Rates and Repayment Services
WAPA’s Media Line: 720-962-7411
Upper Great Plains Region
Current – Firm Power Rate Schedules
2025 Firm Power Service, Firm Peaking Power Service, and Sale of Surplus Product Rate Schedules, effective January 1, 2025, to December 31, 2029, or until superseded
- Schedule of Rates for Firm Power Service (PDF)
- Schedule of Rates for Firm Peaking Power Service (PDF)
- Schedule of Rates for Sale of Surplus Products (PDF)
Previous – Rate Schedules
2023 Firm Power Service, Firm Peaking Power Service, and Sale of Surplus Product Rate Schedules, effective January 1, 2023 to December 31, 2027, or until superseded
- Schedule of Rates for Firm Power Service (PDF)
- Schedule of Rates for Firm Peaking Power Service (PDF)
- Schedule of Rates for Sale of Surplus Products (PDF)
2018 Firm Power Service, Firm Peaking Power Service, and Sale of Surplus Product Rate Schedules, effective January 1, 2018 to December 31, 2022, or until superseded
- Schedule of Rates for Firm Power Service (PDF)
- Schedule of Rates for Firm Peaking Power Service (PDF)
- Schedule of Rates for Sale of Surplus Products (PDF)
2017 Modified Drought Adder Charges, effective January 1, 2017 to December 31, 2019, or until superseded
- Modified Drought Adder Charges for Firm Power Service (PDF)
- Modified Drought Adder Charges for Firm Peaking Power Service (PDF)
2015 Firm Power Service and Firm Peaking Power Service Rate Schedules, effective January 1, 2015 to December 31, 2019, or until superseded
- Firm Power Service (PDF) Rate Schedule
- Firm Peaking Power Service (PDF) Rate Schedule
Previous – Firm Power Rate Adjustment Process
- 2025 Firm Power Service, Firm Peaking Power Service, and Sale of Surplus Product Rate Adjustment Process
- 2023 Firm Power Service, Firm Peaking Power Service, and Sale of Surplus Product Rate Adjustment Process
- 2018 Firm Power Service, Firm Peaking Power Service, and Sale of Surplus Product Rate Adjustment Process
- 2015 Firm Power Service and Firm Peaking Power Service Rate Adjustment Process
Transmission and Ancillary Service Rates
UGP’s current and previous rate calculations include; 1) UGP’s Annual Transmission Revenue Requirement (ATRR) for its transmission facilities included in the Southwest Power Pool, Inc. (SPP) Regional Transmission Organization (RTO) Tariff for the SPP Zone 19 known as the Upper Missouri Zone (UMZ); and 2) UGP’s Annual Revenue Requirement (ARR) for the Ancillary Services it provides under the SPP Tariff in its WAUW Balancing Authority Area. For additional information on UGP’s Transmission and Ancillary Service calculated rates and Rate Schedules, see the homepage and “Rates” folder on UGP’s Open Access Same-Time Information System (OASIS).
2026 Transmission and Ancillary Service Rate Process
- Rate Order No. WAPA-218 [oasis.oati.com] (SPP RTO Expansion into Western Interconnection effective ~ 4/1/2026 through 3/31/31)
2025 Transmission and Ancillary Service Rate Process
- Rate Order No. WAPA-217 [oasis.oati.com] (Rate Schedules effective 10/1/25 through 9/30/2030)
2020 Transmission and Ancillary Service Rate Process
- Rate Order No. WAPA-188 [oasis.oati.com] (Rates Schedules effective 10/1/2020 through 9/30/2025)
Current – Power Reporting
Previous – Power Reporting
- FY23 Power Supply, Deliveries, & Income (PDF)
- FY23 Oct-Mar Power Supply, Deliveries, & Income (PDF)
- 2022 Power Supply, Deliveries, & Income (PDF)
- 2021 Power Supply, Deliveries, & Income (PDF)
- 2020 Power Supply, Deliveries, & Income (PDF)
- 2019 Power Supply, Deliveries, & Income (PDF)
- 2018 Power Supply, Deliveries, & Income (PDF)
- 5 Year Composite Rate Projection (PDF), September 2018
- Upper Great Plains Potential Energy Resource Composition (PDF), September 2016
- Upper Great Plains Firming Energy Purchases (PDF), September 2015
Current – Newsroom
- 12/30/24 FRN – Proposed SPP RTO Expansion into Western Interconnection (PDF)
- 12/20/24 FRN – Transmission Rate Extension (PDF)
- 11/20/24 Letter –Announcing Rate Adjustment FRN (PDF)
- 11/20/24 FRN – Rate Adjustment (PDF) [FederalRegister.gov]
- 10/22/24 Letter – 2024 Fall Customer Advanced Notice Drought Adder (PDF)
- 8/26/24 FRN – Proposed Transmission Rate Extension (PDF)
- 7/1/24 Letter – 2024 Summer Customer Advance Notice Drought Adder (PDF)
- 7/1/24 Letter – Announcing Proposed Rate Adjustment FRN (PDF)
- 6/28/24 FRN – Proposed Rate Adjustment (PDF)
Previous – Newsroom
- 10/17/23 Letter – 2023 Fall Customer Advance Notice Drought Adder (PDF)
- 06/13/23 Letter – 2023 Summer Customer Advance Notice Drought Adder (PDF)
- 06/20/22 Letter – 2022 Summer Customer Advance Notice Drought Adder (PDF)
- 10/28/22 Letter – 2022 Fall Customer Advance Notice Drought Adder (PDF)
- 7/5/17 Letter (PDF) – Announcing Proposed Rate Adjustment FRN
- 7/3/17 FRN (PDF) – Proposed Rate Adjustment
- 3/10/17 Customer Letter-Informal Webinar (PDF)
- 3/8/17 Email Save-the-Date (PDF) – Informal Customer Webinar
- 8/12/16 Letter – 2017 Drought Adder Reduction (PDF)
- 6/30/16 Letter – Preliminary Review of 2017 Drought Adder Component (PDF)
- 8/23/15 Letter – Final Notice of 2016 Drought Adder Component (PDF)
- 10/4/21 Letter – 2021 Fall Customer Advance Notice Drought Adder (PDF)
- 06/09/21 Letter – 2021 Summer Customer Advance Notice Drought Adder (PDF)
- 10/2/20 Letter – 2020 Fall Customer Advance Notice Drought Adder (PDF)
- 06/25/20 Letter – 2020 Summer Customer Advance Notice Drought Adder (PDF)
- 10/15/18 Letter – 2018 Fall Customer Advance Notice Drought Adder (PDF)
- 06/22/18 Letter – 2018 Summer Customer Advance Notice Drought Adder (PDF)
- 12/01/17 New Rate Schedules Approved for January 1, 2018 (PDF)
- 08/22/17 Public Information and Comment Forums, Proposed 2018 Rate Adjustment Process (PDF)
- 08/18/17 2018 Firm Rate-Brochure (PDF)
- 04/18/17 Customer Information Webinar (PDF)-Proposed 2018 Rate Process
- 11/12/16 WAPA keeps communities competitive, reduces customer rates (PDF)
Linda Cady-Hoffman, Rates Manager
Western Area Power Administration
Upper Great Plains Region
2900 4th Avenue North, 6th Floor
Billings, MT 59101
Phone: (406) 702-4791
Email: cady@wapa.gov
Last modified on January 7th, 2025