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