Centre Square Water Works, Drawings of Intake Basin
From Creek To Sewer
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
James W. Phillips Letter Book, 1904-1913
Two reports on the state of the Schuylkill River, 1867
Plan of Pine Street Sewer, 1830
Mill Creek Sewer under construction, 1883