Early visions of Philadelphia’s airport
Frankford Creek Watershed Historical Timeline
Drawing Dock Creek
Cobbs Creek in the Days of the Old Powder Mill
The Manayunk Expressway
Sewers, Pollution, and Public Health in 19th Century Philadelphia
The Worry of the Wires
Fairmount Gardens with the Schuylkill Bridge, 1839
View of Fairmount Water Works, ca. 1827