Rockland Wind Farm — United States of America

Rockland Wind Farm is a 79.2 MW wind power plant in Idaho, United States of America. It is operated by Ridgeline Energy LLC. Based on reported annual generation of 248 GWh, it can supply roughly 71k homes. It ranks #3100 of 10,884 United States of America power plants by installed capacity. Commissioned in 2012, it is around 14 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 USA0057766.

Data provenance

Source of the capacity and fuel values:

capacity: GEM · 2026 · L100000906850; fuel: WRI GPPD

In context: how this plant compares

At 79.2 MW, Rockland Wind Farm 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

36%, from 248 GWh of reported generation; the median for 1120 wind plants in United States of America that report generation is 30%

Generation trend

227 GWh in 2013 and 248 GWh in 2019 (+9%)

Highest and lowest year

2018: 346 GWh; 2015: 218 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

602 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 Ridgeline Energy LLC.

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 42.7°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 76% above 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: 88/100 — this site sits in the top 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 #538 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

• Power County Plant · Gas · 360 MW · Idaho
• American Falls · Hydro · 92.4 MW · Idaho
• Power County Wind Park South · Wind · 22.5 MW · Idaho
• Power County Wind Park North · Wind · 22.5 MW · Idaho
• American Falls Solar · Solar · 20 MW · Idaho
• American Falls Solar II · Solar · 20 MW · Idaho

Location

Coordinates 42.6747, -112.9019 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions