bfresh The Quemahoning Dam, located on Quemahoning Creek on the border of Quemahoning Township, Pennsylvania and Conemaugh Township, Pennsylvania, just south of Hollsopple, was constructed by the Manufacturers Water Company to supply water for the Cambria Steel Company's works in Johnstown, PA. Construction was begun in 1910 and completed in 1913. The reservoir created by this dam is about five miles long and two miles wide at its widest place, and drains into the Stoneycreek River and thence into the Kiski-Conemaugh system. It is the one of the largest artificial bodies of water in Pennsylvania, and is known as a stopover for migratory waterfowl, including geese, swans, and herons. Fishing, boating, camping and occasional whitewater rafting are among the recreational activities available.