Tatanka Ridge
Deuel County, South Dakota · EIA plant ID 61046 · Operator: Tatanka Ridge LLC
Nameplate154MWSummer 154 MW
Generators1in service
Net generation513GWh12 mo to Aug 2026
Capacity factor38%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 | 612.2 | 45.4% | — |
| 2022 | 681.4 | 50.5% | — |
| 2023 | 560.8 | 41.6% | — |
| 2024 | 598.2 | 44.2% | — |
| 2025 | 593.8 | 44.0% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| WT1 | Onshore Wind Turbine | WT | 154 | 154 | Jan 2021 | Operating | — | ge 2.82-127 |
Owner / operator
Operator: Tatanka Ridge LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| WEC Energy Group | 85.0% | 131 MW |
| Avangrid Power LLC | 15.0% | 23 MW |
Nearby plants
Within 80 km.
| Astoria Station | 349 MW | 2.3 km |
| Toronto Power Plant | — | 3.7 km |
| Buffalo Ridge II LLC | 210 MW | 8.2 km |
| Coyote Ridge | 97 MW | 15.9 km |
| Blazing Star Wind Farm 1 | 200 MW | 17.3 km |
| Buffalo Ridge I LLC | 50 MW | 19.3 km |