The pipe beneath the rocky path
Creek to Sewer: Water History Video 1
Map Lover’s Monday: Looking for Cleaner Water
Map Lovers’ Monday: Schuylkill River from Wissahickon Creek to Norristown, 1913
Plans and maps of the Pennypack Creek Watershed in Philadelphia
Report on channelization of Frankford Creek for flood control (1947)
Frankford Creek Watershed Historical Timeline
Drawing Dock Creek
Newspaper Clipping Scrapbooks of Frederic Graff Jr.,Chief Engineer of the Philadelphia Water Department: Part 1, 1854-1857
Newspaper Clipping Scrapbooks of Frederick Graff Jr., Chief Engineer of the Philadelphia Water Department. Part 2: 1858-1871
