Centre Square Water Works, Frederick Graff, Sr. Plans, 1799
Centre Square Water Works, Latrobe Plans, 1799
The Water Supply Problem of Philadelphia, 1899
Pennsylvania Railroad Bridge at Manayunk, about 1895
Gritty and the Phanatic in Ida’s Floodwaters
Dauphin and Sydenham car crash, Jan. 17, 1978
Images from ‘The Water Supply of the City of Philadelphia by a proposed Aqueduct from Norristown Dam’
Plan and profile of proposed Delaware Seventh St. Sewer, 1850
Plan of Pine Street Sewer, 1830
Mill Creek Sewer under construction, 1883