 
		 
		 
		Pennsylvania Hospital in Pine Street
 
		Torresdale Conduit work gang, 12/18/1906
 
		Finished Upper Roxborough filters, 1903
 
		Outhouse over the Schuylkill near Pottstown
 
		Northeast Sewage Plant opening, 1951
 
		City officials tour new interceptor sewer, 1953
 
		Outside Sprinkling Filters, Spring Garden Sewage Experiment Station, 1911
 
		State Road triple pipeline construction, 1904
