West Tisbury Generating FacilityRetired
Dukes County, Massachusetts · EIA plant ID 6049 · Operator: vineyard reliability llc
×5 MW oil retired since 2020 (latest Sep 2025)
Nameplate—MWSummer — MW
Generators0in service
Net generation—GWh12 mo
Capacity factor—no 923 generation in the last 12 months
Heat rate—Btu/kWhfossil units, electric fuel, HHV
First online—
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), primary-fuel 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 | 0.1 | 0.3% | 10,667 |
| 2002 | 1.2 | 2.5% | 10,263 |
| 2003 | 1.1 | 2.3% | 10,102 |
| 2004 | 0.1 | 0.2% | 10,723 |
| 2005 | 1.1 | 2.1% | 10,166 |
| 2006 | 0.1 | 0.2% | 20,133 |
| 2007 | 0.6 | 1.1% | 10,480 |
| 2008 | 0.9 | 1.8% | 10,691 |
| 2009 | 0.2 | 0.4% | 9,879 |
| 2010 | 1 | 2.0% | 10,518 |
| 2011 | 1.7 | 3.5% | 10,367 |
| 2012 | 4.1 | 8.3% | 11,053 |
| 2013 | 5.6 | 11.4% | 10,732 |
| 2014 | 0.3 | 0.5% | 13,008 |
| 2015 | 0.1 | 0.1% | 10,509 |
| 2016 | 0.3 | 0.5% | 17,800 |
| 2017 | 0.1 | 0.3% | 10,978 |
| 2018 | 0.7 | 1.5% | 10,180 |
| 2019 | 0.6 | 1.2% | 10,075 |
| 2020 | 1 | 2.1% | 10,239 |
| 2021 | 1.1 | 2.3% | 10,189 |
| 2022 | 1.6 | 3.3% | 9,711 |
| 2023 | 1.8 | 3.6% | 10,168 |
| 2024 | 3 | 6.2% | 10,152 |
| 2025 | 4 | 12.3% | 9,873 |
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 |
|---|---|---|---|---|---|---|---|---|
| UN1 | Petroleum Liquids | IC | 2.7 | 2.8 | Jan 1975 | Retired Sep 2025 | — | coming soon |
| UN2 | Petroleum Liquids | IC | 2.7 | 2.8 | Jan 1975 | Retired Sep 2025 | — | coming soon |
Owner / operator
Operator: vineyard reliability llc. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
Nearby plants
Within 80 km.
| Oak Bluffs Diesel Generating Facility | retired | 3.8 km |
| Tisbury Landfill Solar | 1 MW | 5.8 km |
| Katama Farm | 1 MW | 9.3 km |
| Nunnepog | 1 MW | 10.3 km |
| Blacksmith Road Solar 1 | 7 MW | 23.3 km |
| Notus Wind 1 | 2 MW | 24 km |