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Boulder

Hydro power plant · Garfield County, Utah

Nameplate capacity
4.2 MW
Rank in Utah
#86
of 131 plants
In service since
1958
August 1958

Details

Primary fuel
Hydro
Technology
Conventional Hydroelectric
Operator
Garkane Energy Coop, Inc
County
Garfield County
Generating units
3
Share of state capacity
0.04%
Rank among hydro plants in Utah
#9 of 29
EIA plant code
3699

Generating units

Individual generating units at Boulder
UnitTechnologyNameplateSummerOnlineStatus
1Conventional Hydroelectric1.4 MW1.4 MW1958Operating
2Conventional Hydroelectric1.4 MW1.4 MW1958Operating
3Conventional Hydroelectric1.4 MW1.4 MW1961Operating

Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.

Similarly sized plants in Utah

About this data

From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 4.2 MW solar plant and a 4.2 MW nuclear plant have the same entry here and produce very different amounts of electricity.

“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Utah power plants · What Utah actually generates