Report on channelization of Frankford Creek for flood control (1947)
Down Under, Part 2: Beaver Creek as it appears today
Typhoid Fever and sewage tainted drinking water: An 1889 report from the Philadelphia Board of Health
Wooden Pipes in Philadelphia
Lighthouses along the Delaware, 1913
Centre Square Water Works, Frederick Graff, Sr. Plans, 1799
Dauphin and Sydenham car crash, Jan. 17, 1978
Still photo from a video sewer inspection, 2000
Plan and profile of proposed Delaware Seventh St. Sewer, 1850
Plan of Pine Street Sewer, 1830