Centre Square Water Works, Frederick Graff, Sr. Plans, 1799
Centre Square Water Works, Latrobe Plans, 1799
The Centre Square Works, 1801
The Water Works of the City of Philadelphia. The Story of their Development and Engineering Specifications.
Three reports on Philadelphia’s Sewage Treatment Project, 1911-1914
Wood truss drawbridge, Orthodox Street over Frankford Creek, 1899 [Detail]
Bridge Street Draw, July 26, 1897
“Philadelphia Underground,” Jan. 29, 1961
State Street pipeline construction, 1904
Electric Pump Installations at Lardner’s Point Pumping Station
