Astoria Station
Deuel County, South Dakota · EIA plant ID 61144 · Operator: Otter Tail Power Co
Nameplate349MWSummer 242 MW
Generators1in service
Net generation491GWh12 mo to Aug 2026
Capacity factor23%gas/coal/oil units, summer MW
Heat rate10,731Btu/kWhfossil units, electric fuel, HHV
First online2021Runs as intermediate
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), gas/coal/oil 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.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2021 | 271.4 | 16.8% | 10,328 |
| 2022 | 175.9 | 8.2% | 10,542 |
| 2023 | 407.2 | 19.1% | 10,374 |
| 2024 | 413.2 | 19.4% | 10,404 |
| 2025 | 455.4 | 21.5% | 10,734 |
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 | Natural Gas Fired Combustion Turbine | GT | 349 | 241.7 | Apr 2021 | Operating | — | coming soon |
Owner / operator
Operator: Otter Tail Power Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Otter Tail Power Co | 100.0% | 349 MW |
Nearby plants
Within 80 km.
| Tatanka Ridge | 154 MW | 2.3 km |
| Toronto Power Plant | — | 5.4 km |
| Buffalo Ridge II LLC | 210 MW | 7.5 km |
| Coyote Ridge | 97 MW | 13.9 km |
| Blazing Star Wind Farm 1 | 200 MW | 15.5 km |
| Buffalo Ridge I LLC | 50 MW | 17.1 km |