Twin Buttes Wind Project
Bent County, Colorado · EIA plant ID 56460 · Operator: Avangrid Renewables Inc
Nameplate75MWSummer 75 MW
Generators1in service
Net generation228GWh12 mo to Dec 2025
Capacity factor35%wind units, summer MW
Heat rate—thermal plants only
First online2007
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) |
|---|---|---|---|
| 2007 | 128.7 | 38.9% | — |
| 2008 | 265.4 | 40.3% | — |
| 2009 | 256.7 | 39.1% | — |
| 2010 | 269.4 | 41.0% | — |
| 2011 | 245.6 | 37.4% | — |
| 2012 | 264 | 40.1% | — |
| 2013 | 251 | 38.2% | — |
| 2014 | 240.9 | 36.7% | — |
| 2015 | 237.7 | 36.2% | — |
| 2016 | 262.3 | 39.8% | — |
| 2017 | 230 | 35.0% | — |
| 2018 | 257.3 | 39.2% | — |
| 2019 | 239.7 | 36.5% | — |
| 2020 | 265.4 | 40.3% | — |
| 2021 | 171.2 | 26.1% | — |
| 2022 | 206.8 | 31.5% | — |
| 2023 | 219 | 33.3% | — |
| 2024 | 233 | 35.4% | — |
| 2025 | 228.2 | 34.7% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| WT1 | Onshore Wind Turbine | WT | 75 | 75 | Jul 2007 | Operating | — | ge 1.5 SLE |
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% | 75 MW |
Nearby plants
Within 80 km.
| Colorado Green Holdings LLC | 162 MW | 21.3 km |
| Twin Buttes II Wind | 75 MW | 29.9 km |
| Springfield (CO) | 3 MW | 36.8 km |
| Lamar Solar | — | 47.5 km |
| Vilas Solar Array | 4 MW | 47.5 km |
| Lamar Plant | 8 MW | 49.1 km |