MWPowerPlantFacts
PowerPlantFactsEvidence report · prepared 2 September 2026https://powerplantfacts.com/entity/50704
EIA plant 50704

Somersworth · Strafford · NH

Somersworth Lower Great Dam

Operated by Green Mountain Power Corp

Annual generation1,331 MWhSum of represented EIA-923 rows
Fuel codesWATCodes retained from EIA records
Grid contextISO New England Inc.Balancing authority or NERC region

Published location

Where is Somersworth Lower Great Dam?

This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.

43.251111, -70.840833

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Map data © OpenStreetMap contributors

Capacity is not generation. Nameplate MW describes equipment; annual MWh describes recorded output. Proposed and retired units are not added to operating capacity.

2024 monthly net generation

MonthNet generation
1201 MWh
2262 MWh
3232 MWh
4254 MWh
5310 MWh
672 MWh
70 MWh
80 MWh
90 MWh
100 MWh
110 MWh
120 MWh

Operating generators

IDTechnologyFuelMWStatus
GEN1Conventional HydroelectricWAT1.3OP

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Identity, technology and limitations
EIA plant ID
50704
Sector
Electric Utility
Water source
Salmon Falls River
Data edition
2024-final