The Centre Square Works, 1801
The Water Works of the City of Philadelphia. The Story of their Development and Engineering Specifications.
Pipeline being laid in Wissahickon Avenue
The Water and Drainage History of Philadelphia: A seven-part course
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