Buffalo Ridge II LLC
Brookings County, South Dakota · EIA plant ID 57424 · Operator: Avangrid Renewables Inc
Nameplate210MWSummer 210 MW
Generators1in service
Net generation510GWh12 mo to Aug 2026
Capacity factor28%wind units, summer MW
Heat rate—thermal plants only
First online2010
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) |
|---|---|---|---|
| 2010 | 49.2 | 31.5% | — |
| 2011 | 564.6 | 30.7% | — |
| 2012 | 627.8 | 34.0% | — |
| 2013 | 586.8 | 31.9% | — |
| 2014 | 614.5 | 33.4% | — |
| 2015 | 589.2 | 32.0% | — |
| 2016 | 622.2 | 33.7% | — |
| 2017 | 614.3 | 33.4% | — |
| 2018 | 591.2 | 32.1% | — |
| 2019 | 514.3 | 28.0% | — |
| 2020 | 548.6 | 29.7% | — |
| 2021 | 328.1 | 17.8% | — |
| 2022 | 353.6 | 19.2% | — |
| 2023 | 369 | 20.1% | — |
| 2024 | 341.5 | 18.5% | — |
| 2025 | 479.3 | 26.1% | — |
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 | Onshore Wind Turbine | WT | 210 | 210 | Dec 2010 | Operating | — | gamesa G87-2.0 |
Owner / operator
Operator: Avangrid Renewables Inc. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Avangrid Renewables Inc | 100.0% | 210 MW |
Nearby plants
Within 80 km.
| Toronto Power Plant | — | 7.4 km |
| Astoria Station | 349 MW | 7.5 km |
| Tatanka Ridge | 154 MW | 8.2 km |
| Coyote Ridge | 97 MW | 10.6 km |
| Buffalo Ridge I LLC | 50 MW | 15.9 km |
| Julia Hills LLC | 2 MW | 18.5 km |