Watersheds Delaware River Watershed

Dauphin and Sydenham car crash, Jan. 17, 1978

Black-and-white image showing sewer outlet, retaining walls and body of water

Cohocksink Sewer System outlet at Laurel Street

The Pennypack Sewage Treatment Works in 1914

Pennypack Sewage Treatment Works, 1914

Photo of a work crew constructing a sewer in Rock Run, Tacony Creek, Philadelphia

Sewer construction, Rock Run, 1922

Eleven men in a work gang plug leaks in a tunnel, the Torresdale Conduit

Torresdale Conduit work gang, 1906