Drainage area plan, early 19th century
Early visions of Philadelphia’s airport
Down Under, Part 2: Beaver Creek as it appears today
Dauphin and Sydenham car crash, Jan. 17, 1978
Fairmount Water Works, W.H. Bartlett, 1839
Fairmount Water Works from the forebay, 1833
Fourth of July, Centre Square, ca. 1812
Wooden Water Pipe, removed from Market Street, December 6, 1901
Centre Square Engine House, ca. 1807
Thomas Run sewer outlet at Cobbs Creek