Lower Middlebury
Addison County, Vermont · EIA plant ID 3716 · Operator: Green Mountain Power Corp
Nameplate2MWSummer 2 MW
Generators3in service
Net generation5GWh12 mo to Dec 2025
Capacity factor30%hydro units, summer MW
Heat rate—thermal plants only
First online1917
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 | 5.7 | 40.7% | — |
| 2002 | 6.6 | 16.8% | — |
| 2003 | 8.5 | 64.4% | — |
| 2004 | 7.7 | 58.8% | — |
| 2005 | 9.2 | 52.8% | — |
| 2006 | 10.9 | 62.3% | — |
| 2007 | 8.3 | 47.1% | — |
| 2008 | 9.1 | 51.9% | — |
| 2009 | 10.9 | 62.1% | — |
| 2010 | 9.1 | 51.9% | — |
| 2011 | 11.2 | 64.1% | — |
| 2012 | 8.1 | 46.2% | — |
| 2013 | 8 | 45.4% | — |
| 2014 | 6.7 | 38.3% | — |
| 2015 | 3.3 | 18.8% | — |
| 2016 | 5.4 | 31.0% | — |
| 2017 | 5.4 | 30.6% | — |
| 2018 | 6.8 | 38.8% | — |
| 2019 | 0 | 0.0% | — |
| 2020 | 2.1 | 11.7% | — |
| 2021 | 6.3 | 36.1% | — |
| 2022 | 5.9 | 33.7% | — |
| 2023 | 3.5 | 19.7% | — |
| 2024 | 4.3 | 24.3% | — |
| 2025 | 5.2 | 29.7% | — |
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 | Conventional Hydroelectric | HY | 0.8 | 0.6 | Aug 1917 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 0.8 | 0.6 | Aug 1917 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 0.8 | 0.8 | Aug 1917 | Operating | — | coming soon |
Owner / operator
Operator: Green Mountain Power Corp. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Green Mountain Power Corp | 100.0% | 2 MW |
Nearby plants
Within 80 km.
| Middlebury College | 1 MW | 1.9 km |
| Beldens | 6 MW | 3.1 km |
| South Street - Middlebury | 5 MW | 4.3 km |
| Huntington Falls | 6 MW | 5.3 km |
| Weybridge | 3 MW | 5.5 km |
| GMP Solar - Panton Hybrid | 6 MW | 6.9 km |