The Schuylkill Navigation: A Journey on the Historic Nineteenth Century Waterway
Thomas Gill Maps of the Schuylkill Navigation, 1827
Cresheim Aqueduct
Down Under, Part 2: Beaver Creek as it appears today
Centre Square Water Works, Frederick Graff, Sr. Plans, 1799
Dauphin and Sydenham car crash, Jan. 17, 1978
Plan and profile of proposed Delaware Seventh St. Sewer, 1850
Plan of Pine Street Sewer, 1830
Fairmount Water Works, W.H. Bartlett, 1839
Fairmount and vicinity, 1839