Boulder
Hydro power plant in Garfield County, Utah. 4.2 MW of nameplate capacity across 3 generators, operated by Garkane Energy Coop, Inc.
Also known as Garkane Hydroelectric Plant · Boulder Power Plant · EIA plant 3699
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 4.2 MWNameplate
- Generators
- 3 operatingEIA-860M, August 2026
- Operating since
- August 1958First generator online
- Operator
- Garkane Energy Coop, IncEIA operator ID 6957
- Grid
- WACMBalancing authority WACM
- Price nodes
- None linkedNo verified ISO node
- Location
- Garfield County, UT37.9858, −111.4383
- EIA plant ID
- 3699EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Boulder produces
Free · EIA-923Net generation, 2025
17.2 GWh
17,191 MWh, final
Capacity factor, 2025
46.7%
2024: 55.4%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
17.2–25.6
GWh a year. Low 2025, high 2016
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 0 | Not reported | 12 of 12 |
| 2001 | 24,148 | Not reported | 12 of 12 |
| 2002 | 21,805 | Not reported | 12 of 12 |
| 2003 | 21,916 | Not reported | 12 of 12 |
| 2004 | 21,865 | Not reported | 12 of 12 |
| 2005 | 32,300 | Not reported | 12 of 12 |
| 2006 | 30,756 | Not reported | 12 of 12 |
| 2007 | 21,962 | Not reported | 12 of 12 |
| 2008 | 26,644 | Not reported | 12 of 12 |
| 2009 | 19,256 | Not reported | 12 of 12 |
| 2010 | 21,098 | 57.3% | 12 of 12 |
| 2011 | 26,458 | 71.9% | 12 of 12 |
| 2012 | 23,203 | 62.9% | 12 of 12 |
| 2013 | 20,637 | 56.1% | 12 of 12 |
| 2014 | 20,343 | 55.3% | 12 of 12 |
| 2015 | 22,936 | 62.3% | 12 of 12 |
| 2016 | 25,577 | 69.3% | 12 of 12 |
| 2017 | 24,525 | 66.7% | 12 of 12 |
| 2018 | 19,520 | 53.1% | 12 of 12 |
| 2019 | 25,228 | 68.6% | 12 of 12 |
| 2020 | 22,024 | 59.7% | 12 of 12 |
| 2021 | 24,062 | 65.4% | 12 of 12 |
| 2022 | 18,645 | 50.7% | 12 of 12 |
| 2023 | 20,173 | 54.8% | 12 of 12 |
| 2024 | 20,443 | 55.4% | 12 of 12 |
| 2025 | 17,191 | 46.7% | 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 accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Conventional Hydroelectric | 1.4 | August 1958 |
| 2 | Conventional Hydroelectric | 1.4 | August 1958 |
| 3 | Conventional Hydroelectric | 1.4 | September 1961 |
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 Garkane Energy Coop, Inc as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
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Questions about Boulder
How much power does Boulder produce?
Boulder reported 17,191 MWh (17.2 GWh) of net generation in 2025, a 46.7% capacity factor on 4.2 MW of nameplate capacity.
Where is Boulder?
Boulder is in Garfield County, Utah, at 37.9858, −111.4383. It is in the Western Area Power Administration - Rocky Mountain Region balancing area (WACM).
Who operates Boulder?
EIA-860M for August 2026 lists Garkane Energy Coop, Inc as the operator (EIA operator ID 6957). The operator is not always the owner.
When did Boulder start operating?
Its first generator began operating in August 1958, according to EIA-860M.
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)
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page