Newspaper Clipping Scrapbooks of Frederic Graff Jr.,Chief Engineer of the Philadelphia Water Department: Part 1, 1854-1857
From Creek To Sewer
The Sad History of Frankford Creek
Mill Creek Sewer under construction, 1883
Drain water from sludges obtained from sedimentation, septic and Emscher tanks
State Street pipeline construction, 1904
Upper Roxborough filter beds under construction, July 1902
