Directory of Power Plants in Maine
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Water Street Solar | AES Distributed Energy | Randolph, ME | ISO New England (ISNE) | 5.8 GWh | Nov 2022 | Dec 2023 | Solar |
| Richmond Hill | Greenbacker Renewable Energy Corporation | Richmond, ME | ISO New England (ISNE) | 16.0 MWh | Nov 2023 | Dec 2023 | Solar |
| BWC Maces Pond LLC | Navisun LLC | Rockport, ME | ISO New England (ISNE) | 4.4 GWh | Nov 2021 | Dec 2023 | Solar |
| Samoset Solar | Samoset Solar, LLC | Rockport, ME | ISO New England (ISNE) | 1.8 GWh | Jun 2023 | Dec 2023 | Solar |
| Brassua Hydroelectric Project | Brassua Hydroelectric LP | Rockwood, ME | ISO New England (ISNE) | 19.9 GWh | Aug 1989 | Dec 2023 | Water |
| RoxWind | RoxWind LLC | Roxbury, ME | ISO New England (ISNE) | 10.4 GWh | Oct 2021 | Dec 2023 | Wind |
| Record Hill Wind | Record Hill Wind LLC | Roxbury, ME | ISO New England (ISNE) | 110.9 GWh | Dec 2011 | Dec 2023 | Wind |
| Rumford Falls Hydro Facility | Brookfield Power New England | Rumford, ME | ISO New England (ISNE) | 290.2 GWh | Dec 1917 | Dec 2023 | Water |
| Mainely Solar (Wyman Hill Solar LLC) | Wyman Hill Solar, LLC | Rumford, ME | ISO New England (ISNE) | 3.9 GWh | Nov 2022 | Dec 2023 | Solar |
| Rumford Power LLC | Rumford Power | Rumford, ME | ISO New England (ISNE) | 403.4 GWh | Jun 2000 | Dec 2023 | Natural Gas |
| Rumford Cogeneration | ND Paper, Inc. | Rumford, ME | ISO New England (ISNE) | 430.2 GWh | Dec 1989 | Mar 2025 | Black Liquor : 53.8% Tire-derived Fuels : 22.8% Wood/Wood Waste Solids : 11.8% Bituminous Coal : 7.4% Residual Fuel Oil : 3.1% Sludge Waste : 1.0% |
| Cataract Hydro | Brookfield White Pine Hydro LLC | Saco, ME | ISO New England (ISNE) | 2.0 GWh | Dec 1936 | Dec 2023 | Water |
| Sanford Solar | Sanford Airport Solar, LLC | Sanford, ME | ISO New England (ISNE) | 87.6 GWh | Oct 2020 | Mar 2025 | Solar |
| BWC Beech Ridge Brook, LLC | Navisun LLC | Scarborough, ME | ISO New England (ISNE) | 4.7 GWh | Apr 2023 | Dec 2023 | Solar |
| Robbins Lumber | Robbins Lumber Inc | Searsmont, ME | ISO New England (ISNE) | 97.0 MWh | Dec 1980 | Dec 2023 | Distillate Fuel Oil |
| Georges River Energy | Robbins Lumber Inc | Searsmont, ME | ISO New England (ISNE) | 40.3 GWh | Nov 2018 | Dec 2023 | Wood/Wood Waste Solids |
| Caterpillar Hill | AES Clean Energy | Sedgwick, ME | ISO New England (ISNE) | 235.0 MWh | Nov 2023 | Dec 2023 | Solar |
| Shawmut | Brookfield White Pine Hydro LLC | Shawmut, ME | ISO New England (ISNE) | 36.7 GWh | Dec 1912 | Dec 2023 | Water |
| Sidney | Nautilus Solar Solutions | Sidney, ME | ISO New England (ISNE) | 1.4 GWh | Apr 2023 | Dec 2023 | Solar |
| Weston Hydro | Brookfield White Pine Hydro LLC | Skowhegan, ME | ISO New England (ISNE) | 88.4 GWh | Dec 1919 | Dec 2023 | Water |
| Somerset Plant | Sappi Fine Paper North America-Somerset | Skowhegan, ME | ISO New England (ISNE) | 533.7 GWh | Dec 1975 | Mar 2025 | Black Liquor : 46.9% Wood/Wood Waste Solids : 36.7% Tire-derived Fuels : 6.3% Natural Gas : 6.3% Residual Fuel Oil : 2.7% Sludge Waste : 1.0% |
| ME Novel Lighthouse - Front St. Solar CSG | Luminace Sunbeam Development Holdings, LLC | Skowhegan, ME | ISO New England (ISNE) | 1.4 GWh | Apr 2023 | Dec 2023 | Solar |
| Williams Hydro | Brookfield White Pine Hydro LLC | Solon, ME | ISO New England (ISNE) | 97.2 GWh | Dec 1938 | Dec 2023 | Water |
| Salmon Falls | Green Mountain Power Corp | South Berwick, ME | ISO New England (ISNE) | 4.9 GWh | Jun 1986 | Dec 2023 | Water |
| Standish | Nautilus Solar Solutions | Standish, ME | ISO New England (ISNE) | 535.0 MWh | Sep 2023 | Dec 2023 | Solar |
| Stillwater Hydro Station | Brookfield Black Bear Hydro, LLC | Stillwater, ME | ISO New England (ISNE) | 12.1 GWh | Dec 1912 | Dec 2023 | Water |
| ReEnergy Stratton LLC | ReEnergy Stratton LLC | Stratton, ME | ISO New England (ISNE) | 177.1 GWh | Oct 1989 | Dec 2023 | Wood/Wood Waste Solids |
| Hancock Wind Plant | Onward Energy | T22 MD, ME | ISO New England (ISNE) | 118.4 GWh | Nov 2016 | Mar 2025 | Wind |
| Pejepscot Hydroelectric Project | Topsham Hydro Partners | Topsham, ME | ISO New England (ISNE) | 70.6 GWh | Oct 1987 | Dec 2023 | Water |
| Weaver Wind | Weaver Wind, LLC (Longroad) | Township 16, ME | ISO New England (ISNE) | 212.1 GWh | Nov 2020 | Mar 2025 | Wind |
| Three Corners Solar | Three Corners Solar, LLC | Unity, ME | ISO New England (ISNE) | 133.1 GWh | - | Mar 2025 | Solar |
| Unity Solar | Madison Energy Holdings LLC | Unity, ME | ISO New England (ISNE) | 7.3 GWh | Nov 2021 | Dec 2023 | Solar |
| Maine Independence Station | Casco Bay Energy Co LLC | Veazie, ME | ISO New England (ISNE) | 936.9 GWh | Apr 2000 | Dec 2023 | Natural Gas |
| Fox Island Wind LLC | Fox Island Wind LLC | Vinalhaven, ME | ISO New England (ISNE) | 5.7 GWh | Oct 2009 | Dec 2023 | Wind |
| Downeast Wind | Downeast Wind, LLC | Washington County, ME | 31.0 GWh | - | Mar 2025 | Wind | |
| Washington WS01 | Nautilus Solar Solutions | Washington, ME | ISO New England (ISNE) | 5.5 GWh | May 2022 | Dec 2023 | Solar |
| Cenergy - Waterville (CSG) | Luminace Sunbeam Development Holdings, LLC | Waterville, ME | ISO New England (ISNE) | 1.8 GWh | Jun 2023 | Dec 2023 | Solar |
| Webb Road Solar | NextGrid Mastic, LLC | Waterville, ME | ISO New England (ISNE) | 4.7 GWh | Aug 2022 | Dec 2023 | Solar |
| Lockwood Hydroelectric Facility | Merimil Ltd Partnership | Waterville, ME | ISO New England (ISNE) | 23.7 GWh | Sep 1985 | Dec 2023 | Water |
| Messalonskee 5 | Messalonskee Stream Hydro LLC | Waterville, ME | ISO New England (ISNE) | 5.1 GWh | Dec 1934 | Dec 2023 | Water |
| Wells (ME) | Nautilus Solar Solutions | Wells, ME | ISO New England (ISNE) | 8.3 GWh | Jun 2022 | Dec 2023 | Solar |
| Baldwin | Maine DG Solar Baldwin, LLC | West Baldwin, ME | ISO New England (ISNE) | 9.0 GWh | Feb 2022 | Dec 2023 | Solar |
| West Enfield Hydro | Brookfield Black Bear Hydro, LLC | West Enfield, ME | ISO New England (ISNE) | 100.4 GWh | Mar 1988 | Dec 2023 | Water |
| Indeck West Enfield Energy Center | Stored Solar J&WE | West Enfield, ME | ISO New England (ISNE) | 13.5 GWh | Nov 1987 | Dec 2023 | Wood/Wood Waste Solids : 99.7% |
| Harris Hydro | Brookfield White Pine Hydro LLC | West Forks, ME | ISO New England (ISNE) | 277.6 GWh | Dec 1953 | Dec 2023 | Water |
| Westbrook Energy Center Power Plant | Westbrook Energy Center | Westbrook, ME | ISO New England (ISNE) | 3.0 TWh | Apr 2001 | Mar 2025 | Natural Gas |
| S D Warren Westbrook | Elevate Power Management LLC | Westbrook, ME | ISO New England (ISNE) | 32.7 GWh | Dec 1902 | Dec 2023 | Water |
| Aziscohos Hydroelectric Project | Brookfield White Pine Hydro LLC | Wilson Mills, ME | ISO New England (ISNE) | 38.7 GWh | May 1988 | Dec 2023 | Water |
| Pleasant Street | Greenbacker Renewable Energy Corporation | Wilton, ME | ISO New England (ISNE) | 98.0 MWh | Nov 2023 | Dec 2023 | Solar |
| Rollins Wind Project | Evergreen Wind, LLC | Winn Village, ME | ISO New England (ISNE) | 132.2 GWh | Jun 2011 | Dec 2023 | Wind |
| Winslow PV - BD Solar 2 LLC | BD Solar 2 LLC | Winslow, ME | ISO New England (ISNE) | 10.9 GWh | Jun 2022 | Dec 2023 | Solar |
| Hydro Kennebec Project | Hydro Kennebec LLC | Winslow, ME | ISO New England (ISNE) | 69.6 GWh | Dec 1988 | Dec 2023 | Water |
| Cenergy - Wiscasset (CSG) | Luminace Sunbeam Development Holdings, LLC | Wiscasset, ME | ISO New England (ISNE) | 2.5 GWh | Jun 2023 | Dec 2023 | Solar |
| ME-EDFR-Phase I-Woolwich | Green Mile Solar, LLC | Woolwich, ME | ISO New England (ISNE) | 1.5 GWh | Aug 2023 | Dec 2023 | Solar |
| William F Wyman Hybrid | FPL Energy Wyman LLC | Yarmouth, ME | ISO New England (ISNE) | 50.5 GWh | Dec 1956 | Mar 2025 | Residual Fuel Oil : 99.2% Distillate Fuel Oil : 0.8% |
Browse Power Plants By Maine Counties
Figures are based on March 2025 generation numbers.| County | State Rank | Active Plants | Mar 2025 Generation |
|---|---|---|---|
| Cumberland County, ME | # 1 | 20 | 3.4 TWh |
| Penobscot County, ME | # 2 | 43 | 2.3 TWh |
| Somerset County, ME | # 3 | 35 | 1.9 TWh |
| Oxford County, ME | # 4 | 18 | 1.4 TWh |
| Androscoggin County, ME | # 5 | 28 | 800.4 GWh |
| Franklin County, ME | # 6 | 16 | 778.3 GWh |
| Aroostook County, ME | # 7 | 26 | 570.8 GWh |
| Washington County, ME | # 8 | 8 | 549.9 GWh |
| County | State Rank | Active Plants | Mar 2025 Generation |
|---|---|---|---|
| Piscataquis County, ME | # 9 | 4 | 516.6 GWh |
| Hancock County, ME | # 10 | 13 | 463.3 GWh |
| York County, ME | # 11 | 19 | 325.5 GWh |
| Kennebec County, ME | # 12 | 24 | 214.5 GWh |
| Waldo County, ME | # 13 | 6 | 191.1 GWh |
| Sagadahoc County, ME | # 14 | 4 | 72.1 GWh |
| Knox County, ME | # 15 | 5 | 17.4 GWh |
| Lincoln County, ME | # 16 | 3 | 2.5 GWh |