Home / Power plants / Maine
Power Plants in Maine
All 276 operable plants · EIA inventory, August 2026.
Total capacity
6.2 GW
44th largest of the 50 states and DC
Plants
276
274 in service
Largest plant
863 MW
William F Wyman Hybrid
Capacity by fuel
26%
23%
20%
16%
12%
| Fuel | Capacity | Share | Plants |
|---|---|---|---|
| Natural gas | 1,579 MW | 25.6% | 5 |
| Other | 1,436 MW | 23.3% | 18 |
| Wind | 1,217 MW | 19.7% | 22 |
| Solar | 968 MW | 15.7% | 177 |
| Hydro | 770 MW | 12.5% | 49 |
| Battery storage | 202 MW | 3.3% | 5 |
Nameplate capacity — what the fleet could produce running flat out — not what it actually generated. A plant is filed under the fuel carrying most of its capacity. See what Maine actually generated →
Largest plants in Maine
| # | Plant | Fuel | Capacity | Online |
|---|---|---|---|---|
| 1 | William F Wyman HybridCumberland County | Other | 863 MW | 1957 |
| 2 | Westbrook Energy Center Power PlantCumberland County | Natural gas | 564 MW | 2001 |
| 3 | Maine Independence StationPenobscot County | Natural gas | 550 MW | 2000 |
| 4 | Rumford Power LLCOxford County | Natural gas | 275 MW | 2000 |
| 5 | Bucksport Generation LLCHancock County | Natural gas | 187 MW | 2001 |
| 6 | Bingham WindPiscataquis County | Wind | 186 MW | 2016 |
| 7 | Cross Town Energy StorageCumberland County | Battery storage | 175 MW | 2025 |
| 8 | Great Lakes Hydro America - MEPenobscot County | Hydro | 158 MW | 1917 |
| 9 | Oakfield Wind ProjectAroostook County | Wind | 148 MW | 2015 |
| 10 | Kibby Wind FacilityFranklin County | Wind | 132 MW | 2009 |
Maine's generating fleet in context
Maine's power-generation fleet holds 6.2 gigawatts of capacity, ranking 44th of the 50 states and DC. The state operates 276 plants, of which 274 are in service. These numbers describe capacity — what the equipment could produce running flat out — not the electricity actually generated, which varies with fuel source and operating patterns.
Natural gas provides the largest share at 25.6%, spread across 5 plants. Other fuels account for 23.3% of capacity in 18 plants, while wind comprises 19.7% from 22 plants and solar makes up 15.7% from 177 installations. Hydro and battery storage round out the fleet at 12.5% and 3.3% respectively. The largest single plant is William F Wyman Hybrid, an other-fuel facility with 863 megawatts, followed by two natural-gas plants: Westbrook Energy Center at 564 megawatts and Maine Independence Station at 550 megawatts.
The fleet spans more than a century. S D Warren Westbrook came online in January 1903, while USS Weld Solar LLC, the newest addition, entered service in December 2025.
Written from the EIA figures on this page, covering data through August 2026.
Every plant in Maine, by fuel
Natural gas5 plants · 1,579 MW
All US natural gas plants →| Plant | County | Capacity | Units | Online |
|---|---|---|---|---|
| Westbrook Energy Center Power Plant | Cumberland | 564 MW | 3 | 2001 |
| Maine Independence Station | Penobscot | 550 MW | 3 | 2000 |
| Rumford Power LLC | Oxford | 275 MW | 2 | 2000 |
| Bucksport Generation LLC | Hancock | 187 MW | 1 | 2001 |
| Eastern Maine Medical Center | Penobscot | 3.8 MW | 1 | 2006 |
Other18 plants · 1,436 MW
All US other plants →| Plant | County | Capacity | Units | Online |
|---|---|---|---|---|
| William F Wyman Hybrid | Cumberland | 863 MW | 5 | 1957 |
| Somerset Plant | Somerset | 107 MW | 2 | 1976 |
| Rumford Cogeneration | Oxford | 103 MW | 1 | 1990 |
| Woodland Pulp, LLC | Washington | 68 MW | 12 | 1906 |
| ReEnergy Stratton LLC | Franklin | 47 MW | 1 | 1989 |
| ReEnergy Livermore Falls | Androscoggin | 40 MW | 1 | 1992 |
| Cape Gas Turbine | Cumberland | 35 MW | 2 | 1970 |
| Red Shield Envir Old Town Facility | Penobscot | 29 MW | 2 | 1965 |
| NE Renewable Power Jonesboro | Washington | 28 MW | 1 | 1987 |
| NE Renewable Power West Enfield | Penobscot | 28 MW | 1 | 1987 |
| Eagle Point Energy Center | Penobscot | 25 MW | 1 | 1987 |
| Twin Rivers Paper Co LLC | Aroostook | 22 MW | 1 | 1987 |
| Regional Waste Systems | Cumberland | 13 MW | 1 | 1988 |
| Georges River Energy | Waldo | 10 MW | 1 | 2018 |
| Athens Energy | Somerset | 8.5 MW | 1 | 2016 |
| MMWAC Resource Recovery Facility | Androscoggin | 5.0 MW | 1 | 1992 |
| Robbins Lumber | WALDO | 3.2 MW | 2 | 1981 |
| Waste Management Crossroads LFGTE | Somerset | 3.2 MW | 2 | 2009 |
Wind22 plants · 1,217 MW
All US wind plants →| Plant | County | Capacity | Units | Online |
|---|---|---|---|---|
| Bingham Wind | Piscataquis | 186 MW | 1 | 2016 |
| Oakfield Wind Project | Aroostook | 148 MW | 1 | 2015 |
| Kibby Wind Facility | Franklin | 132 MW | 2 | 2009 |
| Downeast Wind | Washington | 126 MW | 1 | 2025 |
| Weaver Wind | Hancock | 73 MW | 1 | 2020 |
| Rollins Wind Project | Penobscot | 60 MW | 1 | 2011 |
| Moscow | Somerset | 59 MW | 1 | 2025 |
| Stetson Wind I | Washington | 57 MW | 1 | 2009 |
| Hancock Wind Plant | Hancock | 51 MW | 1 | 2016 |
| Record Hill Wind | Oxford | 51 MW | 1 | 2012 |
| Passadumkeag Windpark LLC | Penobscot | 43 MW | 1 | 2016 |
| Mars Hill Wind Farm Project | Aroostook | 42 MW | 1 | 2007 |
| Bull Hill Wind Project | Hancock | 35 MW | 1 | 2012 |
| Saddleback Ridge Wind Farm | Franklin | 34 MW | 2 | 2014 |
| Stetson Wind II | Washington | 26 MW | 1 | 2010 |
| Canton Mountain Wind | Oxford | 23 MW | 1 | 2017 |
| Silver Maple | Penobscot | 20 MW | 1 | 2022 |
| Spruce Mountain WInd | Oxford | 20 MW | 1 | 2011 |
| RoxWind | Oxford | 15 MW | 1 | 2021 |
| Pisgah Mountain Wind | Penobscot | 9.1 MW | 1 | 2016 |
| Beaver Ridge Wind | Waldo | 4.5 MW | 1 | 2008 |
| Fox Island Wind LLC | Knox | 4.5 MW | 1 | 2009 |
Solar177 plants · 968 MW
All US solar plants →| Plant | County | Capacity | Units | Online |
|---|---|---|---|---|
| Three Corners Solar | Waldo | 110 MW | 1 | 2024 |
| Farmington Solar | Franklin | 77 MW | 1 | 2021 |
| Sanford Solar | York | 49 MW | 1 | 2020 |
| Milo PV - BD Solar 1 LLC | Piscataquis | 20 MW | 1 | 2021 |
| Mousam River Solar | York | 20 MW | 1 | 2025 |
| Walden Solar Maine V | Androscoggin | 20 MW | 1 | 2024 |
| Pittsfield Solar LLC | Somerset | 9.9 MW | 1 | 2017 |
| Oxford PV - BD Solar Oxford LLC | Oxford | 9.2 MW | 1 | 2021 |
| Augusta PV - BD Solar Augusta LLC | Kennebec | 7.2 MW | 1 | 2021 |
| BD Solar Ellsworth LLC | Hancock | 7.0 MW | 1 | 2022 |
| BD Solar Hancock LLC | Hancock | 7.0 MW | 1 | 2022 |
| Winslow PV - BD Solar 2 LLC | Kennebec | 7.0 MW | 1 | 2022 |
| AES Daigle Solar, LLC | Aroostook | 5.0 MW | 1 | 2023 |
| Athens AT01 | Somerset | 5.0 MW | 1 | 2022 |
| BNRG Masardis (CSG) | Aroostook | 5.0 MW | 1 | 2024 |
| BWC Beech Ridge Brook, LLC | Cumberland | 5.0 MW | 1 | 2023 |
| BWC Jimmie Pond | Penobscot | 5.0 MW | 1 | 2025 |
| Baldwin (ME) | Cumberland | 5.0 MW | 1 | 2022 |
| Bates College Skowhegan | Somerset | 5.0 MW | 1 | 2023 |
| Brewer (CSG) | Penobscot | 5.0 MW | 1 | 2024 |
| Brewer PV, LLC | Penobscot | 5.0 MW | 1 | 2024 |
| Caribou Solar | Aroostook | 5.0 MW | 1 | 2024 |
| Cenergy - Pulk | Androscoggin | 5.0 MW | 1 | 2024 |
| Cenergy - Waterville (CSG) | Kennebec | 5.0 MW | 1 | 2023 |
| Cenergy - Wiscasset (CSG) | Lincoln | 5.0 MW | 1 | 2023 |
| Dynamic Corinth (CSG) | Penobscot | 5.0 MW | 1 | 2022 |
| Dynamic Madison (CSG) | Somerset | 5.0 MW | 1 | 2022 |
| Fairfield PV - BD Solar Fairfield LLC | Somerset | 5.0 MW | 1 | 2021 |
| Fort Fairfield | Aroostook | 5.0 MW | 1 | 2023 |
| Gorham Solar 1 (CSG) | Cumberland | 5.0 MW | 1 | 2023 |
| Hermon Solar, LLC | Penobscot | 5.0 MW | 1 | 2022 |
| Larson | Cumberland | 5.0 MW | 1 | 2024 |
| MD - EDFR - Phase II - Lewiston | Androscoggin | 5.0 MW | 1 | 2024 |
| ME - EDF - Phase II - Belfast | Waldo | 5.0 MW | 1 | 2024 |
| ME - EDFR - Phase I - Bristol | Lincoln | 5.0 MW | 1 | 2023 |
| ME Novel Lighthouse - Carrabassett | Franklin | 5.0 MW | 1 | 2023 |
| ME-EDFR-Phase I-Embden | Somerset | 5.0 MW | 1 | 2023 |
| ME-EDFR-Phase I-Woolwich | Sagadahoc | 5.0 MW | 1 | 2023 |
| MEVS Clark LLC | Somerset | 5.0 MW | 1 | 2023 |
| Monmouth | Kennebec | 5.0 MW | 1 | 2022 |
| North Bridgton | Cumberland | 5.0 MW | 1 | 2022 |
| Oakland | Kennebec | 5.0 MW | 1 | 2022 |
| Our Katahdin | Penobscot | 5.0 MW | 1 | 2024 |
| Palmyra PV - BD Solar Palmyra LLC | Somerset | 5.0 MW | 1 | 2022 |
| Penobscot Narrows Solar I | Hancock | 5.0 MW | 1 | 2024 |
| Quarry | York | 5.0 MW | 1 | 2022 |
| REDP - Trenton | Hancock | 5.0 MW | 1 | 2025 |
| River Road | Somerset | 5.0 MW | 1 | 2022 |
| Ryans Ranch | Oxford | 5.0 MW | 1 | 2022 |
| Sanford CGA | York | 5.0 MW | 1 | 2024 |
| Shaker | Cumberland | 5.0 MW | 1 | 2022 |
| Somerset Solar, LLC (ME) | Somerset | 5.0 MW | 1 | 2022 |
| South Paris PV, LLC | Oxford | 5.0 MW | 1 | 2024 |
| Standish | Cumberland | 5.0 MW | 1 | 2023 |
| Town House | Kennebec | 5.0 MW | 1 | 2022 |
| Unity Solar | Waldo | 5.0 MW | 1 | 2021 |
| Water Street Solar | Kennebec | 5.0 MW | 1 | 2022 |
| Arctaris Saddleback Solar | Franklin | 4.9 MW | 1 | 2023 |
| Broadhead | Kennebec | 4.9 MW | 1 | 2023 |
| Caterpillar Hill | Hancock | 4.9 MW | 1 | 2023 |
| Dublin Street LLC | Washington | 4.9 MW | 1 | 2024 |
| Dynamic - Enfield Hammett Road CSG | Penobscot | 4.9 MW | 1 | 2024 |
| Dynamic - Glenburn Broadway One (CSG) | Penobscot | 4.9 MW | 1 | 2024 |
| Dynamic - Gray Solar | Cumberland | 4.9 MW | 1 | 2024 |
| Dynamic - Leeds Solar (CSG) | Androscoggin | 4.9 MW | 1 | 2024 |
| Dynamic - Norridgewock Martin Stream (CSG) | Somerset | 4.9 MW | 1 | 2024 |
| Farmingdale FA01 | Kennebec | 4.9 MW | 1 | 2022 |
| Farmington | Franklin | 4.9 MW | 1 | 2023 |
| Fryeburg | Oxford | 4.9 MW | 1 | 2023 |
| Harmony Solar (ME) | Somerset | 4.9 MW | 1 | 2022 |
| Lewiston Junction Road Solar | Androscoggin | 4.9 MW | 1 | 2022 |
| Lincoln ME 1 | Penobscot | 4.9 MW | 1 | 2024 |
| Pittsfield Solar (N. Main St) | Somerset | 4.9 MW | 1 | 2023 |
| SCS Harpswell 012903 Brunswick, LLC | Cumberland | 4.9 MW | 1 | 2022 |
| SP-231 Clifton | Penobscot | 4.9 MW | 1 | 2024 |
| Sabattus SB01 | Androscoggin | 4.9 MW | 1 | 2023 |
| Sanford -NY | York | 4.9 MW | 1 | 2024 |
| Waterboro | York | 4.9 MW | 1 | 2023 |
| Wymans Deblois | Washington | 4.9 MW | 1 | 2024 |
| Perkins Road Belfast Solar, LLC | Waldo | 4.8 MW | 1 | 2021 |
| Wells (ME) | York | 4.8 MW | 1 | 2022 |
| Broadway Solar (CSG) | Penobscot | 4.6 MW | 1 | 2023 |
| Corkwood Solar (CSG) | Penobscot | 4.6 MW | 1 | 2023 |
| Merrill Road Solar | Androscoggin | 4.6 MW | 1 | 2022 |
| Webb Road Solar | Kennebec | 4.6 MW | 1 | 2022 |
| BWC Unity Pond LLC | Kennebec | 4.5 MW | 1 | 2023 |
| Dynamic - Wales Leeds Junction Road (CSG) | Androscoggin | 4.5 MW | 1 | 2024 |
| Milo CSG | Piscataquis | 4.5 MW | 1 | 2022 |
| Route 3 China Solar, LLC | Kennebec | 4.5 MW | 1 | 2022 |
| Treasure Lane Solar 1 | Kennebec | 4.5 MW | 1 | 2023 |
| Barefoot Solar | Somerset | 4.3 MW | 1 | 2022 |
| Caribou | Aroostook | 4.1 MW | 1 | 2023 |
| IOS - MEW Phase 1 | Somerset | 4.1 MW | 1 | 2017 |
| Loring | Aroostook | 4.1 MW | 1 | 2023 |
| Winslow PV, LLC | Kennebec | 4.1 MW | 1 | 2024 |
| AES Pelletier Solar, LLC | Aroostook | 4.0 MW | 1 | 2023 |
| Dairy Farm | Somerset | 4.0 MW | 1 | 2024 |
| Dynamic - Exeter Solar CSG | Penobscot | 4.0 MW | 1 | 2024 |
| Gardiner A, LLC | Kennebec | 4.0 MW | 1 | 2023 |
| Gateway Solar, LLC | Penobscot | 4.0 MW | 1 | 2024 |
| Hartland Solar | Somerset | 4.0 MW | 1 | 2021 |
| ISM Solar Shepherd Acres | Oxford | 4.0 MW | 1 | 2024 |
| Limestone - (ME) | Aroostook | 4.0 MW | 1 | 2024 |
| Madawaska Solar | Aroostook | 4.0 MW | 1 | 2024 |
| Mainely Solar (Wyman Hill Solar LLC) | Oxford | 4.0 MW | 1 | 2022 |
| Nutting Ridge Solar, LLC | Oxford | 4.0 MW | 1 | 2023 |
| Searsmont Road Lincolnville Solar, LLC | Waldo | 4.0 MW | 1 | 2022 |
| Washington WS01 | Knox | 4.0 MW | 1 | 2022 |
| Knights Pond Solar, LLC | York | 3.9 MW | 1 | 2023 |
| RE Gardiner Solar, LLC | Kennebec | 3.9 MW | 1 | 2023 |
| Augusta Road Bowdoin Solar, LLC | Sagadahoc | 3.8 MW | 1 | 2022 |
| Church Hill Road Augusta Solar, LLC | Kennebec | 3.8 MW | 1 | 2022 |
| Lebanon CSG LLC | York | 3.8 MW | 1 | 2024 |
| Limestone CSG 1 LLC | Aroostook | 3.8 MW | 1 | 2024 |
| 15 Glen Harris RD | Franklin | 3.6 MW | 1 | 2024 |
| Acton | York | 3.5 MW | 1 | 2021 |
| BWC Maces Pond LLC | Knox | 3.5 MW | 1 | 2021 |
| Berwick Hubbard Solar 1 | York | 3.5 MW | 1 | 2024 |
| BRNG Nicolin (CSG) | Hancock | 3.3 MW | 1 | 2024 |
| Chester A, LLC | Franklin | 3.3 MW | 1 | 2024 |
| Easton CSG 1 LLC | Aroostook | 3.3 MW | 1 | 2024 |
| Livermore Falls CSG | Androscoggin | 3.3 MW | 1 | 2022 |
| Market Street Gardiner Solar, LLC | Kennebec | 3.3 MW | 1 | 2022 |
| Vassalboro PV, LLC | Kennebec | 3.3 MW | 1 | 2024 |
| ME Novel Lighthouse - Front St. Solar CS | Somerset | 3.2 MW | 1 | 2023 |
| Valley Sun Solar | Aroostook | 3.1 MW | 1 | 2024 |
| Canton GLC Solar, LLC | Oxford | 3.0 MW | 1 | 2024 |
| ME Novel Lighthouse - Penobscot CSG | Penobscot | 3.0 MW | 1 | 2024 |
| Mechanic Street (CSG) | Aroostook | 3.0 MW | 1 | 2024 |
| Missile Street (CSG) | Aroostook | 3.0 MW | 1 | 2024 |
| NRS Bethel Solar, LLC | Oxford | 3.0 MW | 1 | 2022 |
| Pleasant Street | Franklin | 3.0 MW | 1 | 2023 |
| Rangeley | Franklin | 3.0 MW | 1 | 2024 |
| Sheridan Road Solar Farm | Aroostook | 3.0 MW | 1 | 2024 |
| Athens Ridge | Somerset | 2.9 MW | 1 | 2024 |
| Limestone CSG 2 LLC | Aroostook | 2.9 MW | 1 | 2024 |
| ME Fort Fairfield Solar Plant | Aroostook | 2.8 MW | 1 | 2024 |
| Mars Hill | Aroostook | 2.6 MW | 1 | 2024 |
| Augusta | Kennebec | 2.5 MW | 1 | 2022 |
| Belfast PV, LLC | Waldo | 2.5 MW | 1 | 2024 |
| French Road Solar | Aroostook | 2.5 MW | 1 | 2024 |
| ME - Novel (Lighthouse Ph I) Mars Hill | Aroostook | 2.5 MW | 1 | 2024 |
| ME Novel Lighthouse - Huggard Ave Solar | Aroostook | 2.5 MW | 1 | 2024 |
| North Nobleboro Road, LLC | Lincoln | 2.5 MW | 1 | 2021 |
| Skyway Avenue Solar Farm | Aroostook | 2.5 MW | 1 | 2024 |
| MEVS DOT 109 | Kennebec | 2.2 MW | 2 | 2023 |
| RE Sidney Solar, LLC | Kennebec | 2.1 MW | 1 | 2022 |
| BNRG Norridgewock (CSG) | Somerset | 2.0 MW | 1 | 2024 |
| BNRG North Anson (CSG) | Somerset | 2.0 MW | 1 | 2024 |
| Crowley Solar, LLC | Androscoggin | 2.0 MW | 1 | 2024 |
| Houlton Road Solar Farm (CSG) | Aroostook | 2.0 MW | 1 | 2024 |
| Lebanon West Lebanon Solar 1 | York | 2.0 MW | 1 | 2024 |
| Lisbon Street Solar | Androscoggin | 2.0 MW | 1 | 2022 |
| ME CDG 004 | Penobscot | 2.0 MW | 1 | 2024 |
| ME CDG 005 | Penobscot | 2.0 MW | 1 | 2024 |
| MEVS Waterhouse | Cumberland | 2.0 MW | 1 | 2024 |
| Marshfield Solar, LLC | Washington | 2.0 MW | 1 | 2024 |
| Maxcy's Mill Solar, LLC | Kennebec | 2.0 MW | 1 | 2022 |
| Naples | Cumberland | 2.0 MW | 1 | 2021 |
| Samoset Solar | Knox | 2.0 MW | 1 | 2023 |
| Union Street Solar, LLC | Penobscot | 2.0 MW | 1 | 2024 |
| Waldoboro Solar, LLC | Knox | 2.0 MW | 1 | 2023 |
| Richmond Hill | Sagadahoc | 1.8 MW | 1 | 2023 |
| Mariaville Road Elsworth Solar, LLC | Hancock | 1.6 MW | 1 | 2022 |
| Oxford Solar, LLC | Oxford | 1.6 MW | 1 | 2024 |
| Sidney | Kennebec | 1.5 MW | 1 | 2023 |
| Solar Mule, LLC | Kennebec | 1.5 MW | 1 | 2017 |
| Boundary Line Solar, LLC | Cumberland | 1.0 MW | 1 | 2025 |
| Cenergy - Kiger | Somerset | 1.0 MW | 1 | 2023 |
| Cenergy - Richards (CSG) | Somerset | 1.0 MW | 1 | 2023 |
| Lisbon CSG LLC | Androscoggin | 1.0 MW | 1 | 2025 |
| ME Augusta 13 York Farm Rd Solar | Kennebec | 1.0 MW | 1 | 2024 |
| Roosevelt Trail | Cumberland | 1.0 MW | 1 | 2024 |
| SP-339 Mechanic Falls | Oxford | 1.0 MW | 1 | 2024 |
| Turner CSG LLC | Androscoggin | 1.0 MW | 1 | 2025 |
| USS Weld Solar LLC | Franklin | 1.0 MW | 1 | 2025 |
| Water Line Solar, LLC | Cumberland | 1.0 MW | 1 | 2025 |
Hydro49 plants · 770 MW
All US hydro plants →| Plant | County | Capacity | Units | Online |
|---|---|---|---|---|
| Great Lakes Hydro America - ME | Penobscot | 158 MW | 33 | 1917 |
| Harris Hydro | Somerset | 76 MW | 4 | 1954 |
| Wyman Hydro | Somerset | 72 MW | 3 | 1930 |
| S D Warren Westbrook | Cumberland | 70 MW | 16 | 1903 |
| Rumford Falls Hydro Facility | Oxford | 53 MW | 7 | 1918 |
| Anson Abenaki Hydros | Somerset | 29 MW | 13 | 1950 |
| Charles E Monty | Androscoggin | 28 MW | 2 | 1990 |
| Brunswick Hydro | Cumberland | 20 MW | 3 | 1982 |
| Worumbo Hydro Station | Androscoggin | 19 MW | 2 | 1989 |
| Gulf Island | Androscoggin | 19 MW | 3 | 1926 |
| Skelton | York | 17 MW | 2 | 1948 |
| Hydro Kennebec Project | Kennebec | 15 MW | 2 | 1989 |
| Pejepscot Hydroelectric Project | Sagadahoc | 14 MW | 4 | 1987 |
| West Enfield Hydro | Penobscot | 13 MW | 2 | 1988 |
| Williams Hydro | Somerset | 13 MW | 2 | 1939 |
| Weston Hydro | Somerset | 12 MW | 4 | 1920 |
| Hiram | Cumberland | 11 MW | 2 | 1917 |
| Otis Hydro | Franklin | 10 MW | 2 | 1985 |
| International Paper Livermore Hydro | Androscoggin | 9.2 MW | 9 | 1910 |
| Ellsworth Hydro Station | Hancock | 8.9 MW | 4 | 1924 |
| Shawmut | Somerset | 8.8 MW | 8 | 1913 |
| Milford Hydro Station | Penobscot | 7.8 MW | 6 | 1941 |
| West Buxton | York | 7.7 MW | 6 | 1904 |
| Lockwood Hydroelectric Facility | Kennebec | 7.2 MW | 7 | 1985 |
| Aziscohos Hydroelectric Project | Oxford | 6.7 MW | 1 | 1988 |
| Cataract Hydro | York | 6.6 MW | 1 | 1937 |
| International Paper Riley Hydro | Franklin | 6.6 MW | 6 | 1981 |
| Deer Rips | Androscoggin | 6.5 MW | 7 | 1903 |
| Benton Falls Associates | Kennebec | 4.2 MW | 2 | 1987 |
| Medway Hydro | Penobscot | 4.0 MW | 5 | 1923 |
| Orono B | Penobscot | 3.9 MW | 3 | 2013 |
| Brassua Hydroelectric Project | Somerset | 3.6 MW | 1 | 1989 |
| International Paper Jay Hydro | Franklin | 3.1 MW | 6 | 1912 |
| Messalonskee 2 (Oakland) | Kennebec | 2.8 MW | 1 | 1924 |
| Orono Hydro Station | Penobscot | 2.7 MW | 4 | 2009 |
| Stillwater B | Penobscot | 2.4 MW | 3 | 2013 |
| North Gorham | Cumberland | 2.2 MW | 2 | 1925 |
| Messalonskee 5 | Kennebec | 1.8 MW | 1 | 1935 |
| Stillwater Hydro Station | Penobscot | 1.8 MW | 4 | 1913 |
| Messalonskee 3 | Kennebec | 1.6 MW | 1 | 1918 |
| Upper Androscoggin | Androscoggin | 1.6 MW | 3 | 1920 |
| Barker Lower | Androscoggin | 1.5 MW | 1 | 1986 |
| Squa Pan Hydro Station | Aroostook | 1.5 MW | 1 | 1941 |
| Mechanic Falls | Androscoggin | 1.4 MW | 2 | 1986 |
| Salmon Falls | York | 1.2 MW | 3 | 1986 |
| Pittsfield Hydro | Somerset | 1.1 MW | 3 | 1986 |
| Gardiner | Kennebec | 1.0 MW | 1 | 1985 |
| Pumpkin Hill | Penobscot | 1.0 MW | 1 | 1987 |
| Upper Barker | Androscoggin | 1.0 MW | 1 | 1987 |
Battery storage5 plants · 202 MW
All US battery storage plants →| Plant | County | Capacity | Units | Online |
|---|---|---|---|---|
| Cross Town Energy Storage | Cumberland | 175 MW | 1 | 2025 |
| Bonny Eagle | York | 15 MW | 7 | 1910 |
| Madison ESS | Somerset | 4.9 MW | 1 | 2019 |
| Rumford ESS | Oxford | 4.9 MW | 1 | 2021 |
| Madison BTM | Somerset | 1.5 MW | 1 | 2020 |
Sorted by nameplate capacity within each fuel. “Online” is the year the plant’s earliest surviving unit entered service.
Frequently asked questions
›How many power plants are there in Maine?
Maine has 276 operable power plants with a combined nameplate capacity of 6.2 GW, the 44th largest generating fleet of the 50 states and DC. 274 of them are currently in service.
›What is the largest power plant in Maine?
William F Wyman Hybrid in Cumberland County, a other plant with 863 MW of capacity across 5 generating units, first online in January 1957.
›What fuel do Maine's power plants use?
Natural gas accounts for the largest share of Maine's generating capacity — 1,579 MW, or 25.6% of the total, across 5 plants. Other follows at 23.3%, Wind follows at 19.7%, Solar follows at 15.7%. Note this is capacity, not generation — what the fleet could produce, not what it did.
›What is the oldest power plant in Maine?
S D Warren Westbrook is the oldest still operable, with its earliest unit entering service in January 1903. The most recent addition is USS Weld Solar LLC, online since December 2025.