The Schuylkill Navigation: A Journey on the Historic Nineteenth Century Waterway
The Schuylkill Navigation: A Journey on the Historic Nineteenth Century Waterway
Thomas Gill Maps of the Schuylkill Navigation, 1827
Old News: Two unusual underground rescues
Birch’s Views of Philadelphia, 1800
Cresheim Aqueduct
Drainage area plan, early 19th century
Diagram from sewage treatment plan for Philadelphia, 1912
Early visions of Philadelphia’s airport
Down Under, Part 2: Beaver Creek as it appears today