You would not have wanted to drink it: Philadelphia’s water supply in 1884
Plans and maps of the Pennypack Creek Watershed in Philadelphia
Ghosts of Water in Fairmount Park, Part II, with Adam Levine
Map Lovers’ Monday: 1891 Water Supply Plan
Plan of Philadelphia, John Hills, 1796
Wingohocking Sewer across Penn St.
Frankford Creek Watershed: A historical overview of the Philadelphia section
Frankford Creek Watershed Historical Timeline
Two Frankford Creek Bridges, 1896-1899
Down Under III: A walk in the Dobson’s Run Storm Relief Sewer, June 15, 2010