Map Lovers’ Monday: Philadelphia in 1897, with color added
Water Bureau Newspaper Scrapbook, 1942-1952
Sandy Run Watershed and the Holmesburg Water Works
Cresheim Aqueduct
You would not have wanted to drink it: Philadelphia’s water supply in 1884
Plans and maps of the Pennypack Creek Watershed in Philadelphia
Wingohocking Sewer across Penn St.
Frankford Creek Watershed: A historical overview of the Philadelphia section
Frankford Creek Watershed Historical Timeline
Down Under III: A walk in the Dobson’s Run Storm Relief Sewer, June 15, 2010