Hydroelectric power plants in Alaska

32 operating hydroelectric power plants in Alaska with 479 MW of hydroelectric capacity, largest first. From EIA-860M, August 2026.

Plants

Hydroelectric capacity

479 MW

Net generation, 2025

1.75 TWh

31 of 32 plants reported

Largest

Bradley Lake

126 MW

Largest hydroelectric power plants in Alaska

#	Plant	Hydroelectric MW	2025 net generation, GWhGWh, 2025	Capacity factor	Operator
1	Bradley LakeKenai Peninsula	126	415	37.6%	Homer Electric Assn Inc
2	SnettishamJuneau	78	285	41.6%	Alaska Electric Light & Power Co.
3	Eklutna Hydro ProjectMatanuska Susitna	44	158	40.5%	Chugach Electric Assn Inc
4	Terror Lake MicrogridKodiak Island	34	147	50.0%	Kodiak Electric Assn Inc
5	Swan LakeKetchikan Gateway	23	77.6	39.2%	Southeast Alaska Power Agency
6	Tyee Lake Hydroelectric FacilityWrangell Petersburg	23	103	52.2%	Southeast Alaska Power Agency
7	Cooper LakeKenai Peninsula	19	52.5	30.9%	Chugach Electric Assn Inc
8	Green LakeSitka	19	38.5	23.6%	City & Borough of Sitka - (AK)
9	Blue Lake HydroSitka	16	80.9	58.1%	City & Borough of Sitka - (AK)
10	Lake Dorothy Hydroelectric ProjectJuneau	14	81.7	65.2%	Alaska Electric Light & Power Co.
11	Solomon GulchValdez Cordova	12	41.8	39.8%	Copper Valley Elec Assn, Inc
12	Salmon Creek 1Juneau	8.5	30.9	41.5%	Alaska Electric Light & Power Co.
13	Allison Creek HydroValdez Cordova	6.5	22.9	40.2%	Copper Valley Elec Assn, Inc
14	Power CreekValdez Cordova	6.0	21.8	41.5%	Cordova Electric Coop, Inc
15	Beaver FallsKetchikan Gateway	5.4	48.0	101.5%	Ketchikan Public Utilities
16	Hiilangaay HydroPrince of Wales Ketchikan	5.0	6.1	14.0%	Haida Energy, Inc.
17	WhitmanKetchikan Gateway	4.8	7.3	17.5%	Ketchikan Public Utilities
18	Black Bear LakePrince of Wales Ketchikan	4.5	22.8	57.9%	Alaska Power and Telephone Co
19	KetchikanKetchikan Gateway	4.2	22.6	61.5%	Ketchikan Public Utilities
20	Annex CreekJuneau	4.0	10.3	29.5%	Alaska Electric Light & Power Co.
21	Goat Lake HydroSkagway Hoonah Angoon	4.0	14.0	39.9%	Alaska Power and Telephone Co
22	Purple LakePrince of Wales Ketchikan	3.9	13.9	40.7%	Metlakatla Power & Light
23	Kasidaya Creek HydroSkagway Hoonah Angoon	3.0	11.7	44.3%	Alaska Power and Telephone Co
24	SilvisKetchikan Gateway	2.1	14.3	77.8%	Ketchikan Public Utilities
25	South ForkPrince of Wales Ketchikan	2.0	5.6	32.2%	Alaska Power and Telephone Co
26	Gold CreekJuneau	1.6	4.6	5.5%	Alaska Electric Light & Power Co.
27	Chester LakePrince of Wales Ketchikan	1.3	5.2	45.2%	Metlakatla Power & Light
28	King CoveAleutians East · Oil and hydro	1.2	–	–	City of King Cove - (AK)
29	Humpback CreekValdez Cordova	1.2	1.2	11.3%	Cordova Electric Coop, Inc
30	NewhalenLake and Peninsula · Oil and hydro	0.8	3.2	21.5%	I-N-N Electric Coop, Inc
31	GustavusSkagway Hoonah Angoon · Oil and hydro	0.8	4.1	21.2%	Alaska Power and Telephone Co
32	PelicanSkagway Hoonah Angoon · Oil and hydro	0.6	1.7	–	Pelican Utility

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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