You would not have wanted to drink it: Philadelphia’s water supply in 1884
Plans and maps of the Pennypack Creek Watershed in Philadelphia
Wissahickon Pipe Aqueduct, Roxborough to Mt. Airy, 1868
Map Lovers’ Monday: 1891 Water Supply Plan
Plan of Philadelphia, John Hills, 1796
Wingohocking Sewer across Penn St.
Girard Avenue Bridge, Fairmount Park, 1895
Queen Lane Pumping Station, proposed design
Frankford Creek Watershed: A historical overview of the Philadelphia section
Frankford Creek Watershed Historical Timeline