Moving tower caisson for the Mackinac Bridge (2 of 11)

A ripper is pulled by a dozer to loosen up the materials under the beach so the channel can be dug to the lake at the tower caisson fabrication site at Alpena, MI, Electronic reproduction of photograph.  The Mackinac Bridge 1954 - 1958. Mackinac Bridge Authority
Abstract/Description: A ripper is pulled by a dozer to loosen up the materials under the beach so the channel can be dug to the lake at the tower caisson fabrication site at Alpena, MI
Subject(s): Bridges--Design and construction
St. Ignace (Mich.)
Mackinaw City (Mich.)
Mackinac Bridge (Mich.)
Date Created: 1954 (approximate)