Mill Creek Sewer under construction, 1883
Fairmount Water Works, W.H. Bartlett, 1839
Fairmount Water Works from the forebay, 1833
Fourth of July, Centre Square, ca. 1812
Centre Square Engine House, ca. 1807
Grit Chamber, Essen, Germany
Sludge Presses for Grease Recovery, Bradford, England
Drain water from sludges obtained from sedimentation, septic and Emscher tanks
Thomas Run sewer outlet during construction
A Day in the Ma’sh – Oil Refinery