


Centre Square Water Works, Frederick Graff, Sr. Plans, 1799

Centre Square Water Works, Latrobe Plans, 1799

Three reports on Philadelphia’s Sewage Treatment Project, 1911-1914

The Sad History of Frankford Creek

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
