


Centre Square Water Works, Frederick Graff, Sr. Plans, 1799

Centre Square Water Works, Latrobe Plans, 1799

Pipeline being laid in Wissahickon Avenue

Dauphin and Sydenham car crash, Jan. 17, 1978

Still photo from a video sewer inspection, 2000

Plan and profile of proposed Delaware Seventh St. Sewer, 1850

Plan of Pine Street Sewer, 1830

Mill Creek Sewer under construction, 1883

Fairmount Water Works, W.H. Bartlett, 1839

Fairmount Water Works from the forebay, 1833
