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
Baldwin Locomotive Works
View of Fairmount Water Works, ca. 1827
Wastewater Treatment Process diagram
Outside Sprinkling Filters, Spring Garden Sewage Experiment Station, 1911
State Road triple pipeline construction, 1904
Torresdale Conduit work gang, 1906
Upper Roxborough Filter Beds Complete, 1903