Moving tower caisson for the Mackinac Bridge (4 of 11)

Digging the channel for the caisson.  Note additional caisson section parts on shore waiting to be delivered to the bridge site., Electronic reproduction of photograph.  The Mackinac Bridge 1954 - 1958. Mackinac Bridge Authority
Abstract/Description: Digging the channel for the caisson. Note additional caisson section parts on shore waiting to be delivered to the bridge site.
Subject(s): Bridges--Design and construction
St. Ignace (Mich.)
Mackinaw City (Mich.)
Mackinac Bridge (Mich.)
Date Created: 1954 (approximate)