Night operation of windmills at the North Allegheny Windpower Project has been halted due to the discovery of a dead Indiana bat beneath one of the wind turbines. The Indiana bat is an endangered specifies protected by the Endangered Species Act.
On September 26, 2011, the deceased Indiana bat was discovered during a volunteer daily monitoring of the 35-windmill farm in Cambria County near Pittsburgh, Pennsylvania, precipitating immediate shut down of night operation. The monitoring is part of the Pennsylvania Game Commission Voluntary Wind Energy Agreement. Duke Energy Corp., the owner of the facility, and party to the Voluntary Wind Energy Agreement, notified the Pennsylvania Game Commission and the U.S. Fish and Wildlife Service upon discovery of the bat, and has worked with the agencies to come up with an approach to deal with the risk of bat fatalities.
The North Allegheny Windpower Project began commercial operation in September 2009, and generates 70 megawatts of electricity. The wind farm supplies its electricity to FirstEnergy.