Bennett Mountain
Natural gas power plant in Elmore County, Idaho. 172.8 MW of nameplate capacity across 1 generator, operated by Idaho Power Co.
Also known as Bennett Mountain Power Plant · EIA plant 55733
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 172.8 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- April 2005First generator online
- Operator
- Idaho Power CoEIA operator ID 9191
- Grid
- IPCOBalancing authority IPCO
- Price nodes
- 1 CAISO nodeResource nodes with prices
- Location
- Elmore County, ID43.1472, −115.6666
- EIA plant ID
- 55733EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Bennett Mountain produces
Free · EIA-923Net generation, 2025
999 GWh
999,149 MWh, final
Capacity factor, 2025
66.0%
2024: 60.6%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
86.4–999.1
GWh a year. Low 2017, high 2025
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | Not reported | Not reported | 0 of 12 |
| 2006 | Not reported | Not reported | 0 of 12 |
| 2007 | 183,930 | Not reported | 12 of 12 |
| 2008 | 49,146 | Not reported | 12 of 12 |
| 2009 | 98,711 | Not reported | 12 of 12 |
| 2010 | 41,827 | 2.8% | 12 of 12 |
| 2011 | 48,459 | 3.2% | 12 of 12 |
| 2012 | 53,006 | 3.5% | 12 of 12 |
| 2013 | 80,183 | 5.3% | 12 of 12 |
| 2014 | 70,483 | 4.7% | 12 of 12 |
| 2015 | 157,875 | 10.4% | 12 of 12 |
| 2016 | 103,240 | 6.8% | 12 of 12 |
| 2017 | 86,409 | 5.7% | 12 of 12 |
| 2018 | 149,158 | 9.9% | 12 of 12 |
| 2019 | 317,878 | 21.0% | 12 of 12 |
| 2020 | 310,086 | 20.4% | 12 of 12 |
| 2021 | 354,344 | 23.4% | 12 of 12 |
| 2022 | 235,758 | 15.6% | 12 of 12 |
| 2023 | 725,648 | 47.9% | 12 of 12 |
| 2024 | 919,148 | 60.6% | 12 of 12 |
| 2025 | 999,149 | 66.0% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · CAISOEmissions
Free · EPA CAMPDCO₂, 2025
611,681
US short tons. 2024: 563,103
SO₂, 2025
3
US short tons
NOx, 2025
175
US short tons
CO₂ per MWh, calculated
0.61 t
About 1,224 lb per MWh
1 of 1 EPA units reported CO₂ in 2025 (CT01), matched to EIA plant 55733 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Natural Gas Fired Combustion Turbine | 172.8 | April 2005 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Idaho Power Co as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near Bennett Mountain
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Questions about Bennett Mountain
How much power does Bennett Mountain produce?
Bennett Mountain reported 999,149 MWh (999 GWh) of net generation in 2025, a 66.0% capacity factor on 172.8 MW of nameplate capacity.
Where is Bennett Mountain?
Bennett Mountain is in Elmore County, Idaho, at 43.1472, −115.6666. It is in the Idaho Power Company balancing area (IPCO).
Who operates Bennett Mountain?
EIA-860M for August 2026 lists Idaho Power Co as the operator (EIA operator ID 9191). The operator is not always the owner.
When did Bennett Mountain start operating?
Its first generator began operating in April 2005, according to EIA-860M.
Does InfraMap have power prices for Bennett Mountain?
Yes. InfraMap has CAISO day-ahead and real-time prices at 1 price node linked to Bennett Mountain, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- CAISO day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page