Two reports on the state of the Schuylkill River, 1867
Streams, islands, and ferries of early Philadelphia
Schuylkill Navigation Company Scrapbook
Dauphin and Sydenham car crash, Jan. 17, 1978
Half a Century of Clean Water: The Clean Water Act, 1972-2022
19th century life in South Philadelphia’s marshland
Thomas Run sewer outlet at Cobbs Creek
Schuylkill River Hydrographical Survey 1861-66 by H. P. M. Birkinbine
69th St. Sewer and Culvert across Lansdowne AVe.
Duplex Pumping Engine, Belmont Works