Lockwood Hydroelectric Facility
Kennebec County, Maine · EIA plant ID 10066 · Operator: Merimil Ltd Partnership
Nameplate7MWSummer 6 MW
Generators7in service
Net generation13GWh12 mo to Dec 2025
Capacity factor23%hydro units, summer MW
Heat rate—thermal plants only
First online1985
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), hydro 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) |
|---|---|---|---|
| 2001 | 90.7 | 151.3% | — |
| 2002 | 32.1 | 99.1% | — |
| 2003 | 29.4 | 90.5% | — |
| 2004 | 32.2 | 99.0% | — |
| 2005 | 31.5 | 97.2% | — |
| 2006 | 42.2 | 130.1% | — |
| 2007 | 32.2 | 99.3% | — |
| 2008 | 34.1 | 60.7% | — |
| 2009 | 36 | 64.2% | — |
| 2010 | 32.4 | 57.7% | — |
| 2011 | 33.2 | 59.3% | — |
| 2012 | 37.4 | 66.5% | — |
| 2013 | 33.4 | 59.7% | — |
| 2014 | 30.5 | 54.4% | — |
| 2015 | 27.4 | 48.9% | — |
| 2016 | 30.6 | 54.5% | — |
| 2017 | 28 | 49.9% | — |
| 2018 | 27.6 | 49.2% | — |
| 2019 | 28.6 | 51.0% | — |
| 2020 | 27.2 | 48.4% | — |
| 2021 | 19.9 | 35.4% | — |
| 2022 | 19.9 | 35.5% | — |
| 2023 | 23.7 | 42.3% | — |
| 2024 | 13.6 | 24.1% | — |
| 2025 | 13 | 23.1% | — |
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 | Conventional Hydroelectric | HY | 0.8 | 0.7 | Oct 1985 | Operating | — | coming soon |
| GEN2 | Conventional Hydroelectric | HY | 0.8 | 0.7 | Oct 1985 | Operating | — | coming soon |
| GEN3 | Conventional Hydroelectric | HY | 0.8 | 0.7 | Oct 1985 | Operating | — | coming soon |
| GEN4 | Conventional Hydroelectric | HY | 0.8 | 0.7 | Oct 1985 | Operating | — | coming soon |
| GEN5 | Conventional Hydroelectric | HY | 0.8 | 0.7 | Oct 1985 | Operating | — | coming soon |
| GEN6 | Conventional Hydroelectric | HY | 0.8 | 0.7 | Oct 1985 | Operating | — | coming soon |
| GEN7 | Conventional Hydroelectric | HY | 2.4 | 2.2 | Oct 1988 | Operating | — | coming soon |
Owner / operator
Operator: Merimil Ltd Partnership. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Merimil Ltd Partnership | 100.0% | 7 MW |
Nearby plants
Within 80 km.
| Hydro Kennebec Project | 15 MW | 2 km |
| Messalonskee 5 | 2 MW | 2.3 km |
| Cenergy - Waterville (CSG) | 5 MW | 3.3 km |
| Winslow PV - BD Solar 2 LLC | 7 MW | 3.4 km |
| Solar Mule, LLC | 2 MW | 3.6 km |
| Winslow PV, LLC | 4 MW | 4.2 km |