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PWD Celebrates Black History Month
Birch’s Views of Philadelphia, 1800
Map of Historic Dock Creek
Last gasp of the Schuylkill Interceptor, December 20, 1956
Thomas Mill Covered Bridge over Wissahickon Creek (Picturesque America)
Centre Square Water System, Drawings of Intake Basin
Centre Square Water Works, Frederick Graff, Sr. Plans, 1799
Centre Square Water Works, Latrobe Plans, 1799
The Water Supply Problem of Philadelphia, 1899
Plan of Pine Street Sewer, 1830
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
Roman Aqueduct in Segovia, Spain
Emscher Tank Installation at Essen Nord, Germany
Volume of Sludge from 1,000,000 Gallons of Sewage
Diagram Showing Rate Between Bulk of Wet Sludge and Its Percentage Moisture
Sludge Drying Beds, Essen Nord, Germany
Grit Chamber, Essen, Germany
Effects of Expansion of Gas Bubbles in Enscher Sludge Shown in Right-Hand Cylinder
Sludge Presses for Grease Recovery, Bradford, England
Drain water from sludges obtained from sedimentation, septic and Emscher tanks
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