Sleeping Bear LLC — United States of America

Sleeping Bear LLC is a 94.5 MW wind power plant in Oklahoma, United States of America. It is operated by NRG Energy Gas & Wind Holdings Inc. Based on reported annual generation of 241 GWh, it can supply roughly 69k homes. It ranks #2882 of 10,884 United States of America power plants by installed capacity. Commissioned in 2007, it is around 19 years old — relatively modern. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, wind supplies about 10.3% of United States of America's electricity; the national grid averages 384 gCO₂/kWh (43.0% low-carbon) (2025).

Plant data: WRI Global Power Plant Database (CC BY 4.0), id USA0056621.

Data provenance

Source of the capacity and fuel values:

capacity: GEM · 2026 · L100000906922; fuel: WRI GPPD

In context: how this plant compares

At 94.5 MW, Sleeping Bear LLC is well above the median wind plant in United States of America (67.7 MW). Wind turbines convert moving air into electricity; output is variable and site-dependent, and modern turbines deliver some of the lowest-cost new generation on many grids.

Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.

Key facts

Load factor

29%, from 241 GWh of reported generation, in line with the 30% median for 1120 wind plants in United States of America

Generation trend

308 GWh in 2013 and 241 GWh in 2019 (−22%)

Highest and lowest year

2014: 310 GWh; 2019: 241 GWh

Share of United States of America wind capacity

less than 0.1% of 104,873 MW across 1,139 plants in this dataset

Age among peers

215 of 1,139 dated wind plants in United States of America are older

Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).

Reported generation trend

Annual generation (GWh), WRI Global Power Plant Database (CC BY 4.0).

Owner

Operated by NRG Energy Gas & Wind Holdings Inc. All plants by this company →

Local climate & thermal context

This wind plant converts the kinetic energy of wind into electricity through turbine rotors. It sits in a cold semi-arid steppe climate (Köppen BSk) — Northern Hemisphere, latitude 36.6°N — which shapes how much energy it can produce and how its output varies through the year.

Monthly mean temperature

Heating degree-days here run 10% below the median power plant in this dataset — a proxy for how much extra energy heated equipment must replace through its surfaces in winter.

Climate heat-demand index: 46/100 — this site sits in the mid third of the power plants we cover by heating degree-days.

Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.

Site climate & environmental severity

This site sits in a benign, low-corrosion environment (estimated ISO 9223 class C1 — Very low), with dust abrasion the leading environmental stress.

Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.

How it compares & nearby plants

The #492 largest wind power plant of 1139 in United States of America by capacity.

United States of America has 1139 wind power plants in this dataset, together about 104,873 MW of capacity.

Nearby power plants

• Centennial Wind Farm · Wind · 120 MW · Oklahoma
• Oklahoma Wind Energy Center · Wind · 102 MW · Oklahoma
• Buffalo Bear LLC · Wind · 18.9 MW · Oklahoma
• Mooreland · Gas · 260 MW · Oklahoma
• OU Spirit Wind Farm · Wind · 101.2 MW · Oklahoma
• Laverne Diesel Generating Plant · Oil · 4 MW · Oklahoma

Location

Coordinates 36.6403, -99.5006 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions