318.5 MW Natural Gas operating in Payette, ID — Idaho Power Company
318.5 MW
Nameplate Capacity
2
Generators
units
Natural Gas Fired Combined Cycle
Technology
2012
Operating Since
Coordinates
43.9046, -116.8205
County
Payette, ID
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Idaho Power Co | Idaho Power | — |
| Owner(s) | Idaho Power Co | IDACORP | — |
| Status | Operating | — | — |
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
NERC Region
WECC
Balancing Authority
Idaho Power Company
Grid Voltage
230 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
206.9K MWh
Latest Month
1.8M MWh
Annual Generation
63.0%
Capacity Factor
$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
Market Position
LMP Node
LGPR_2_G011_G012-APND
Pricing Hub
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Last updated 2026-03-31
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