 
		 
		 
		Centennial Exhibition situation plan, 1876
 
		Bureau of Water, Cumberland, west of 13th Street, pipe line, 1907
 
		Lancaster/Schuylkill Bridge (Upper Ferry Bridge)
 
		Race Bridge, Fairmount Water Works, 1834
View of Fairmount Water Works, ca. 1827
 
		Pipe Test, 1914
 
		Northeast Sewage Plant opening, 1951
 
		City officials tour new interceptor sewer, 1953
 
		Devereaux Street Sewer, Philadelphia magazine, 1911
