Tower parts pre-fab for Mackinac Bridge (7 of 7)

Tower fabrication at Ambridge, PA, Electronic reproduction of photograph.  The Mackinac Bridge 1954 - 1958. Mackinac Bridge Authority
Abstract/Description: Tower fabrication at Ambridge, PA
Subject(s): Bridges--Design and construction
St. Ignace (Mich.)
Mackinaw City (Mich.)
Mackinac Bridge (Mich.)
Date Created: 1955 (approximate)