Southwest Sewage Treatment Plant under construction, 1949
History of Belfield (1934)
The Water Supply Problem of Philadelphia, 1899
Dauphin and Sydenham car crash, Jan. 17, 1978
Still photo from a video sewer inspection, 2000
Norman Lofton inspects sewer at Ditman and Sheffield, 1987
Emscher Tank Installation at Essen Nord, Germany
Drain water from sludges obtained from sedimentation, septic and Emscher tanks
Thomas Run sewer outlet at Cobbs Creek
Centennial Exhibition situation plan, 1876
