How many hydro power plants are in New Hampshire?

New Hampshire has 32 operating utility-scale hydro power plants with 0.5 GW of capacity, according to the EIA's monthly survey of power plants.

What is the largest hydro power plant in New Hampshire?

S C Moore in Grafton County, New Hampshire is the largest, at 195 MW. It came online in 2023.

How many hydro power plants were built in New Hampshire in 2025?

0 hydro power plants came online in New Hampshire in 2025, with 0 MW of capacity.

Who is developing hydro power plants in New Hampshire?

Interconnection queues list each project under a project company, not the developer behind it. Cleanview researches the developer of every project and has them on paid plans.

Hydro power plants in New Hampshire

New Hampshire has 32 operating hydro power plants with 0.5 GW of capacity.

Operating32

Updated monthly. Last updated November 2026.

Under 50 MW50–249 MW250 MW and up

Updated monthly. Last updated November 2026.

New Hampshire had 31 hydro power plants online in 2016 and 32 in 2026

2016’162017’172018’182019’192020’202021’212022’222023’232024’242025’252026’26

Hydro power plants online at the end of each year. Source: EIA-860M, compiled by Cleanview.

The 10 largest hydro power plants in New Hampshire

Operating, by capacity

#	Hydro power plant	County	Year online	Capacity
1	S C Moore	Grafton County	2023	195 MW
2	Comerford	Grafton County	1930	168 MW
3	Berlin Gorham	Coos County	1980	30 MW
4	Amoskeag	Hillsborough	1924	16 MW
5	Smith (NH)	Coos County	1948	15 MW
6	Garvins Falls	Merrimack County	1981	12 MW
7	Pontook Hydro Facility	Coos County	1986	11 MW
8	Ayers Island	Grafton County	1925	8 MW
9	Eastman Falls	Merrimack County	1983	6 MW
10	Dodge Falls Associates	Grafton County	1990	5 MW

Hydro power plants that came online most recently in New Hampshire

Newest first

#	Hydro power plant	County	Year online	Capacity
1	S C Moore	Grafton County	2023	195 MW
2	Lower Village Water Power Project	Sullivan County	1995	1 MW
3	Rollinsford	Strafford County	1995	1 MW
4	Dodge Falls Associates	Grafton County	1990	5 MW
5	Hillsborough Hosiery	Hillsborough	1989	1 MW
6	Mascoma Hydro	Grafton County	1988	2 MW
7	Rolfe Canal Hydro	Merrimack County	1987	4 MW
8	Milton Hydro	Strafford County	1987	1 MW
9	Pontook Hydro Facility	Coos County	1986	11 MW
10	Penacook Upper Falls Hydro	Merrimack County	1986	3 MW

The developer behind each project is on paid plans. See plans

How Cleanview tracks hydro power plants

Operating hydro power plants come from the EIA's monthly survey of power plants. Planned projects come from the grid operators' interconnection queues. We research who is developing each one, since a queue lists a project company, not its owner.

Questions about hydro power plants in New Hampshire

How many hydro power plants are in New Hampshire?: New Hampshire has 32 operating utility-scale hydro power plants with 0.5 GW of capacity, according to the EIA's monthly survey of power plants.
What is the largest hydro power plant in New Hampshire?: S C Moore in Grafton County, New Hampshire is the largest, at 195 MW. It came online in 2023.
How many hydro power plants were built in New Hampshire in 2025?: 0 hydro power plants came online in New Hampshire in 2025, with 0 MW of capacity.
Who is developing hydro power plants in New Hampshire?: Interconnection queues list each project under a project company, not the developer behind it. Cleanview researches the developer of every project and has them on paid plans.