Wissahickon Pipe Aqueduct, Roxborough to Mt. Airy, 1868
Ghosts of Water in Fairmount Park, Part II, with Adam Levine
Plan of Philadelphia, John Hills, 1796
Queen Lane Pumping Station, proposed design
Listening for leaks
Centre Square Water Works, Drawings of Intake Basin
Centre Square Water Works, Frederick Graff, Sr. Plans, 1799
Centre Square Water Works, Latrobe Plans, 1799
Visionary planning report for Philadelphia region, 1928
The Water Supply Problem of Philadelphia, 1899