Centre Square Water Works, Frederick Graff, Sr. Plans, 1799
Centre Square Water Works, Latrobe Plans, 1799
Fairmount Water Works, W.H. Bartlett, 1839
Thomas Run sewer outlet during construction
Perkiomen Water Supply Surveys, 1866
Frankford Creek: Sad History of an Urban Stream title page
Electric Pump Installations at Lardner’s Point Pumping Station
Commencement of laying the main on the East side of the River, 1871