Thomas Mill Covered Bridge over Wissahickon Creek (Picturesque America)
Centre Square Water Works, Frederick Graff, Sr. Plans, 1799
Centre Square Water Works, Latrobe Plans, 1799
Bridge Street Draw, July 26, 1897
State Street pipeline construction, 1904
Electric Pump Installations at Lardner’s Point Pumping Station
Standard Philadelphia (B) Hydrant
Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia, 1912
New Mill House at Fairmount
Water Works Standpipe, 1853
