Centre Square Water Works, Drawings of Intake Basin
Centre Square Water Works, Frederick Graff, Sr. Plans, 1799
Centre Square Water Works, Latrobe Plans, 1799
Centre Square Engine House, ca. 1807
Torresdale Conduit work gang, 12/18/1906
Finished Upper Roxborough filters, 1903
Duplex Pumping Engine, Belmont Works
Electric Pump Installations at Lardner’s Point Pumping Station
New Mill House at Fairmount