Berkshire Wind Power Project
Berkshire County, Massachusetts · EIA plant ID 57721 · Operator: Massachusetts Mun Wholes Electric Co
Nameplate20MWSummer 20 MW
Generators3in service
Net generation27GWh12 mo to Aug 2026
Capacity factor16%wind units, summer MW
Heat rate—thermal plants only
First online2011
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) |
|---|---|---|---|
| 2011 | 30.2 | 34.2% | — |
| 2012 | 47.6 | 36.1% | — |
| 2013 | 51.7 | 39.4% | — |
| 2014 | 51.2 | 39.0% | — |
| 2015 | 48.9 | 37.2% | — |
| 2016 | 47 | 35.7% | — |
| 2017 | 48.9 | 37.3% | — |
| 2018 | 44.9 | 34.2% | — |
| 2019 | 37.9 | 26.1% | — |
| 2020 | 56.2 | 32.6% | — |
| 2021 | 43.3 | 25.2% | — |
| 2022 | 42.3 | 24.6% | — |
| 2023 | 30.6 | 17.8% | — |
| 2024 | 27.2 | 15.8% | — |
| 2025 | 41.9 | 24.4% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| BWP | Onshore Wind Turbine | WT | 15 | 15 | May 2011 | Operating | — | ge 1.5 SLE |
| HN-8 | Onshore Wind Turbine | WT | 2.3 | 2.3 | Sep 2019 | Operating | — | ge 2.3-116 |
| HN-9 | Onshore Wind Turbine | WT | 2.3 | 2.3 | Sep 2019 | Operating | — | ge 2.3-116 |
Owner / operator
Operator: Massachusetts Mun Wholes Electric Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Berkshire Wind Power Cooperative Corp | 100.0% | 20 MW |
Nearby plants
Within 80 km.
| Nexamp Peak CSG | 2 MW | 2.9 km |
| Jiminy Peak Wind QF | 2 MW | 5 km |
| Saddleback Solar | 6 MW | 6.8 km |
| Stephentown Spindle | 20 MW | 9 km |
| Skyline Solar | 8 MW | 10.1 km |
| East Acres Solar NG, LLC | 6 MW | 11.3 km |