Centre Square Water Works, Frederick Graff, Sr. Plans, 1799
Centre Square Water Works, Latrobe Plans, 1799
Fairmount and vicinity, 1839
Wooden Water Pipe, removed from Market Street, December 6, 1901
Bethlehem Water Works, 2011
Torresdale Conduit work gang, 12/18/1906
Finished Upper Roxborough filters, 1903
Apparatus for testing model turbine wheels used at Fairmount, 1859-60
Duplex Pumping Engine, Belmont Works
Electric Pump Installations at Lardner’s Point Pumping Station