Wissahickon Pipe Aqueduct, Roxborough to Mt. Airy, 1868
Bridge Street Draw, construction of piers, ca. 1896
69th St. Sewer and Culvert across Lansdowne AVe.
Showing the method of sinking the pipe on the bed of the river
Includes pipes of all sizes, from small distribution mains to giant transmission mains, including the Torresdale Conduit, with a diameter of 10' 6".