Water Bureau Newspaper Scrapbook, 1942-1952
Annual reports and other documents relating to Philadelphia’s water supply system, 1796-1992
Thomas Mill Covered Bridge over Wissahickon Creek (Picturesque America)
Down Under III: A walk in the Dobson’s Run Storm Relief Sewer, June 15, 2010
Requiem for a stream: A brief history of Dobson’s Run
Newspaper Clipping Scrapbooks of Frederick Graff Jr., Chief Engineer of the Philadelphia Water Department. Part 2: 1858-1871
Centre Square Water System
Centre Square Water Works, Drawings of Intake Basin
Centre Square Water Works, Frederick Graff, Sr. Plans, 1799
Centre Square Water Works, Latrobe Plans, 1799
