For the more information about the geologic resources of the National Park Service, please visit http://www.nature.nps.gov/geology/.


Onshore Wind Energy

Onshore wind turbines
Alstom ECO 100 wind turbines. Photo by Alstom 2010, NREL 18207.

 

Onshore wind turbines capture energy from the wind and produce electricity using long, rotating blades that drive a generator located at the top of the tower behing the blades.

Onshore wind energy is among the fastest growing utility-scale renewable energy technologies in the country. The best wind resources are located in areas that receive strong, sustained wind speeds equivalent to wind power class 3 or above and 50 to 80 meters above the ground.

For more detailed information on wind energy tecnologies, please visit the Department of Energy's Office of Energy Efficiency and Renewable Energy website.


Technology-Specific Impacts

Onshore wind turbines have unique natural, cultural and historical resource impacts. While there are some concerns with potential habitat loss, land conversion, transmission infrastructure, and artificial light, the key impacts of onshore wind turbines include noise, turbine strikes, and visual impacts.

Noise: Turbine blades operating at normal speeds can generate noise beyond ambient background levels and interrupt natural soundscapes, which may reduce bird nesting, breeding, population density, and cause behavioral disturbances.

Turbine Strikes: This refers to the collision or barotrauma (physical damage to body tissue from changes in air pressure) that birds or bats may experience from wind turbines. The frequency of bird and bat collisions may differ depending on the type of bird/bat, weather conditions, and site characteristics.

Visual Impacts: The height of wind turbines, which can be hundreds of feet tall, can decrease the value of natural viewsheds, particularly in areas of recreational, historical, cultural, or archeological importance. Aviation lighting placed on top of turbines may also impact the natural lightscape and dark night skies of the area. Wind Farms typically cover thousands of acres of land and each turbine is connected by a road for construction and maintenance purposes. This network of roads can scar the area and adversely affect a visitor's visual experience.

Other Impacts: Impacts from construction and development activities, such as the construction of power lines and fugitive dust events, may also affect park resources.

For more information on potential resource impacts of onshore wind energy technologies, please reference the Wind Energy Development Programmatic Environmental Impact Statement Information Center or visit the links below.


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Last Updated: June 04, 2014