20260226Supplemental Direct Testimony B. Dumas.pdf

RECEIVED
FEBRUARY 26, 2026
IDAHO PUBLIC
UTILITIES COMMISSION
BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IN THE MATTER OF THE APPLICATION )
OF IDAHO POWER COMPANY' S )
COMPLIANCE WITH ORDER NOS . 34031 ) CASE NO. IPC-E-25-35
AND 35816 FOR A PRUDENCE )
DETERMINATION OF HELLS CANYON )
COMPLEX RELICENSING COSTS FROM )
JANUARY 1, 2016, THROUGH )
DECEMBER 31, 2025 . )
IDAHO POWER COMPANY
SUPPLEMENTAL DIRECT TESTIMONY
OF
Brett Dumas

1 Q. Please state your name, business address, and
2 current position with Idaho Power Company ("Idaho Power" or
3 "Company") .
4 A. My name is Brett Dumas . My business address is
5 1221 West Idaho Street, Boise, Idaho 83702 . I am employed
6 by Idaho Power as the Environmental Affairs Director in the
7 Power Supply Business Unit.
8 Q. What is the purpose of your supplemental
9 testimony?
10 A. The purpose of my supplemental testimony is to
11 sponsor updated Hells Canyon Complex ("HCC") relicensing
12 cost information through December 31, 2025, and to provide
13 an update on the status of the Federal Energy Regulatory
14 Commission' s ("FERC") National Environmental Policy Act
15 ("NEPA") review for the HCC license application.
16 Q. Are you sponsoring any supplemental exhibits?
17 A. Yes . I am sponsoring Supplemental Exhibit No .
18 1 - Relicensing Expenditures by Project 2016-2025 . 1 This
19 exhibit updates and replaces Exhibit 1 filed with my direct
20 testimony to reflect HCC relicensing costs recorded through
21 December 31, 2025 .
1 Exhibit 1 filed with the Company's original Application was labeled "2015-
2025." The correct period reflected in the exhibit is 2016-2025, consistent
with the scope of costs presented. The exhibit title has been corrected in this
supplemental filing.
DUMAS, SUPP DI 1
Idaho Power Company

1 Q. Have additional HCC relicensing costs been
2 recorded since you filed your original testimony?
3 A. Yes . Supplemental Exhibit No . 1 reflects
4 additional HCC relicensing costs recorded through December
5 31, 2025 . The increase since my original Exhibit 1 is
6 primarily attributable to Allowance for Funds Used During
7 Construction associated with previously incurred
8 capitalizable relicensing costs, together with a limited
9 amount of additional fourth-quarter 2025 expenditures .
10 Q. Have there been any developments in the FERC
11 NEPA process since you filed your original testimony?
12 A. Yes . Subsequent to the filing of my direct
13 testimony, FERC issued a draft supplemental Environmental
14 Impact Statement ("EIS") for the HCC relicensing
15 proceeding.
16 Q. What is the significance of FERC issuing the
17 draft supplemental EIS?
18 A. Issuance of the draft supplemental EIS
19 represents a major procedural milestone in FERC' s NEPA
20 review for the HCC license application. The supplemental
21 EIS evaluates updated information filed by Idaho Power
22 since the 2007 final EIS, including the Clean Water Act
23 Section 401 certifications, revised protection and
24 mitigation measures, updated biological assessments for
25 Endangered Species Act consultation, and the 2024
DUMAS, SUPP DI 2
Idaho Power Company

1 settlement with the United States Forest Service under
2 Federal Power Act Section 4 (e) . The draft supplemental EIS
3 advances the relicensing process toward completion of NEPA
4 review and eventual license issuance.
5 Q. Does the draft supplemental EIS affect your
6 testimony regarding relicensing costs?
7 A. No. The expenditures reflected in Supplemental
8 Exhibit No . 1 include costs incurred to support FERC' s
9 supplemental NEPA review. Issuance of the draft
10 supplemental EIS represents continued progress in the
11 relicensing process based on those materials .
12 Q. Do you have any changes to the conclusions
13 presented in your original testimony?
14 A. No. My original testimony remains accurate and
15 unchanged except as supplemented here.
16 Q. Does this conclude your testimony?
17 A. Yes, it does .
18
DUMAS, SUPP DI 3
Idaho Power Company

1 DECLARATION OF BRETT DUMAS
2 I, Brett Dumas, declare under penalty of perjury
3 under the laws of the state of Idaho:
4 1 . My name is Brett Dumas . I am employed by
5 Idaho Power Company as the Environmental Affairs Director
6 in the Power Supply Department.
7 2 . On behalf of Idaho Power, I present this
8 pre-filed supplemental testimony and Supplemental Exhibit
9 No . 1 in this matter.
10 3 . To the best of my knowledge, my pre-filed
11 supplemental testimony and exhibit are true and accurate .
12 I hereby declare that the above statement is true to
13 the best of my knowledge and belief, and that I understand
14 it is made for use as evidence before the Idaho Public
15 Utilities Commission and is subject to penalty for perjury.
16 SIGNED this 26th day of February 2026, at Boise,
17 Idaho .
18
19
20 Signed.
21 Brett Dumas
DUMAS, SUPP DI 4
Idaho Power Company

BEFORE THE
IDAHO PUBLIC UTILITIES COMMISSION
CASE NO. IPC-E-25-35
IDAHO POWER COMPANY
DUMAS, SUPP DI
TESTIMONY
EXHIBIT NO. 1

HCC RELICENSING EXPENDITURES
BY BUDGET ID AND WORK ORDER(INCLUDING AFUDC)
JANUARY 1,2016-December 31,2025
Year
Note Cost Center Description Outstanding Regulatory Process Budget ID Description WO Project ID Description 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 WO Status
601 Power Supply Administration All HCC Relicensing B032000-HC Relicensing Legal 27134878-HELLS CANYON RELICENSING OUTSIDE LEGAL FEES 3,129,539 3,426,260 3,349,190 3,411,479 3,184,325 3,197,078 3,344,364 3,674,719 3,830,832 3,995,214 Active
601 Power Supply Administration All HCC Relicensing B032000-HC Relicensing Legal 27238462-LEGAL DEPT.LABOR FOR RELICENSING:HELLS 675,101 724,420 779,443 705,155 609,045 586,498 617,533 694,174 695,032 725,288 Active
CANYON COMPLEX
1 604 Oxbow PP Maint Crews All HCC Relicensing B00400502-Rel-HCC Baker County Agreement: 27185311-RELICENSING:BAKER COUNTY SETTLEMENT 199,426 (497,654) 12,313 - - - - - - - Closed
Western Region Sponsored AGRMT-LAW ENFORCE,ROAD
2 661 River Engineering N/A.Removed from Relicensing.CHQB100109-HC Hydraulic Model Development, 27360909-HC HYDRAULIC MODEL DEVELOPMENT, (225,368) - - - - - - - - - Closed
Maintenance and Operation MAINTENANCE AND OPERATION
1 661 River Engineering All HCC Relicensing CHQB100111-HC Relocate Compliance Gage 27470807-HC COMPLIANCE GAGE PERMITTING AND 1,777 1,266 (181) - - - - - - - Complete
CONSTRUCTION
ESA Consultation primarily,but CHQB110140-HC Evaluation of Mainstem Sediment 27360905-HC EVALUATION OF MAINSTEM SEDIMENT
1 661 River Engineering also some aspects related to all Transport TRANSPORT 342,360 (190,710) (3,681) - - - - - - - Closed
HCC relicensing and NEPA
ESA Consultation primarily,but
1 661 River Engineering also some aspects related to all CHQB110141-HC Prepare Annual Sediment Report 27360906-HC PREPARE ANNUAL SEDIMENT REPORT 43,164 (54,652) - - - - - - - - Closed
HCC relicensing and NEPA
ESA Consultation primarily,but
1 661 River Engineering also some aspects related to all CHQB110143-Below HCD Tributary Sediment Supply 27360908-BELOW HCD TRIBUTARY SEDIMENT SUPPLY 160,368 (111,251) - - - - - - - - Closed
HCC relicensing and NEPA
1 661 River Engineering CWA§401 Certification CHQB130016-HCC Watershed Development Support 27388669-HCC WATERSHED DEVELOPMENT SUPPORT 262,247 92,601 (114,514) - - - - - - - Complete
1 661 River Engineering CWA§401 Certification CHQB130016-HCC Watershed Development Support 27471740-SNAKE RIVER STEWARDSHIP PROJECT 2 - 114,612 (3,164) - - - - - - - Complete
ESA Consultation primarily,but
661 River Engineering also some aspects related to all CHQB170026-HC Sediment Programs 27474654-HC SEDIMENT PROGRAMS - 552,409 635,639 645,318 866,286 901,286 735,363 877,825 894,438 860,802 Active
HCC relicensing and NEPA
670 Environmental Admin All HCC Relicensing B00400435-Annual Oregon Water Resources 27161764-REL-HCC OREGON REAUTHORIZATION 346,576 380,080 409,785 442,191 468,783 505,909 644,437 693,351 888,005 967,502 Active
Department Fees For The HCC
670 Environmental Admin All HCC Relicensing CHQB200001-HCC Relicensing 27530938-HCC RELICENSING:APPLICATION REVIEW 46,795 49,743 1 72,599 78,4861 230,644 95,058 1 201,606 Active
1 671 Environmental-Terrestrial All HCC Relicensing B00600391-HCC Relicensing Baker County 27219994-TERR-HCC BAKER COUNTY WEED PAYMENTS 10,545 (24,935) - - - - - - - - Closed
Settlement-weeds (RELICENSING)
671 Environmental-Terrestrial NEPA BLPR100100-HCC Relicensing Eagle Monitoring&EIS 27361422-TERR:HCC RELIC WILDLIFE 12,389 12,516 21,226 27,302 15,147 10,410 11,143 11,986 12,589 13,476 Active
Preparation
671 Environmental-Terrestrial NEPA BLPR100104-HCC Relicensing Cultural Resource 27361424-TERR:HCC RELIC CULTURAL 6,769 75,228 65,280 66,225 59,155 52,537 98,219 123,343 108,214 131,590 Active
Management
671 Environmental-Terrestrial All HCC Relicensing BLPR100117-HCC Relicensing Weed Control 27361426-TERR:HCC RELIC COUNTY WEEDS 9,834 12,634 15,052 19,740 13,130 16,036 19,738 20,440 22,818 24,087 Active
1 672 Environmental-Recreation All HCC Relicensing B00400465-HCC Relicensing:Recreation Sponsored 27161796-REL-REC HCC RELICENSING PROCESS 46,792 47,890 52,586 57,275 58,728 (506,733) (4,524) - - - Closed
1 672 Environmental-Recreation All HCC Relicensing B00400466-HCC Baker County Settlement: 27234342-REC-BAKER COUNTY SETTLEMENT AGREEMENT 141,883 (507,057) 0 - - - - - - - Closed
Recreation Sponsored LITTER&SAN PLAN
1 672 Environmental-Recreation All HCC Relicensing B00400466-HCC Baker County Settlement: 27278220-REC-BAKER COUNTY SETTLEMENT AGREEMENT 80,916 (125,076) (409) - - - - - - - Closed
Recreation Sponsored
B01100174-Hells Canyon Relicensing 27330380-HCCRELICENSING:HARTAND 401 FEES-STATE
1 673 Environmental-Water Quality CWA§401 Certification Reauthorization&Relicensing From State of Oregon OF OREGON 145,561 190,449 112,037 76,710 31,271 (419,875) - - - - Closed
(Hart and 401)
CHQB110104-WQ Hells Canyon 401 Application 27359878-WQ HCC401 APPLICATION,REVISION,
1 673 Environmental-Water Quality CWA§401 Certification Revision,Communication,Consultation COMMUNICATION,CONSULTATION 293,748 248,833 312,208 211,996 209,672 (1,129,350) - - - - Closed
673 Environmental-Water Quality CWA§401 Certification CHQB110121-HCC Relicensing Mercury Studies 27359880-WQ HCC401 CERTIFICATION OPS AND ENG 960,039 1,079,543 1,170,662 1,592,709 1,377,486 2,004,409 2,126,098 2,230,802 1,657,550 1,206,128 Active
TEMPERATURE STUDIES
1 673 Environmental-Water Quality CWA§401 Certification CHQB110122-HCC Relicensing Water Quality 27359876-HCC RELICENSING WATER QUALITY MONITORING 279,626 323,582 308,445 352,532 378,703 (758,798) 1,671 (13,629) - - Closed
Monitoring
673 Environmental-Water Quality CWA§401 Certification CHQB130007-HCC Snake River Stewardship Program 27379855-HCC WATERSHED ENHANCEMENT PROGRAM 1,099,013 1,738,294 1,503,416 167,404 853,221 848,006 829,396 889,374 907,500 942,879 Active
Development DEVELOPMENT
1 673 Environmental-Water Quality CWA§401 Certification CHQB160060-HCC Bayha Research Project 27438918-BAYHA ISLAND RESEARCH PROJECT 3,472,503 723,207 446,666 498,346 1 417,232 1 (1,480,494) (0) Closed
1 673 Environmental-Water Quality CWA 401 Certification CHQB160061-HCC Grand View Irrigation Upgrade 27438915-GRAND VIEW IRRIGATION UPGRADE RESEARCH 608,817 730,998 993,650 338,474 298,360 (826,776) - - - - Closed
Research Project PROJECT
1 673 Environmental-Water Quality CWA§401 Certification CHQB160062-HCC Powder River Tributary Research 27438920-TRIBUTARY ENHANCEMENT RESEARCH PROJECT 244,356 194,903 244,270 134,407 159,971 1 125,058 1 (334,916) (4,857) - - Closed
Project
Exhibit No.1
Case No.IPC-E-25-35
B.Dumas Supp DI,IPC
1 of

Year
Note Cost Center Description Outstanding Regulatory Process Budget ID Description WO Project ID Description 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 WO Status
1 673 Environmental-Water Quality CWA§401 Certification CHQB160064-HOC Daly Creek Riparian Enhancement 27455091-DALY CREEK RIPARIAN ENHANCEMENT RESEARCH 88,656 39,228 22,632 15,942 12,828 13,856 14,833 (72,791) 70 (1,005) Closed
Project PROJECT
1 673 Environmental-Water Quality CWA§401 Certification CHQB170054-HCC Weiser River Tributary Research 27481527-WEISER RIVER TRIBUTARY ENHANCEMENT - 53,995 193,747 145,254 133,932 40,811 (101,958) (2,333) - - Closed
Project RESEARCH PROJECT
673 Environmental-Water Quality All HCC Relicensing CHQB110121-HCC Mercury Numeric Model 27534334-HCC MERCURY NUMERIC MODEL DEVELOPMENT - - - 99,821 187,587 282,341 445,881 379,960 108,528 112,101 Active
Development
673 Environmental-Water Quality All HCC Relicensing CHQB200003-Snake River Stewardship Program 27532310-REPORTING MODEL FOR SNAKE RIVER - - - 1,480,435 993,440 765,291 544,544 384,327 318,352 370,499 Active
Database and Reporting Tool STEWARDSHIP(SRSP)
674 Environmental-Fisheries ESA Consultation BLPR110118-Fall Chinook Salmon Population 27360126-FALL CHINOOK PROGRAM-FC VIABILITY (6,514) - - - - - - - - - Closed
Viability Analysis ANALYSIS-HCC RELICENSE
674 Environmental-Fisheries ESA Consultation BLPR110118-Fall Chinook Salmon Population 27465187-FALL CHINOOK SALMON VIABILITY-PART 2 25,724 111,603 - - - - - - - - Closed
Viability Analysis
674 Environmental-Fisheries ESA Consultation BLPR140001-Bull Trout Program-HCC Relicensing 27359954-BULL TROUT PROGRAM-ADMINISTRATION-HCC 569,664 642,596 728,085 800,965 825,509 912,436 930,675 1,171,823 1,126,612 1,179,316 Active
RELICENSING
674 Environmental-Fisheries ESA Consultation BLPR140002-Fall Chinook Program-HCC Relicensing 27360122-FALL CHINOOK PROGRAM-REDD SURVEYS 294,868 320,021 317,364 364,719 365,635 439,734 499,033 575,112 560,941 640,864 Active
674 Environmental-Fisheries ESA Consultation BLPR140002-Fall Chinook Program-HCC Relicensing 27360123-FALL CHINOOK PROGRAM-ENTRAPMENT 84,204 54,453 128,418 125,472 145,213 189,587 198,366 195,132 189,363 232,997 Active
MONITORING
1 674 Environmental-Fisheries ESA Consultation BLPR140002-Fall Chinook Program-HCC Relicensing 27360125-PACIFIC LAMPREY STATUS MONITORING-HCC (1,143) - - - - - - - - - Closed
RELICENSE
674 Environmental-Fisheries NEPA BLPR140003-Pacific Lamprey-HCC Relicensing 27590758-PACIFIC LAMPREY-2021 AND 202 14,578 1,240 3,856 19,799 4,330 Active
1 674 Environmental-Fisheries NEPA BLPR170008-White Sturgeon Program-HCC 27469334-WHITE STURGEON PROGRAM-HCC RELICENSING 393,710 251,254 288,357 522,340 555,423 484,775 (475,468) (10,371) - - Closed
Relicensing
674 Environmental-Fisheries ESA Consultation CHQB130005-HCC Relicensing-Anadromous 27368568-HELLS CANYON NOAA BIOLOGICAL ASSESSMENT 22,332 61,497 32,872 87,188 324,496 183,552 111,726 219,282 153,467 159,066 Active
Biological Assessment
1 674 Environmental-Fisheries NEPA CHQB130012-Tributary Habitat Enhancement Plan- 27384922-THEP-WATER EFFICIENCY PILOT PROGRAM 21,123 (27,314) - - - - - - - - Closed
Pilot Project
674 Environmental-Fisheries CWA§401 Certification HCPR130004-HCD Surface Collector 27462725-HCD SURFACE COLLECTOR FEASIBILITY STUDY 543,158 Closed
3 699 Power Supply Accounting Charge All HCC Relicensing BO_REL_ROLLUP-Relicensing Rollup RELICBLP-ROLLUP RELIC COST BROWNLEE 6,874,565 8,442,290 8,355,763 8,967,895 9,438,677 13,372,637 12,183,209 12,659,851 13,280,109 14,214,838 Active
3 699 Power Supply Accounting Charge All HCC Relicensing BO_REL_ROLLUP-Relicensing Rollup RELICHCP-ROLLUP RELIC COST HELLS CANYON 4,684,257 5,733,444 5,695,143 6,106,826 6,427,412 9,067,565 8,280,867 8,6091700 9,031,711 9:668,093 Active
3 699 Power Supply Accounting Charge All HCC Relicensing BO_REL_ROLLUP-Relicensing Rollup RELICOBP-ROLLUP RELIC COST OXBOW 2,176,098 2,677,155 2,650,672 2,841,135 2,990,284 4,261,241 3,869,624 4,017,922 4,214,659 4,511,628 Active
4 699 Power Supply Accounting Charge All HCC Relicensing B0_REL_ROLLUP-Relicensing Rollup REUCRESV-Relicensing Rollup (8,075,157) (693,517) (692,762) (729,130) (787,583) (843,085) (906,883) (952,491) (1,019,605) Active
28,118,682 19,443,455 28,030,153 29,659,287 30,721,566 32,438,620 33,826,497 36,642,760 37,163,155 39,141,695
Notes.
1-Credits for AFUDC reclassifications to the HCC roll-up work orders are included in this total.The offsetting debits were reclassified to the three roll-up projects.These entries net to zero.
2-Determined not to be a relicensing expense.Removed from relicensing balance.
3-Primarily AFUDC charges on the accumulated relicensing balance that has been reclassified to the Hells Canyon roll-up work orders.
4-2017 includes the expenditures that were reclassified to either a regulatory asset or O&M per Order No.34031.2018 is made up of primarily AFUDC credits on work orders that have a credit balance.
Exhibit No.1
Case No.IPC-E-25-35
6.Dumas Supp DI,IPC
2 of