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Pittsburgh Aqueduct 
Name: Pittsburgh Aqueduct
Collection: Vogel Slide Collection
Site: Pennsylvania Canal
Unit: 7
Piece: 2-50
Structure: Aqueduct
Photo credit: Robert M. Vogel
Photo date: 0000-00-00
Notes: Historic photograph of the Pittsburgh Aqueduct. The aqueduct was designed by John A. Roebling and completed in May of 1845.
http://www.clpgh.org/research/pittsburgh/patentees/roebling.html