Annual reports and other documents relating to Philadelphia’s water supply system, 1796-1992
Buried Treasures No. 1: The Franklin Sugar Refinery
Frankford Creek Watershed Historical Timeline
Frankford Creek Watershed in the context of the development of Philadelphia’s sewers and sewage treatment system
Newspaper Clipping Scrapbooks of Frederick Graff Jr., Chief Engineer of the Philadelphia Water Department. Part 2: 1858-1871
Delaware River Harbor Police Report, 1884
CITIZENS’ BUSINESS: 1939-1946
