Block Island Wind Farm
Washington County, Rhode Island · EIA plant ID 58035 · Operator: Deepwater Wind Block Island LLC
Nameplate30MWSummer 29 MW
Generators1in service
Net generation81GWh12 mo to Aug 2026
Capacity factor32%wind units, summer MW
Heat rate—thermal plants only
First online2016
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
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), wind 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) |
|---|---|---|---|
| 2016 | 6.3 | 29.0% | — |
| 2017 | 104.4 | 40.7% | — |
| 2018 | 117.4 | 45.7% | — |
| 2019 | 117.8 | 45.9% | — |
| 2020 | 120.2 | 46.7% | — |
| 2021 | 84.2 | 32.8% | — |
| 2022 | 111.2 | 43.3% | — |
| 2023 | 87.4 | 34.1% | — |
| 2024 | 93.6 | 36.4% | — |
| 2025 | 87.4 | 34.0% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| BIWF | Offshore Wind Turbine | WS | 30 | 29.3 | Dec 2016 | Operating | — | alstom Haliade 150 |
Owner / operator
Operator: Deepwater Wind Block Island LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Deepwater Wind Block Island LLC | 100.0% | 30 MW |
Nearby plants
Within 80 km.
| Block Island | 7 MW | 8 km |
| South Fork Wind | 130 MW | 32.9 km |
| Kearsarge KWW LLC | 3 MW | 33.6 km |
| Kearsarge Westerly | 4 MW | 34.9 km |
| Revolution Wind | — | 37.4 km |
| Alton Road Solar | 14 MW | 37.7 km |