Upper Salmon A — Plant Summary
- EIA Plant ID
- 822
- Capacity
- 18 MW
- Primary Fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Status
- Operating
- Location
- Twin Falls, ID
- Operating Since
- 1937
- Generators
- 2
- Operator
- Idaho Power Co
- Parent Company
- IDACORP
- Annual Generation
- 107,962 MWh
- Capacity Factor
- 68.2%
- Balancing Authority
- Idaho Power Company
- ISO/RTO
- —
- NERC Region
- WECC
Upper Salmon A
OperatingHydro
Ranked #20 of 76 Hydro plants in ID#505 of 1454 nationally
18 MW Hydro operating in Twin Falls, ID — Idaho Power Company
EIAWD
18 MW
Nameplate Capacity
2
Generators
units
Conventional Hydroelectric
Technology
1937
Operating Since
Location
Coordinates
42.7676, -114.9248
County
Twin Falls, ID
Nearby Plants
- Upper Salmon BHydro16.5 MW · 1.4 km
- Yahoo CreekWind21 MW · 5.9 km
- Pilgrim Stage Wind ParkWind10.5 MW · 6.7 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Idaho Power Co | Idaho Power | — |
| Owner(s) | Idaho Power Co | IDACORP | — |
| Status | Operating | — | — |
Ownership Chain
About
Upper Salmon A is a hydroelectric power plant located in Twin Falls County, Idaho. The plant has a total capacity of 18 MW and consists of two generators utilizing conventional hydroelectric technology. It began operating in 1937 and is owned by IDACORP, with Idaho Power Co. serving as the operator. The plant is ranked 20th out of 76 power plants in Idaho and 511th out of 1464 nationally.
In the most recent year with available data, Upper Salmon A generated 107,962 MWh of electricity, achieving a capacity factor of 68.2%. The plant operates within the Idaho Power Company balancing authority and is part of the Western Electricity Coordinating Council (WECC) NERC region. As of the latest data, there have been two news articles related to the plant, covering regulatory and industry topics.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
Idaho Power Company
Grid Voltage
138 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Generation
6.4K MWh
Latest Month
108.0K MWh
Annual Generation
68.2%
Capacity Factor
Jan 2022 – Dec 2024
Financial Data
No financial data available for this plant.
Pricing & Market Data
Market Position
LMP Node
US12_1_TOT_A_GEN-APND
Pricing Hub
—
News & Articles (5)Beta
Regulatory·permitting
Idaho Power Company; Notice of Intent To File License Application, Filing of Pre-Application Document, and Approving Use of the Traditional Licensing Process
Federal Register (FERC)·3 days ago
General
Idaho Power seeks regulatory approval of 100MW additional BESS after offtake agreement with Savion falls through
Idaho Power is seeking approval from the state regulator to deploy an additional 100MW of BESS to plug the gap left within its portfolio.
Energy-Storage.News·1 years ago
General
Idaho Power begins work on state’s first utility-scale storage installation
Work began last week on Idaho's largest energy storage projects to date, with 80 MW of battery systems being constructed by Idaho Power at its Hemingway...
Daily Energy Insider·3 years ago
General
Cobalt mining back in business in Idaho. What that means for local economy, international supply chain.
Environmental watchdog groups are seeing an uptick in mining proposals in the state amid a growing green technology economy.
KIVI-TV·3 years ago
Last updated 2026-03-25
View all 5 articles