Upper Salmon B — Plant Summary
- EIA Plant ID
- 7079
- Capacity
- 16.5 MW
- Primary Fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Status
- Operating
- Location
- Twin Falls, ID
- Operating Since
- 1947
- Generators
- 2
- Operator
- Idaho Power Co
- Parent Company
- IDACORP
- Annual Generation
- 102,286 MWh
- Capacity Factor
- 69.4%
- Balancing Authority
- Idaho Power Company
- ISO/RTO
- —
- NERC Region
- WECC
Upper Salmon B
OperatingHydro
Ranked #21 of 76 Hydro plants in ID#518 of 1454 nationally
16.5 MW Hydro operating in Twin Falls, ID — Idaho Power Company
EIAWD
16.5 MW
Nameplate Capacity
2
Generators
units
Conventional Hydroelectric
Technology
1947
Operating Since
Location
Coordinates
42.7664, -114.9083
County
Twin Falls, ID
Nearby Plants
- Upper Salmon AHydro18 MW · 1.4 km
- Thousand SpringsHydro6.8 MW · 6.5 km
- Yahoo CreekWind21 MW · 7.2 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 B is a hydroelectric power plant located in Twin Falls County, Idaho. The plant has a total capacity of 16.5 MW across two generators. It began operating in 1947 and is owned by IDACORP and operated by Idaho Power Company. The plant utilizes conventional hydroelectric technology and its primary fuel source is water (WAT).
In the most recent year of reported generation data, Upper Salmon B produced 102,286 MWh of electricity, achieving a capacity factor of 69.4%. The plant operates within the Idaho Power Company balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. Upper Salmon B is ranked as the 21st largest power plant in Idaho out of 76, and 527th nationally out of 1464 plants.
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
6.7K MWh
Latest Month
102.3K MWh
Annual Generation
69.4%
Capacity Factor
Jan 2022 – Dec 2024
Financial Data
No financial data available for this plant.
Pricing & Market Data
Market Position
LMP Node
US34_1_TOT_B_GEN-APND
Pricing Hub
—
News & Articles (2)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
Idaho Power Company (applicant)
Federal Register (FERC)·3 days ago
Regulatory·federal policy
Idaho Power faces $1 million fine after reporting violations
Idaho environmental officials are proposing a $1 million fine as part of a settlement agreement with Idaho Power involving pollution permits.
Idaho Power (other)
KTVB·3 years ago
Last updated 2026-03-25
View all articles