Two reports on the state of the Schuylkill River, 1867
Plan of Pine Street Sewer, 1830
Mill Creek Sewer under construction, 1883
Torresdale Conduit work gang, 12/18/1906
Finished Upper Roxborough filters, 1903
Outside Sprinkling Filters, Spring Garden Sewage Experiment Station, 1911
State Road triple pipeline construction, 1904