Centre Square Water Works, Drawings of Intake Basin
Centre Square Water Works, Frederick Graff, Sr. Plans, 1799
Centre Square Water Works, Latrobe Plans, 1799
Pipeline being laid in Wissahickon Avenue
Fairmount and vicinity, 1839
Wooden Water Pipe, removed from Market Street, December 6, 1901
Centre Square Engine House, ca. 1807
Bethlehem Water Works, 2011
Torresdale Conduit work gang, 12/18/1906
Finished Upper Roxborough filters, 1903