The Schuylkill Navigation: A Journey on the Historic Nineteenth Century Waterway
Thomas Gill Maps of the Schuylkill Navigation, 1827
Map Lover’s Monday: Looking for Cleaner Water
Map Lovers’ Monday: Schuylkill River from Wissahickon Creek to Norristown, 1913
Cresheim Aqueduct
Report on channelization of Frankford Creek for flood control (1947)
Down Under, Part 2: Beaver Creek as it appears today
Typhoid Fever and sewage tainted drinking water: An 1889 report from the Philadelphia Board of Health
Lighthouses along the Delaware, 1913
Centre Square Water Works, Frederick Graff, Sr. Plans, 1799
