


Southwest Sewage Treatment Plant under construction, 1949

Two Frankford Creek Bridges, 1896-1899

Centre Square Water Works, Drawings of Intake Basin

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
