Beaver

Beaver, county, western Pennsylvania, U.S., bordered to the west by Ohio and West Virginia. It consists of a hilly region on the Allegheny Plateau drained by the Ohio and Beaver rivers. Other waterways include Ambridge Reservoir, Brush Creek, and Raccoon Creek, which runs through Raccoon Creek State Park. The county was created in 1800. After founding utopian communities in nearby Butler county (1805) and in the state of Indiana (1814), George Rapp and his Pietist...