Creeper assembled for Mackinac Bridge construction (4 of 4)

This climbing crane made the tower assembly go fast., Electronic reproduction of text.  The Mackinac Bridge 1954 - 1958. Mackinac Bridge Authority
Abstract/Description: This climbing crane made the tower assembly go fast.
Subject(s): Bridges--Design and construction
St. Ignace (Mich.)
Mackinaw City (Mich.)
Mackinac Bridge (Mich.)
Date Created: 1955 (approximate)