Oso Grande Wind Farm
Lea County, New Mexico · EIA plant ID 63502 · Operator: Tucson Electric Power Co
Nameplate250MWSummer 250 MW
Generators2in service
Net generation593GWh12 mo to Aug 2026
Capacity factor27%wind units, summer MW
Heat rate—thermal plants only
First online2021
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) |
|---|---|---|---|
| 2021 | 300.2 | 20.4% | — |
| 2022 | 715.8 | 32.7% | — |
| 2023 | 551.8 | 25.2% | — |
| 2024 | 709.6 | 32.3% | — |
| 2025 | 550.8 | 25.2% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| OGW24 | Onshore Wind Turbine | WT | 33.8 | 33.8 | May 2021 | Operating | — | siemens gamesa SWT-2.415-108 |
| OGW45 | Onshore Wind Turbine | WT | 216 | 216 | May 2021 | Operating | — | siemens gamesa SG 4.5-145 |
Owner / operator
Operator: Tucson Electric Power Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Tucson Electric Power Co | 100.0% | 250 MW |
Nearby plants
Within 80 km.
| Anderson Wind II | 10 MW | 20.6 km |
| Anderson Wind I | 5 MW | 20.7 km |
| Middle Daisy | 5 MW | 28 km |
| LCEC Generation LLVC | 47 MW | 32.4 km |
| Cunningham Solar II | — | 33.7 km |
| Cunningham Solar I & BESS | 108 MW | 34.8 km |