Fairmount Park topographical map, showing East Park Reservoir, 1872
Wingohocking Sewer outfall into Frankford Creek
Thomas Mill Covered Bridge over Wissahickon Creek (Picturesque America)
Plans and maps of the Pennypack Creek Watershed in Philadelphia
Wingohocking Sewer across Penn St.
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
Down Under III: A walk in the Dobson’s Run Storm Relief Sewer, June 15, 2010
