Oak Bluffs Diesel Generating FacilityRetired
Dukes County, Massachusetts · EIA plant ID 1597 · Operator: vineyard reliability llc
×8 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 | 0.2 | 0.3% | 10,641 |
| 2002 | 1.5 | 2.1% | 10,101 |
| 2003 | 2.1 | 3.0% | 12,636 |
| 2004 | 0.3 | 0.4% | 9,898 |
| 2005 | 1.2 | 1.7% | 10,347 |
| 2006 | 0.8 | 1.1% | 10,839 |
| 2007 | 2.7 | 3.8% | 10,709 |
| 2008 | 2.7 | 3.9% | 10,737 |
| 2009 | 1.6 | 2.2% | 9,978 |
| 2010 | 4 | 5.6% | 9,882 |
| 2011 | 6.6 | 9.3% | 9,791 |
| 2012 | 6.3 | 8.5% | 10,397 |
| 2013 | 9.4 | 12.8% | 10,140 |
| 2014 | 0.2 | 0.2% | 16,169 |
| 2015 | 0.1 | 0.1% | 11,825 |
| 2016 | 0.3 | 0.4% | 10,302 |
| 2017 | 0.2 | 0.2% | 12,474 |
| 2018 | 1.5 | 2.0% | 9,956 |
| 2019 | 0.8 | 1.1% | 9,953 |
| 2020 | 1 | 1.4% | 10,106 |
| 2021 | 2 | 2.7% | 10,139 |
| 2022 | 1.8 | 2.5% | 10,491 |
| 2023 | 1.3 | 1.8% | 9,858 |
| 2024 | 2.1 | 2.9% | 9,667 |
| 2025 | 1.9 | 3.8% | 9,666 |
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 1969 | Retired Sep 2025 | — | coming soon |
| UN2 | Petroleum Liquids | IC | 2.7 | 2.8 | Jan 1969 | Retired Sep 2025 | — | coming soon |
| UN3 | Petroleum Liquids | IC | 2.7 | 2.8 | Jan 1972 | 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.
| Tisbury Landfill Solar | 1 MW | 2.1 km |
| West Tisbury Generating Facility | retired | 3.8 km |
| Katama Farm | 1 MW | 10.5 km |
| Nunnepog | 1 MW | 11.4 km |
| Blacksmith Road Solar 1 | 7 MW | 19.6 km |
| Notus Wind 1 | 2 MW | 20.3 km |