Centre Square Water Works, Drawings of Intake Basin
Centre Square Water Works, Frederick Graff, Sr. Plans, 1799
Centre Square Water Works, Latrobe Plans, 1799
Pennsylvania Railroad Bridge at Manayunk, about 1895
Gritty and the Phanatic in Ida’s Floodwaters
Plan of Pine Street Sewer, 1830
Mill Creek Sewer under construction, 1883
Fairmount Gardens with the Schuylkill Bridge, 1839
Fairmount Water Works, W.H. Bartlett, 1839
Fairmount Water Works and the Schuylkill River, 1838