“Philadelphia Underground,” Jan. 29, 1961
Color Diagram of Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia
30th Street Sewer
Oak Lane Reservoir pipeline, 1904
Upper Roxborough filter beds under construction, July 1902
Electric Pump Installations at Lardner’s Point Pumping Station
Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia, 1912
Lancaster/Schuylkill Bridge (Upper Ferry Bridge)
Pipe Test, 1914
Southeast Sewage Treatment Works diagram, 1955
