Hydroelectric Power Plants in Alaska

Every operating hydroelectric power plant in Alaska on EIA-860M for 2026-07: 28 plants, 56 generating units and 476 MW of nameplate capacity across 10 counties.

As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m

Plants
28
56 generating units
Nameplate capacity
476 MW
Counties
10
Grid operator
Mixed
no single ISO covers a majority

Map of hydroelectric power plants in Alaska

Every one of the 28 plants is drawn at the coordinate EIA files for it.

Loading map…
  • Hydro · 28

List of hydroelectric power plants in Alaska

Sort by any column. Capacity is nameplate, summed across every generating unit EIA lists at the site.

hydroelectric power plants in Alaska
Bradley LakeConventional HydroelectricHomer Electric Assn IncKenai Peninsula12621991Operating
SnettishamConventional HydroelectricAlaska Electric Light & Power Co.Juneau78.231973Operating
Eklutna Hydro ProjectConventional HydroelectricChugach Electric Assn IncMatanuska Susitna44.421955Operating
Terror Lake MicrogridConventional HydroelectricKodiak Electric Assn IncKodiak Island33.631984Operating
Swan LakeConventional HydroelectricSoutheast Alaska Power AgencyKetchikan Gateway22.621984Operating
Tyee Lake Hydroelectric FacilityConventional HydroelectricSoutheast Alaska Power AgencyWrangell Petersburg22.621983Operating
Cooper LakeConventional HydroelectricChugach Electric Assn IncKenai Peninsula19.421961Operating
Green LakeConventional HydroelectricCity & Borough of Sitka - (AK)Sitka18.621982Operating
Blue Lake HydroConventional HydroelectricCity & Borough of Sitka - (AK)Sitka15.932014Operating
Lake Dorothy Hydroelectric ProjectConventional HydroelectricAlaska Electric Light & Power Co.Juneau14.312009Operating
Solomon GulchConventional HydroelectricCopper Valley Elec Assn, IncValdez Cordova1221982Operating
Salmon Creek 1Conventional HydroelectricAlaska Electric Light & Power Co.Juneau8.511984Operating
Allison Creek HydroConventional HydroelectricCopper Valley Elec Assn, IncValdez Cordova6.512016Operating
Power CreekConventional HydroelectricCordova Electric Coop, IncValdez Cordova622001Operating
Beaver FallsConventional HydroelectricKetchikan Public UtilitiesKetchikan Gateway5.431947Operating
Hiilangaay HydroConventional HydroelectricHaida Energy, Inc.Prince of Wales Ketchikan512021Operating
WhitmanConventional HydroelectricKetchikan Public UtilitiesKetchikan Gateway4.822015Operating
Black Bear LakeConventional HydroelectricAlaska Power and Telephone CoPrince of Wales Ketchikan4.511995Operating
KetchikanConventional HydroelectricKetchikan Public UtilitiesKetchikan Gateway4.231938Operating
Annex CreekConventional HydroelectricAlaska Electric Light & Power Co.Juneau421915Operating
Goat Lake HydroConventional HydroelectricAlaska Power and Telephone CoSkagway Hoonah Angoon411997Operating
Purple LakeConventional HydroelectricMetlakatla Power & LightPrince of Wales Ketchikan3.931956Operating
Kasidaya Creek HydroConventional HydroelectricAlaska Power and Telephone CoSkagway Hoonah Angoon312008Operating
Pelican2 technologiesPelican UtilitySkagway Hoonah Angoon2.451984Operating
SilvisConventional HydroelectricKetchikan Public UtilitiesKetchikan Gateway2.111968Operating
South ForkConventional HydroelectricAlaska Power and Telephone CoPrince of Wales Ketchikan212005Operating
Chester LakeConventional HydroelectricMetlakatla Power & LightPrince of Wales Ketchikan1.311988Operating
Humpback CreekConventional HydroelectricCordova Electric Coop, IncValdez Cordova1.231991Operating

Largest hydroelectric power plants in Alaska

  1. 1Bradley LakeKenai Peninsula County, Alaska126 MW
  2. 2SnettishamJuneau County, Alaska78.2 MW
  3. 3Eklutna Hydro ProjectMatanuska Susitna County, Alaska44.4 MW
  4. 4Terror Lake MicrogridKodiak Island County, Alaska33.6 MW
  5. 5Swan LakeKetchikan Gateway County, Alaska22.6 MW
  6. 6Tyee Lake Hydroelectric FacilityWrangell Petersburg County, Alaska22.6 MW
  7. 7Cooper LakeKenai Peninsula County, Alaska19.4 MW
  8. 8Green LakeSitka County, Alaska18.6 MW
  9. 9Blue Lake HydroSitka County, Alaska15.9 MW
  10. 10Lake Dorothy Hydroelectric ProjectJuneau County, Alaska14.3 MW

Hydroelectric power plants by county in Alaska

The county EIA files against each plant. It is the fastest way to find the plant nearest a given town.

CountyPlantsNameplate MW
Kenai Peninsula2145.4
Juneau4105
Matanuska Susitna144.4
Ketchikan Gateway539.1
Sitka234.5
Kodiak Island133.6
Valdez Cordova425.7
Wrangell Petersburg122.6
Prince of Wales Ketchikan516.7
Skagway Hoonah Angoon39.4

Hydroelectric Power Plants in Alaska: FAQ

How many hydroelectric power plants are in Alaska?
28, with 476 MW of nameplate capacity between them, spread over 10 counties. That is the EIA-860M operating count for 2026-07.
Is there a map of Alaska hydroelectric power plants?
Yes — the map above. Each dot is one hydroelectric power plant, sized by nameplate capacity and placed at the coordinates EIA files for it.
Which is the largest hydroelectric power plant in Alaska?
Bradley Lake, at 126 MW. The table is sorted largest first, so the rest follow it.
Is there a hydroelectric power plant near me in Alaska?
The county roll-up below groups every plant by county, which is the quickest way to find the one closest to a given town.
Which grid operator runs Alaska's hydroelectric power plants?
No single ISO or RTO covers most of them. EIA files each plant against its own balancing authority, which in Alaska is largely a vertically integrated utility rather than an organised market.
How current is this, and what is left out?
EIA-860M for 2026-07. Conventional hydroelectric. Pumped storage is counted separately. Plants below 1 MW are not surveyed by EIA and so are absent; retirements and additions after 2026-07 arrive with the next monthly release.