Old News: Two unusual underground rescues
Cresheim Aqueduct
Drainage area plan, early 19th century
Diagram from sewage treatment plan for Philadelphia, 1912
Down Under, Part 2: Beaver Creek as it appears today
Bottled vs. Tap in 1906
Wooden Pipes in Philadelphia
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