Vergennes 9
Addison County, Vermont · EIA plant ID 6519 · Operator: Green Mountain Power Corp
×4 MW oil retired since 2020 (latest Sep 2021)
Nameplate2MWSummer 2 MW
Generators3in service
Net generation8GWh12 mo to Dec 2025
Capacity factor37%hydro units, summer MW
Heat rate—Btu/kWhfossil units, electric fuel, HHV
First online1912
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.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 7.2 | 33.9% | — |
| 2002 | 8.5 | 44.1% | — |
| 2003 | 9.9 | 44.8% | 9,588 |
| 2004 | 8.1 | 40.4% | 9,977 |
| 2005 | 7.3 | 35.5% | 10,982 |
| 2006 | 10.6 | 46.3% | 8,741 |
| 2007 | 8 | 34.1% | 10,087 |
| 2008 | 11 | 50.8% | 9,739 |
| 2009 | 11.9 | 56.1% | 11,553 |
| 2010 | 7.8 | 36.8% | 10,682 |
| 2011 | 10.1 | 47.2% | 10,376 |
| 2012 | 10.9 | 51.7% | 9,783 |
| 2013 | 13.9 | 64.6% | 10,145 |
| 2014 | 11.6 | 53.4% | 9,991 |
| 2015 | 9 | 42.6% | 11,100 |
| 2016 | 10.2 | 47.0% | 10,854 |
| 2017 | 11.4 | 51.8% | 10,426 |
| 2018 | 8.8 | 40.0% | 10,126 |
| 2019 | 5.9 | 27.9% | 9,207 |
| 2020 | 4.5 | 21.0% | 11,421 |
| 2021 | 11.7 | 55.2% | 10,313 |
| 2022 | 9.7 | 46.3% | — |
| 2023 | 12.4 | 58.9% | — |
| 2024 | 8 | 38.2% | — |
| 2025 | 7.7 | 36.6% | — |
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 | 0.7 | 0.7 | Jan 1912 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 0.7 | 0.7 | Jan 1912 | Operating | — | coming soon |
| 4 | Conventional Hydroelectric | HY | 1 | 1 | Jan 1943 | Operating | — | coming soon |
| 5 | Petroleum Liquids | IC | 2 | 2 | Nov 1963 | Retired Sep 2021 | — | coming soon |
| 6 | Petroleum Liquids | IC | 2 | 2 | Nov 1964 | Retired Sep 2021 | — | 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.
| Open View Solar Farm | 2 MW | 5.2 km |
| Panton | — | 5.7 km |
| Next Generation Solar Farm | 2 MW | 9.4 km |
| GMP Solar/Storage-Ferrisburgh Hybrid | 7 MW | 9.8 km |
| GMP Solar - Panton Hybrid | 6 MW | 10.2 km |
| Weybridge | 3 MW | 11.6 km |