Stiffening trusses for the Mackinac Bridge (7 of 67)

View of the north tower with stiffening truss progress as an ocean freight passes under the bridge, Electronic reproduction of text.  The Mackinac Bridge 1954 - 1958. Mackinac Bridge Authority
Abstract/Description: View of the north tower with stiffening truss progress as an ocean freight passes under the bridge
Subject(s): Bridges--Design and construction
St. Ignace (Mich.)
Mackinaw City (Mich.)
Mackinac Bridge (Mich.)
Date Created: 1957 (approximate)