Oak Tree Energy
Oak Tree Energy is a 20 MW wind farm in Clark County, South Dakota, operated by RWE Clean Energy. EIA-860M lists 1 generating unit here, inside SPP. Its unit entered service in 2014.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Nameplate capacity
- 19.5 MW
- 19.5 MW net summer
- Generating units
- 1
- In service
- 2014
- EIA plant ID
- 59435
Where it is
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- County
- Clark County, South Dakota
- Coordinates
- 44.9333, -97.7414
- Balancing authority
- SWPP
- Sector
- IPP Non-CHP
Units, technology and status
- Operator of record
- RWE Clean Energy
- Primary energy source
- Wind
- Technologies
- Onshore Wind Turbine
- Status
- Operating
Oak Tree Energy: FAQ
- Where is Oak Tree Energy?
- In Clark County, South Dakota (SD). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
- How big is Oak Tree Energy?
- 20 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.
- Who owns Oak Tree Energy?
- EIA-860M names RWE Clean Energy as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
- Is this the same as Oak Tree Energy LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — RWE Clean Energy here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Oak Tree Energy LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is Oak Tree Energy still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.