Oak Tree Energy
Clark County, South Dakota · EIA plant ID 59435 · Operator: RWE Clean Energy
Nameplate20MWSummer 20 MW
Generators1in service
Net generation66GWh12 mo to Dec 2025
Capacity factor39%wind units, summer MW
Heat rate—thermal plants only
First online2014
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) |
|---|---|---|---|
| 2014 | 0 | 0.0% | — |
| 2015 | 72 | 42.1% | — |
| 2016 | 76.4 | 44.6% | — |
| 2017 | 73.6 | 43.1% | — |
| 2018 | 69.7 | 40.8% | — |
| 2019 | 70 | 41.0% | — |
| 2020 | 73.1 | 42.7% | — |
| 2021 | 71.8 | 42.0% | — |
| 2022 | 77.9 | 45.6% | — |
| 2023 | 66.7 | 39.0% | — |
| 2024 | 69.4 | 40.5% | — |
| 2025 | 65.8 | 38.5% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| OTE14 | Onshore Wind Turbine | WT | 19.5 | 19.5 | Dec 2014 | Operating | — | ge 1.85-87 |
Owner / operator
Operator: RWE Clean Energy. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| RWE Clean Energy | 100.0% | 20 MW |
Nearby plants
Within 80 km.
| Clark (SD) | 3 MW | 6.4 km |
| Crocker Wind Farm | 200 MW | 14.7 km |
| Day County Wind LLC | 99 MW | 33.9 km |
| Watertown Power Plant | 68 MW | 50 km |
| Groton Generating Station | 216 MW | 56.4 km |
| RE Solar, LLC | 8 MW | 59.9 km |