Hydroelectric power plants in Massachusetts

28 operating hydroelectric power plants in Massachusetts with 265 MW of hydroelectric capacity, largest first. From EIA-860M, August 2026.

Plants

Hydroelectric capacity

265 MW

Net generation, 2025

756 GWh

26 of 28 plants reported

Largest

Cabot

62 MW

Largest hydroelectric power plants in Massachusetts

#	Plant	Hydroelectric MW	2025 net generation, GWhGWh, 2025	Capacity factor	Operator
1	CabotFranklin County	62	239	44.2%	FirstLight Power Resources, Inc. - MA
2	Hadley FallsHampden County	33	137	46.9%	City of Holyoke Gas and Elec Dept - (MA)
3	Cobble MountainHampden County	33	7.1	2.4%	City of Holyoke Gas and Elec Dept - (MA)
4	Boott HydropowerMiddlesex County	23	60.8	30.3%	Boott Hydro, LLC - Hybrid
5	Deerfield 5Berkshire County	18	44.4	29.0%	Great River Hydro, LLC
6	Lawrence Hydroelectric AssociatesEssex County	15	58.9	45.4%	Central Rivers Power US, LLC
7	Fife BrookBerkshire County	11	0.0	–	Bear Swamp Power Company LLC
8	ShermanFranklin County	7.2	27.8	44.2%	Great River Hydro, LLC
9	Riverside HolyokeHampden County	6.9	22.5	37.2%	City of Holyoke Gas and Elec Dept - (MA)
10	Turners FallsFranklin County	5.7	11.8	23.7%	FirstLight Power Resources, Inc. - MA
11	Deerfield 2Franklin County	4.8	29.4	70.0%	Great River Hydro, LLC
12	Deerfield 3Franklin County	4.8	26.5	62.9%	Great River Hydro, LLC
13	Deerfield 4Franklin County	4.8	21.5	51.1%	Great River Hydro, LLC
14	Indian OrchardHampden County	3.7	3.5	10.7%	Central Rivers Power MA, LLC
15	Gardners FallsFranklin County	3.5	11.4	37.2%	Central Rivers Power MA, LLC
16	Oakdale Power StationWorcester County	3.5	1.4	4.4%	Massachusetts Water Res Auth
17	Putts BridgeHampden County	3.2	10.6	37.7%	Central Rivers Power MA, LLC
18	Cosgrove Intake and Power StationWorcester County	3.2	0.0	0.1%	Massachusetts Water Res Auth
19	BoatlockHampden County	3.1	11.6	42.7%	City of Holyoke Gas and Elec Dept - (MA)
20	International Paper Woronoco MillHampden County	2.8	6.6	27.0%	Eagle Creek Renewable Energy, LLC
21	Cabot HolyokeHampden County	2.6	3.0	13.0%	City of Holyoke Gas and Elec Dept - (MA)
22	Pepperell Hydro Power PlantMiddlesex County	2.2	3.8	19.5%	Eagle Creek Renewable Energy, LLC
23	ChemicalHampden County	1.6	5.1	36.7%	City of Holyoke Gas and Elec Dept - (MA)
24	Texon Hydroelectric ProjectHampden County	1.5	3.9	29.9%	Hitchcock Hydro, LLC
25	Indian River HydroHampden County	1.4	1.8	14.7%	Eagle Creek Renewable Energy, LLC
26	DwightHampden County	1.2	5.6	53.2%	Central Rivers Power MA, LLC
27	Collins FacilityHampden County	1.2	–	–	Relevate Power Management LLC
28	Glendale Hydroelectric ProjectBerkshire County	1.1	–	–	Relevate Power Management LLC

Projects where hydroelectric is the largest fuel or at least a fifth of nameplate capacity. MW is hydroelectric nameplate only; net generation covers the whole project. Source: EIA-860M August 2026, published 2026-09-24, and EIA-923 2025. Page updated 2026-10-04. Data sources

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