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318.5 MW Natural Gas operating in Payette, ID
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
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| 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
Grid Region
Mountain West
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
Idaho Power Company (IPCO)
Grid Voltage
230.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
206.9K MWh
Latest Month
1.8M MWh
Annual Generation
63.0%
Capacity Factor
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CO₂ Intensity
821 lb/MWh
NOx
0.043 lb/MWh
SO₂
0.004 lb/MWh
CH₄
0.015 lb/MWh
N₂O
0.002 lb/MWh
Capacity Factor
58.4%
Annual Net Gen
1629 GWh
CO₂eq
822 lb/MWh
Subregion
WECC Northwest
Gas turbine · Idaho Power Company · Data from 2015–2024
$1,272/kW
Installed Cost
$17/kW
Annual CapEx
$38.2/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Forward revenue, DSCR bands, and refinancing risk projected under price, demand, and policy scenarios. Powered by InfraSure's asset cashflow stack.
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Market Position
LMP Node
LGPR_2_G011_G012-APND
Pricing Hub
—
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-05-31
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