Hydroelectric power plants in New Hampshire

32 operating hydroelectric power plants in New Hampshire with 516 MW of hydroelectric capacity, largest first. From EIA-860M, August 2026.

Plants

Hydroelectric capacity

516 MW

Net generation, 2025

1.10 TWh

Largest

S C Moore

195 MW

Largest hydroelectric power plants in New Hampshire

#	Plant	Hydroelectric MW	2025 net generation, GWhGWh, 2025	Capacity factor	Operator
1	S C MooreGrafton County	195	255	14.9%	Great River Hydro, LLC
2	ComerfordGrafton County	168	297	20.2%	Great River Hydro, LLC
3	Berlin GorhamCoos County · Hydro and battery storage	30	101	38.7%	Great Lakes Hydro America LLC
4	AmoskeagHillsborough County	16	64.9	46.3%	Central Rivers Power NH, LLC
5	Smith (NH)Coos County	15	87.5	66.6%	Central Rivers Power NH, LLC
6	Garvins FallsMerrimack County	12	24.8	22.8%	Central Rivers Power NH, LLC
7	Pontook Hydro FacilityCoos County	11	50.9	55.4%	Pontook Operating LP
8	Ayers IslandGrafton County	8.4	36.3	49.3%	Central Rivers Power NH, LLC
9	Eastman FallsMerrimack County	6.4	21.9	39.0%	Central Rivers Power NH, LLC
10	Dodge Falls AssociatesGrafton County	5.0	21.6	49.4%	Dodge Falls Associates LP
11	Penacook Lower FallsMerrimack County	4.6	16.1	39.8%	Briar-Hydro Associates
12	Rolfe Canal HydroMerrimack County	4.3	16.3	43.3%	Briar-Hydro Associates
13	Gregg FallsHillsborough County	3.5	7.7	25.2%	Eagle Creek Renewable Energy, LLC
14	Penacook Upper Falls HydroMerrimack County	3.4	11.1	37.3%	Briar-Hydro Associates
15	JackmanHillsborough County	3.2	7.4	26.4%	Central Rivers Power NH, LLC
16	Mine Falls Generating StationHillsborough County	3.0	9.1	34.5%	City of Nashua - (NH)
17	Errol Hydroelectric ProjectCoos County	3.0	13.6	51.9%	Errol Hydroelectric Co LLC
18	Pembroke HydroMerrimack County	2.7	6.7	28.3%	Eagle Creek Renewable Energy, LLC
19	Clement Dam Hydro LLCBelknap County	2.4	6.4	30.6%	Eagle Creek Renewable Energy, LLC
20	GorhamCoos County	2.2	8.4	43.4%	Central Rivers Power NH, LLC
21	Stevens Mills DamMerrimack County	1.9	3.6	21.8%	Eagle Creek Renewable Energy, LLC
22	China Mill HydroMerrimack County	1.7	2.6	17.2%	New Hampshire Hydro Associates
23	HooksettMerrimack County	1.6	6.3	44.7%	Central Rivers Power NH, LLC
24	Mascoma HydroGrafton County	1.5	0.2	1.5%	Green Mountain Power Corp
25	Milton HydroStrafford County	1.4	4.6	37.2%	SFR Hydro Cor
26	Newfound HydroelectricGrafton County	1.4	3.8	30.7%	Eagle Creek Renewable Energy, LLC
27	RollinsfordStrafford County	1.4	3.0	24.1%	Green Mountain Power Corp
28	Somersworth Lower Great DamStrafford County	1.3	0.5	4.4%	Green Mountain Power Corp
29	Hillsborough HosieryHillsborough County	1.2	2.3	21.7%	Silverstreet Hydro
30	Lower Village Water Power ProjectSullivan County	1.2	3.5	32.8%	Sugar River Power LLC
31	Lochmere Hydroelectric PlantBelknap County	1.2	1.8	16.9%	Eagle Creek Renewable Energy, LLC
32	EHC West HopkintonMerrimack County	1.0	1.2	14.1%	Green Mountain Power Corp

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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