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Infrastructure
History of Water in Roxborough: A talk by Adam Levine
Thomas Mill Covered Bridge over Wissahickon Creek (Picturesque America)
Requiem for a stream: Still House Run in Manayunk
The Manayunk Expressway
Manayunk and the Schuylkill Navigation
Roxborough Works (1869)
Upper Roxborough filter beds under construction, July 1902