Plan of Pine Street Sewer, 1830
Mill Creek Sewer under construction, 1883
Norman Lofton inspects sewer at Ditman and Sheffield, 1987
“Philadelphia Underground,” Jan. 29, 1961
State Street pipeline construction, 1904
Upper Roxborough filter beds under construction, July 1902
Outhouse over the Schuylkill near Pottstown
Standard Philadelphia (B) Hydrant
Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia, 1912
Typical house drainage
