Langley Gulch Power Plant — Plant Summary
- EIA Plant ID
- 57028
- Capacity
- 318.5 MW
- Primary Fuel
- Natural Gas
- Technology
- Natural Gas Fired Combined Cycle
- Status
- Operating
- Location
- Payette, ID
- Operating Since
- 2012
- Generators
- 2
- Operator
- Idaho Power Co
- Parent Company
- IDACORP
- Annual Generation
- 1,755,150 MWh
- Capacity Factor
- 63.0%
- Balancing Authority
- Idaho Power Company
- ISO/RTO
- —
- NERC Region
- WECC
Langley Gulch Power Plant
OperatingNatural Gas
Ranked #1 of 9 Natural Gas plants in ID#622 of 2009 nationally
318.5 MW Natural Gas operating in Payette, ID — Idaho Power Company
EIAWD
318.5 MW
Nameplate Capacity
2
Generators
units
Natural Gas Fired Combined Cycle
Technology
2012
Operating Since
Location
Coordinates
43.9046, -116.8205
County
Payette, ID
Nearby Plants
- Thunderegg Solar Center, LLCSolar10 MW · 13.8 km
- Morgan Solar CenterSolar3 MW · 20.8 km
- Open Range Solar Center, LLCSolar10 MW · 22.8 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Idaho Power Co | Idaho Power | — |
| Owner(s) | Idaho Power Co | IDACORP | — |
| Status | Operating | — | — |
Ownership Chain
About
Langley Gulch Power Plant is a 318.5 MW natural gas-fired combined cycle facility located in Payette County, Idaho. The plant began operating in 2012 and is owned by IDACORP and operated by Idaho Power Co. It consists of two generators. Langley Gulch is the largest of five natural gas plants in Idaho, and ranks 623rd out of 945 nationally.
In the most recent year of data, the plant generated 1,755,150 MWh, achieving a capacity factor of 63.0%. The plant operates within the Idaho Power Company balancing authority, in the Western Electricity Coordinating Council (WECC) NERC region. Financial data indicates an installed cost of $1,184.56 per kW, according to FERC filings.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
Idaho Power Company
Grid Voltage
230 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Generation
206.9K MWh
Latest Month
1.8M MWh
Annual Generation
63.0%
Capacity Factor
Jan 2023 – Dec 2025
Financial DataBeta
Source: FERC Form 1HIGH
$1,272/kW
Installed Cost
$38.2/MWh
Operating Cost
Idaho Power Company
Reporting Utility
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Pricing & Market Data
Market Position
LMP Node
LGPR_2_G011_G012-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
Industry·corporate
Idaho Power is waging war on renewable energy. Is it winning?
One of the West's great old-school monopolies and its multi-pronged attack on wind and solar.
Idaho Power (operator)
High Country News·12 years ago
Last updated 2026-03-25
View all articles