Tower caisson for the Mackinac Bridge (35 of 45)

The first section of caisson No. 20 is in place and ready for its descent to the bottom of the Straits of Mackinac where it will become a permanent part of the Mackinac Bridge., Electronic reproduction of photograph.  The Mackinac Bridge 1954 - 1958. Mackinac Bridge Authority
Abstract/Description: The first section of caisson No. 20 is in place and ready for its descent to the bottom of the Straits of Mackinac where it will become a permanent part of the Mackinac Bridge.
Subject(s): Bridges--Design and construction
St. Ignace (Mich.)
Mackinaw City (Mich.)
Mackinac Bridge (Mich.)
Date Created: 1954 (approximate)