hereby respectfully
submits this Application to the Idaho Public Utilities Commission,("Commission"),in compliance
with Order Nos. 32697 and 32802 to update the load forecast, natural gas forecast, and long-term
contract components of the Integrated Resource Plan ("IRP") avoided cost model. In support of
this Application, Rocky Mountain Power states as follows:
1. Rocky Mountain Power provides electric service to retail customers in the states of
Idaho, Utah, and Wyoming. Rocky Mountain Power is a public utility in the state of Idaho and is
subject to the Commission's jurisdiction with respect to its prices and terms of electric service to
retail customers pursuant to Idaho Code 61-129. Rocky Mountain Power provides retail electric
service to approximately 91,000 customers in the state of Idaho.
L BACKGROUND
2. Order No. 32697 specified that the inputs to the IRP methodology calculation,
utilized to determine the avoided cost for all new Public Utility Regulatory Policies Act of 1978
("PURPA") qualifying facility ("QF") projects that exceed the published rate eligibility cap, will
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be updated every two years upon acknowledgement of the utility's IRP filing with the exception
of the load and the natural gas forecasts which are to be updated annually by June 1st of each year.
The Commission ruled:
"We find that, in order to maintain the most accurate and up to date reflection of a
utility's true avoided cost, utilities must update fuel price forecasts and load
forecasts annually between IRP filings. For the sake of consistency, these annual
updates should occur simultaneously with SAR updates- on June 1 of each year In
addition, it is appropriate to consider long-term contract commitments because of
the potential effect that such commitments have on a utility's load and resource
balance. We find it reasonable to include long-term contract considerations in an
IRP Methodology calculation at such time as the QF and utility have entered into
a signed contract for the sale and purchase of QF power We further find it
appropriate to consider PURPA contracts that have terminated or expired in each
utility's load and resource balance. We find it reasonable that all other variables
and assumptions utilized within the IRP Methodology remain fixed between IRP
filings (every two years). "1
3. Order No. 32802 changed the due date of the annual update from June 1 st to October
15th of each year. If approved, the load forecast, natural gas forecast, and contract information
presented below will be incorporated into Rocky Mountain Power's IRP avoided cost model.
Consistent with the Commission's prior orders,this methodology will be utilized by the Company
as the starting point for negotiation of contractual avoided cost rates as of January 1, 2025.
IL LOAD FORECAST
4. The Company's June 2024 and May 2023 long-term load forecasts are summarized
in Table 1. The June 2024 load forecast shows overall an increase in load compared to the May
2023 load forecast provided in Case No. PAC-E-23-20, which was subsequently approved by
Commission Order No. 36038. The change in the forecast is primarily due to growth expectations
for industrial and commercial customers in Utah and Oregon.
1 In the matter of the Commission' review of PURPA QF contract provisions including the Surrogate Avoided
Resources(SAR)and Integrated Resource Planning(IRP)methodologies for calculating avoided cost rates. Case
No. GNR-E-11-03,Order No. 32697,p.22.
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Table 1
Rocky Mountain Power
Load Forecast Update
Annual GWh
Load Forecast-June 2024
Year California Idaho Oregon Utah Washington Wyoming FERC Total
2024 847 3,788 16,482 27,598 4,486 9,556 305 63,061
2025 840 3,823 17,246 28,889 4,445 9,577 293 65,113
2026 836 3,822 17,456 30,375 4,442 9,513 287 66,731
2027 832 3,821 18,989 32,256 4,593 9,496 138 70,124
2028 828 3,820 20,474 34,824 4,744 9,470 - 74,160
2029 819 3,803 21,885 36,033 4,701 9,429 - 76,671
2030 812 3,790 22,641 36,796 4,670 9,382 - 78,091
2031 804 3,772 23,960 37,734 4,629 9,355 - 80,254
2032 798 3,758 25,751 38,469 4,600 9,321 - 82,697
2033 788 3,734 25,656 38,928 4,554 9,275 - 82,935
2034 780 3,717 25,765 39,082 4,524 9,224 - 83,093
2035 774 3,705 25,935 39,277 4,505 9,163 - 83,358
2036 771 3,702 26,192 39,589 4,511 9,130 - 83,896
2037 764 3,693 26,404 39,816 4,503 9,063 - 84,244
2038 761 3,692 26,696 40,160 4,518 9,024 - 84,851
2039 758 3,697 27,004 40,547 4,540 8,994 - 85,541
2040 759 3,711 27,359 41,015 4,579 8,988 - 86,411
2041 755 3,713 27,655 41,339 4,594 8,942 - 86,998
2042 754 3,728 28,010 41,750 4,629 8,925 - 87,796
2043 753 3,742 28,349 42,132 4,659 8,904 - 88,538
Load Forecast-May 2023
Year California Idaho Oregon Utah Washington Wyoming FERC Total
2023 851 3,929 15,682 27,338 4,471 9,549 265 62,083
2024 838 3,933 16,350 28,812 4,493 9,655 250 64,331
2025 830 3,929 17,203 29,761 4,455 9,705 244 66,126
2026 825 3,929 17,561 30,915 4,437 9,689 242 67,599
2027 821 3,926 18,697 32,532 4,412 9,701 117 70,206
2028 819 3,926 20,325 35,625 4,401 9,716 - 74,812
2029 813 3,909 21,786 36,002 4,374 9,673 - 76,556
2030 811 3,897 22,668 36,845 4,358 9,636 - 78,215
2031 808 3,882 23,648 37,222 4,346 9,633 - 79,538
2032 807 3,871 23,991 37,150 4,337 9,620 - 79,776
2033 803 3,849 23,248 37,257 4,311 9,604 - 79,071
2034 801 3,832 23,375 37,355 4,302 9,597 - 79,263
2035 800 3,819 23,560 37,488 4,301 9,597 - 79,564
2036 799 3,811 23,819 37,694 4,317 9,615 - 80,057
2037 795 3,795 24,021 37,778 4,318 9,594 - 80,299
2038 793 3,788 24,293 38,027 4,335 9,608 - 80,844
2039 792 3,785 24,583 38,317 4,359 9,632 - 81,467
2040 793 3,787 24,911 38,640 4,399 9,670 - 82,199
2041 792 3,781 25,195 38,962 4,422 9,680 - 82,832
2042 794 3,791 25,510 39,648 4,468 9,721 - 83,931
2043 795 3,803 25,837 40,401 4,515 9,766 - 85,117
Loads are net of Demand Side Management
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III. NATURAL GAS PRICE FORECAST
5. The Company's most recent Official Forward Price Curve ("OFPC")was prepared
on September 30, 2024 ("2409 OFPC"). The price forecast used in Case No. PAC-E-23-20 was
prepared on September 30, 2023 ("2309 OFPC"). Table 2 provides the 2409 OFPC natural gas
prices summarized annually by market hub. The 2309 OFPC is also provided for reference only.
The updated gas prices are lower in the near term and remain lower at most hubs over the forecast
horizon, though prices at Henry Hub are higher starting in 2029 and prices at Opal are higher
starting in 2035.
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Table 2
Rocky Mountain Power
Natural Gas Price Update
$/MMBtu
Offical Forward Price Curve (2409)-09/30/2024
Henry Hub SOCALBOR
Year Opal Gas Index Sumas Index Stanfield Index San Juan Index Index AECO Index Index
2024(a) $4.66 $5.89 $3.22 $3.86 $3.13 $1.55 $4.59
2025 $3.82 $4.23 $3.00 $3.38 $3.39 $1.83 $4.00
2026 $4.04 $4.50 $3.31 $3.66 $3.65 $2.25 $4.35
2027 $4.06 $4.44 $3.44 $3.75 $3.76 $2.46 $4.42
2028 $4.47 $4.48 $4.06 $4.20 $4.52 $3.35 $4.79
2029 $4.96 $4.74 $4.68 $4.70 $5.26 $4.16 $5.25
2030 $5.02 $4.74 $4.73 $4.79 $5.34 $4.24 $5.30
2031 $5.09 $4.79 $4.79 $4.87 $5.38 $4.32 $5.37
2032 $5.15 $4.81 $4.81 $4.94 $5.40 $4.37 $5.42
2033 $5.36 $4.98 $4.99 $5.13 $5.53 $4.52 $5.64
2034 $5.53 $5.13 $5.12 $5.30 $5.65 $4.65 $5.82
2035 $5.82 $5.37 $5.38 $5.58 $5.91 $4.87 $6.12
2036 $6.04 $5.56 $5.55 $5.79 $6.11 $5.04 $6.35
2037 $6.40 $5.87 $5.88 $6.15 $6.44 $5.33 $6.72
2038 $6.74 $6.17 $6.18 $6.49 $6.77 $5.64 $7.07
2039 $7.11 $6.50 $6.52 $6.85 $7.12 $5.96 $7.45
2040 $7.57 $6.87 $6.91 $7.31 $7.52 $6.31 $7.92
2041 $7.98 $7.19 $7.24 $7.71 $7.87 $6.64 $8.34
2042 $8.48 $7.62 $7.68 $8.21 $8.34 $7.05 $8.86
2043 $8.95 $7.98 $8.06 $8.69 $8.79 $7.44 $9.34
(a)2024 Forecast gas prices are for November and December only
Offical Forward Price Curve (2309)-09/29/2023
Henry Hub SOCALBOR
Year Opal Gas Index Sumas Index Stanfield Index San Juan Index Index AECO Index Index
2024(a) $5.47 $7.86 $4.23 $4.64 $3.95 $2.74 $5.83
2025 $4.55 $5.25 $3.83 $4.08 $3.95 $2.74 $5.31
2026 $4.41 $4.89 $3.95 $4.16 $4.09 $3.01 $5.24
2027 $4.53 $4.90 $4.47 $4.46 $4.55 $3.79 $5.20
2028 $4.69 $5.09 $4.94 $4.75 $4.95 $4.43 $5.20
2029 $5.08 $5.51 $5.30 $5.08 $5.17 $4.83 $5.57
2030 $5.15 $5.61 $5.39 $5.13 $5.14 $4.90 $5.66
2031 $5.22 $5.72 $5.51 $5.24 $5.19 $4.94 $5.78
2032 $5.33 $5.86 $5.66 $5.37 $5.30 $5.02 $5.94
2033 $5.55 $6.18 $5.90 $5.60 $5.50 $5.20 $6.18
2034 $5.71 $6.36 $6.12 $5.81 $5.66 $5.33 $6.42
2035 $5.81 $6.31 $6.26 $5.96 $5.76 $5.42 $6.56
2036 $5.92 $6.41 $6.42 $6.12 $5.91 $5.52 $6.72
2037 $6.25 $6.72 $6.79 $6.47 $6.24 $5.79 $7.09
2038 $6.47 $6.93 $7.02 $6.70 $6.47 $5.98 $7.32
2039 $6.80 $7.29 $7.41 $7.08 $6.82 $6.27 $7.71
2040 $7.23 $7.93 $7.84 $7.49 $7.23 $6.66 $8.14
2041 $7.59 $8.30 $8.23 $7.88 $7.63 $6.99 $8.53
2042 $7.99 $8.71 $8.64 $8.30 $8.12 $7.37 $8.95
2043 $8.22 $8.96 $8.96 $8.66 $8.52 $7.65 $9.28
(a)2024 Forecast gas prices are for November and December only
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IV. CONTRACT TERMINATIONS,EXPIRATIONS,AND ADDITIONS
6. Since filing Case No. PAC-E-23-20, the Company has signed 18 long-term
contracts, including ten long-term contracts with qualifying facilities, for a total nameplate
capacity of 771.7 megawatts.Five long-term contracts have terminated or expired without renewal
for a total nameplate capacity of 43.9 megawatts. Table 3 provides a list of signed and expired or
terminated contracts since October 1, 2023.
7. Rocky Mountain Power currently has 44 non-PURPA, long-term power purchase
agreements with a nameplate capacity of 5,094 megawatts, and 167 PURPA QF contracts with a
nameplate capacity of 2,242 megawatts. New contracts, terminated or expired, as well as new
contract pricing are all updated in the IRP model on a continuous basis.
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Table 3
Rocky Mountain Power
Long-Term Contracts
Long Term Contracts signed since the October 2023 Filing
No. Contract Qualifying Facility(QF) Nameplate(MW) Start Date End Date
1 Green Solar LLC OR Community Solar QF PPA 2.875 7/23/2024 7/22/2044
2 Sprague Hydro, LLC QF PPA 1.238 1/1/2024 12/31/2038
3 Farmers Irrigation District QF PPA 4.4 1/1/2026 12/31/2040
4 Canyon\dle Solar 1 LLC OR Community Solar OF PPA 1.0 5/1/2026 4/30/2046
5 Canyon\dle Solar 2 LLC OR Community Solar QF PPA 1.5 5/1/2026 4/30/2046
6 Wood River Solar, LLC OR Community Solar QF PPA 0.4 9/30/2024 8/23/2044
7 Blackwell Creek Solar, LLC OR Community Solar QF PPA 1.4 9/30/2024 8/29/2044
8 Tacoma Power Meaningful Priority Share of
Grant PUD Priest Rapids Project PPA 37.0 1/1/2025 12/31/2025
9 Cowlitz Meaningful Priority Share of Grant
PUD Priest Rapids Project PPA 21.0 1/1/2025 12/31/2025
10 PacifCorp's Share of Grant PUD
Meaningful Priority Slice PPA 150.0 1/1/2025 12/31/2025
11 Dominguez Grid LLC PPA 200.0 6/1/2026 5/31/2048
12 Escalante BESS I LLC PPA 80.0 6/1/2026 5/31/2046
13 Enterprise Storage LLC PPA 80.0 6/1/2026 5/31/2046
14 Granite Mountain BESS East LLC PPA 80.0 6/1/2026 5/31/2046
15 Iron Springs BESS LLC PPA 80.0 6/1/2026 5/31/2046
16 Siskiyou Power Authority(Box Canyon) QF PPA 5.0 7/1/2024 12/31/2029
17 Gooding Community Solar LLC OR Community Solar QF PPA 1.0 9/6/2024 9/5/2044
18 Tesoro Refining and Marketing Company QF PPA 25.0 1/1/2025 12/31/2025
Total Signed MW 771.7
Long Term Contracts Expired or Terminated since the October 2023 Filing
No. Contract Qualifying Facility(QF) Nameplate(MW) Date
Combine Hills I, LLC PPA 41.0 12/21/2023
City of Albany, Dept.of Public Works QF PPA 0.50 4/10/2024
Stahlbush Island Farms, Inc QF PPA 1.60 5/31/2024
Eagle Point Irrigation District(Nichols Gap) QF PPA 0.72 6/30/2024
Loyd Fery QF PPA 0.07 6/30/2024
Total Terminated MW 43.9
V. COMMUNICATIONS
8. Communications regarding this filing should be addressed to:
Mark Alder
Idaho Regulatory Affairs Manager
Rocky Mountain Power
1407 West North Temple, Suite 330
Salt Lake City, Utah 84116
Telephone: [phone]
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Email: mark.alderkpacificorp.com
Joe Dallas (ISB# 10330)
825 NE Multnomah Street, Suite 2000
Portland, OR 97232
Telephone: [phone]
Email:joseph.dallas&pacificorp.com
In addition, Rocky Mountain Power requests that all data requests regarding this Application be
sent in Microsoft Word to the following:
By email (preferred): datarequestgpacificorp.com
By regular mail: Data Request Response Center
PacifiCorp
825 Multnomah, Suite 2000
Portland, Oregon 97232
Informal questions may be directed to Mark Alder, Idaho Regulatory Affairs Manager at (801)
220-2313.
VI. MODIFIED PROCEDURE
9. The Company believes that a hearing is not necessary to consider the issues
presented herein and respectfully requests that this Application be processed under Modified
Procedure; i.e., by written submissions rather than by hearing. RP 201 et seq.
VII. REQUEST FOR RELIEF
10. WHEREFORE, Rocky Mountain Power hereby respectfully submits its updated
load forecast, natural gas forecast, and QF contract information in compliance with the
Commission's directives in Order Nos. 32697 and 32802 and requests that the Commission issue
an order approving this updated information for inclusion in the Company's IRP avoided cost
calculations effective January 1, 2025.
DATED this 10' day of October 2024.
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Respectfully submitted,
ROCKY MOUNTAIN POWER
Joe Dallas (ISB# 10330)
825 NE Multnomah Street, Suite 2000
Portland, OR 97232
Telephone: [phone]
Email:joseph.dallaskpacificorp.com
Attorney for Rocky Mountain Power
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