Somerset Plant
Somerset County, Maine · EIA plant ID 50406 · Operator: Sappi Fine Paper North America-Somerset
Nameplate107MWSummer 100 MW
Generators2in service
Net generation577GWh12 mo to Aug 2026
Capacity factor55%other units, summer MW
Heat rate4,780Btu/kWhfossil units, electric fuel, HHV
First online1976
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), other units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 726.3 | 54.2% | 14,747 |
| 2002 | 833.3 | 64.4% | 10,470 |
| 2003 | 0 | 0.0% | — |
| 2004 | 748.6 | 57.5% | 5,705 |
| 2005 | 757.2 | 59.6% | 5,534 |
| 2006 | 746.1 | 59.8% | 5,705 |
| 2007 | 742.1 | 61.7% | 5,705 |
| 2008 | 672.2 | 57.4% | 5,500 |
| 2009 | 583.7 | 53.4% | 5,534 |
| 2010 | 575.7 | 54.2% | 5,483 |
| 2011 | 621.4 | 58.5% | 5,498 |
| 2012 | 619.7 | 59.0% | 5,514 |
| 2013 | 567 | 54.9% | 5,719 |
| 2014 | 584.9 | 56.3% | 5,501 |
| 2015 | 510.3 | 49.2% | 5,498 |
| 2016 | 507.8 | 52.6% | 4,753 |
| 2017 | 526.5 | 56.1% | 4,777 |
| 2018 | 538.8 | 57.1% | 4,794 |
| 2019 | 531.7 | 56.2% | 4,786 |
| 2020 | 526.5 | 54.2% | 4,781 |
| 2021 | 560.2 | 60.9% | 4,791 |
| 2022 | 514.7 | 55.1% | 4,788 |
| 2023 | 485.4 | 51.5% | 4,793 |
| 2024 | 527.2 | 54.7% | 4,792 |
| 2025 | 552.1 | 56.1% | 4,777 |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| GEN1 | Wood/Wood Waste Biomass | ST | 45.9 | 48.8 | Jan 1976 | Operating | — | coming soon |
| GEN2 | Wood/Wood Waste Biomass | ST | 61.2 | 51 | Oct 1990 | Operating | — | coming soon |
Owner / operator
Operator: Sappi Fine Paper North America-Somerset. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Sappi Fine Paper North America-Somerset | 100.0% | 107 MW |
Nearby plants
Within 80 km.
| Bates College Skowhegan | 5 MW | 6.1 km |
| Cenergy - Richards (CSG) | 1 MW | 7.4 km |
| Fairfield PV - BD Solar Fairfield LLC | 5 MW | 8.7 km |
| Weston Hydro | 12 MW | 8.7 km |
| ME Novel Lighthouse - Front St. Solar CS | 3 MW | 9 km |
| Shawmut | 9 MW | 9.7 km |