Plans and maps of the Pennypack Creek Watershed in Philadelphia
Wissahickon Pipe Aqueduct, Roxborough to Mt. Airy, 1868
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.
Girard Avenue Bridge, Fairmount Park, 1895
Philadelphia’s Sewer Problem
Sewer systems, City of Philadelphia, 1927 and 1929
Queen Lane Pumping Station, proposed design