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
Southeast Sewage Treatment Works diagram, 1955
City officials tour new interceptor sewer, 1953
Pennypack Sewage Treatment Works, 1914
Devereaux Street Sewer, Philadelphia magazine, 1911
Bingham Street Sewer, East of Tacony Creek, 1921