Effley

Hydro power plant · Lewis County, New York

Nameplate capacity
3.0 MW
Rank in New York
#754
of 1,152 plants
In service since
2002
January 2002

Details

Primary fuel
Hydro
Technology
Conventional Hydroelectric
Operator
Erie Boulevard Hydropower LP
County
Lewis County
Generating units
4
Share of state capacity
0.01%
Rank among hydro plants in New York
#105 of 165
EIA plant code
2557

Generating units

Individual generating units at Effley
UnitTechnologyNameplateSummerOnlineStatus
4Conventional Hydroelectric1.6 MW1.7 MW2023Operating
3Conventional Hydroelectric0.6 MW0.4 MW2010Operating
1Conventional Hydroelectric0.4 MW0.4 MW2002Operating
2Conventional Hydroelectric0.4 MW0.4 MW2007Out of service but expected to return to service in next calendar year

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 New York

ChasmHydro3.0 MW
Croton SolarSolar3.0 MW
Furnace Rd Community Solar FarmSolar3.0 MW
GuntherBattery storage3.0 MW

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 3.0 MW solar plant and a 3.0 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 New York power plants · What New York actually generates