How many hydro power plants are in Alaska?

Alaska has 34 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 Alaska?

Bradley Lake in Kenai Peninsula County, Alaska is the largest, at 126 MW. It came online in 1991.

How many hydro power plants were built in Alaska in 2025?

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

Who is developing hydro power plants in Alaska?

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 Alaska

Alaska has 34 operating hydro power plants with 0.5 GW of capacity.

Operating34

Updated monthly. Last updated November 2026.

Under 50 MW50–249 MW250 MW and up

Updated monthly. Last updated November 2026.

Alaska had 31 hydro power plants online in 2016 and 34 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 Alaska

Operating, by capacity

#	Hydro power plant	County	Year online	Capacity
1	Bradley Lake	Kenai Peninsula County	1991	126 MW
2	Snettisham	Juneau County	1990	78 MW
3	Eklutna Hydro Project	Matanuska Susitna County	1955	44 MW
4	Terror Lake Microgrid	Kodiak Island County	2014	34 MW
5	Tyee Lake Hydroelectric Facility	Wrangell Petersburg County	1983	23 MW
6	Swan Lake	Ketchikan Gateway County	1984	23 MW
7	Cooper Lake	Kenai Peninsula County	1961	19 MW
8	Green Lake	Sitka County	1982	19 MW
9	Blue Lake Hydro	Sitka County	2014	16 MW
10	Lake Dorothy Hydroelectric Project	Juneau County	2009	14 MW

Hydro power plants that came online most recently in Alaska

Newest first

#	Hydro power plant	County	Year online	Capacity
1	Petersburg	Wrangell Petersburg County	2023	2 MW
2	Hiilangaay Hydro	Prince of Wales Ketchikan County	2021	5 MW
3	King Cove	Aleutians East County	2017	1 MW
4	Allison Creek Hydro	Valdez Cordova County	2016	7 MW
5	Whitman	Ketchikan Gateway County	2015	5 MW
6	Blue Lake Hydro	Sitka County	2014	16 MW
7	Terror Lake Microgrid	Kodiak Island County	2014	34 MW
8	Lake Dorothy Hydroelectric Project	Juneau County	2009	14 MW
9	Gustavus	Skagway Hoonah Angoon County	2009	1 MW
10	Kasidaya Creek Hydro	Skagway Hoonah Angoon County	2008	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 Alaska

How many hydro power plants are in Alaska?: Alaska has 34 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 Alaska?: Bradley Lake in Kenai Peninsula County, Alaska is the largest, at 126 MW. It came online in 1991.
How many hydro power plants were built in Alaska in 2025?: 0 hydro power plants came online in Alaska in 2025, with 0 MW of capacity.
Who is developing hydro power plants in Alaska?: 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.