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Hannawa

Hydro power plant · St Lawrence County, New York

Nameplate capacity
7.2 MW
Rank in New York
#264
of 1,152 plants
In service since
2014
January 2014

Details

Primary fuel
Hydro
Technology
Conventional Hydroelectric
Operator
Erie Boulevard Hydropower LP
County
St Lawrence County
Generating units
2
Share of state capacity
0.02%
Rank among hydro plants in New York
#57 of 165
EIA plant code
2571

Generating units

Individual generating units at Hannawa
UnitTechnologyNameplateSummerOnlineStatus
1Conventional Hydroelectric3.6 MW3.6 MW2014Operating
2Conventional Hydroelectric3.6 MW3.6 MW2020Operating

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

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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 7.2 MW solar plant and a 7.2 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 New York power plants · What New York actually generates