Mars Hill Wind Farm Project
Aroostook County, Maine · EIA plant ID 56448 · Operator: First Wind O&M, LLC
Nameplate42MWSummer 42 MW
Generators1in service
Net generation128GWh12 mo to Dec 2025
Capacity factor35%wind units, summer MW
Heat rate—thermal plants only
First online2007
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), wind 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.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2007 | 99.1 | 32.1% | — |
| 2008 | 131.6 | 35.7% | — |
| 2009 | 121.1 | 32.9% | — |
| 2010 | 120.7 | 32.8% | — |
| 2011 | 127.6 | 34.7% | — |
| 2012 | 133.1 | 36.1% | — |
| 2013 | 136.1 | 37.0% | — |
| 2014 | 132.6 | 36.0% | — |
| 2015 | 141.9 | 38.6% | — |
| 2016 | 131.8 | 35.7% | — |
| 2017 | 134.6 | 36.6% | — |
| 2018 | 140.8 | 38.3% | — |
| 2019 | 139.3 | 37.9% | — |
| 2020 | 132.4 | 35.9% | — |
| 2021 | 115.9 | 31.5% | — |
| 2022 | 130.6 | 35.5% | — |
| 2023 | 104.8 | 28.5% | — |
| 2024 | 118.9 | 32.2% | — |
| 2025 | 128.3 | 34.9% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 1 | Onshore Wind Turbine | WT | 42 | 42 | Mar 2007 | Operating | — | ge 1.5 SLE |
Owner / operator
Operator: First Wind O&M, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| First Wind O&M, LLC | 100.0% | 42 MW |
Nearby plants
Within 80 km.
| Mars Hill | 3 MW | 6.3 km |
| ME - Novel (Lighthouse Ph I) Mars Hill | 3 MW | 8.3 km |
| Easton CSG 1 LLC | 3 MW | 13.3 km |
| ME Fort Fairfield Solar Plant | 3 MW | 20.6 km |
| Mechanic Street (CSG) | 3 MW | 23.3 km |
| Houlton Road Solar Farm (CSG) | 2 MW | 24 km |