Towers for the Mackinac Bridge going up (36 of 50)

Additional tower sections are set in place by the barge mounted derrick, Electronic reproduction of text.  The Mackinac Bridge 1954 - 1958. Mackinac Bridge Authority
Abstract/Description: Additional tower sections are set in place by the barge mounted derrick
Subject(s): Bridges--Design and construction
St. Ignace (Mich.)
Mackinaw City (Mich.)
Mackinac Bridge (Mich.)
Date Created: 1955 (approximate)