Power plants in Alaska
Alaska has 146 power plants of 1 MW or more in the 2025 EIA-860 data, with 3,116 MW of nameplate capacity, the 47th-largest total among the 50 states and DC. Natural gas accounts for 45% of that capacity. The biggest single site is George M Sullivan Generation Plant 2 at 347 MW. Units that came online from 2020 to 2025 add 161 MW, led by battery storage at 54%. Units retired since 2016 at plants still operating total 158 MW, most of it natural gas.
- Natural gas1,391 MW45%
- Oil and petroleum832 MW27%
- Hydroelectric483 MW15%
- Coal198 MW6.3%
- Battery storage134 MW4.3%
- Wind59.6 MW1.9%
- Biomass and waste11.5 MW0.4%
- Solar7.7 MW0.2%
What is running, by the decade it came online
CoalNatural gasOil and petroleumHydroelectricWindSolarBattery storageBiomass and waste
Columns above the line show capacity still operating in 2025, stacked by fuel. Below the line: capacity retired in each decade at plants that still operate.
The 25 largest plants
| Rank | Plant | Runs on | Capacity | First unit | Operator |
|---|---|---|---|---|---|
| 1 | George M Sullivan Generation Plant 2 | Natural gas | 347 MW | 1979 | Chugach Electric Assn Inc |
| 2 | Beluga | Natural gas | 312 MW | 1968 | Chugach Electric Assn Inc |
| 3 | Southcentral Power Project | Natural gas | 204 MW | 2013 | Chugach Electric Assn Inc |
| 4 | North Pole | Oil and petroleum | 181 MW | 1976 | Golden Valley Elec Assn Inc |
| 5 | Eklutna Generation Station | Natural gas | 171 MW | 2015 | Matanuska Electric Assn Inc |
| 6 | Bradley Lake | Hydroelectric | 126 MW | 1991 | Homer Electric Assn Inc |
| 7 | Soldotna | Natural gas | 96.5 MW | 2014 | Homer Electric Assn Inc |
| 8 | Healy | Coal | 92.8 MW | 1967 | Golden Valley Elec Assn Inc |
| 9 | Nikiski Combined Cycle | Natural gas | 80.8 MW | 1986 | Homer Electric Assn Inc |
| 10 | Snettisham | Hydroelectric | 78.2 MW | 1973 | Alaska Electric Light & Power Co. |
| 11 | Hank Nikkels Plant 1 | Natural gas | 77.9 MW | 1972 | Chugach Electric Assn Inc |
| 12 | Bernice Lake | Natural gas | 76.7 MW | 1971 | Homer Electric Assn Inc |
| 13 | Lemon Creek | Oil and petroleum | 61.7 MW | 1969 | Alaska Electric Light & Power Co. |
| 14 | Eklutna Hydro Project | Hydroelectric | 44.4 MW | 1955 | Chugach Electric Assn Inc |
| 15 | Fairbanks | Oil and petroleum | 42.2 MW | 1970 | Golden Valley Elec Assn Inc |
| 16 | Industrial Plant | Oil and petroleum | 41.7 MW | 2016 | Alaska Electric Light & Power Co. |
| 17 | Battery Energy Storage System | Battery storage | 40 MW | 2003 | Golden Valley Elec Assn Inc |
| 18 | International Battery Substation (IBSS) | Battery storage | 40 MW | 2024 | Chugach Electric Assn Inc |
| 19 | University of Alaska Fairbanks | Coal | 39.6 MW | 1964 | University of Alaska |
| 20 | Auke Bay | Oil and petroleum | 36.2 MW | 1980 | Alaska Electric Light & Power Co. |
| 21 | Eielson AFB Central Heat & Power Plant | Coal | 36 MW | 1955 | U S Air Force-Eielson AFB |
| 22 | Terror Lake Microgrid | Hydroelectric | 33.6 MW | 1984 | Kodiak Electric Assn Inc |
| 23 | Chena Power Plant | Coal | 27.5 MW | 1952 | Aurora Energy LLC |
| 24 | S W Bailey | Oil and petroleum | 25.9 MW | 1969 | Ketchikan Public Utilities |
| 25 | TNSG North Plant | Natural gas | 25.7 MW | 2008 | TDX North Slope Generating Inc. |
Largest plant for each main fuel
| Main fuel | Plants | Capacity | Largest plant | Its capacity |
|---|---|---|---|---|
| Natural gas | 14 | 1,442 MW | George M Sullivan Generation Plant 2 | 347 MW |
| Oil and petroleum | 88 | 824 MW | North Pole | 181 MW |
| Hydroelectric | 28 | 476 MW | Bradley Lake | 126 MW |
| Coal | 5 | 216 MW | Healy | 92.8 MW |
| Battery storage | 5 | 86 MW | Battery Energy Storage System | 40 MW |
| Wind | 4 | 53.5 MW | Eva Creek Wind | 24.6 MW |
| Biomass and waste | 1 | 11.5 MW | JBER Landfill Gas Power Plant | 11.5 MW |
| Solar | 1 | 6 MW | Houston Solar | 6 MW |
Balancing areas
| Area | Plants | Capacity |
|---|---|---|
| Chugach Electric Assn Inc | 1 | 40 MW |
Biggest operators here
| Operator | Plants | Capacity |
|---|---|---|
| Chugach Electric Assn Inc | 7 | 1,045 MW |
| Golden Valley Elec Assn Inc | 6 | 404 MW |
| Homer Electric Assn Inc | 5 | 382 MW |
| Alaska Electric Light & Power Co. | 8 | 254 MW |
| Matanuska Electric Assn Inc | 1 | 171 MW |
| Kodiak Electric Assn Inc | 7 | 84.3 MW |
| Alaska Village Elec Coop, Inc | 31 | 65.3 MW |
| City & Borough of Sitka (AK) | 3 | 60.1 MW |
| Alaska Power and Telephone Co | 14 | 49.4 MW |
| Southeast Alaska Power Agency | 2 | 45.2 MW |