Plans and maps of the Pennypack Creek Watershed in Philadelphia
Wissahickon Pipe Aqueduct, Roxborough to Mt. Airy, 1868
Plan of Philadelphia, John Hills, 1796
Wingohocking Sewer across Penn St.
Queen Lane Pumping Station, proposed design
Early photographs of Fairmount and vicinity, 1848
Frankford Creek Watershed: A historical overview of the Philadelphia section
Report on channelization of Frankford Creek for flood control (1947)
Frankford Creek Watershed Historical Timeline
Two Frankford Creek Bridges, 1896-1899
