Logan Demanding Flood Relief, 8/18/38
Frankford Creek Overflows, 11/1/32
Sewer Demand Taken to City Hall, 7/25/32
In The Storm’s Track, Philadelphia Record, 1882-09-25
Hudson’s Square – A Place Through Time, Archeological Data Recovery on Block 2 of Independence Mall
“Philadelphia Underground,” Jan. 29, 1961
“Sewer Crawlers,” January 29, 1961
Color Diagram of Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia
Fairmount Park, bird’s eye view from Lemon Hill, detail
City of Philadelphia Water Loan Certificate, 1872
