Tower caisson for the Mackinac Bridge (30 of 45)

Cranes using clam buckets remove overburden from within the tower caisson.  As material was removed, resistance was lowered at the cutting edge of the caisson which allowed it to cut its way to bedrock.  It worked like a cookie cutter., Electronic reproduction of photograph.  The Mackinac Bridge 1954 - 1958. Mackinac Bridge Authority
Abstract/Description: Cranes using clam buckets remove overburden from within the tower caisson. As material was removed, resistance was lowered at the cutting edge of the caisson which allowed it to cut its way to bedrock. It worked like a cookie cutter.
Subject(s): Bridges--Design and construction
St. Ignace (Mich.)
Mackinaw City (Mich.)
Mackinac Bridge (Mich.)
Date Created: 1954 (approximate)