Tower for the Mackinac Bridge going up (7 of 11)

The floating derrick is setting up the creeper crane, Electronic reproduction of text.  The Mackinac Bridge 1954 - 1958. Mackinac Bridge Authority
Abstract/Description: The floating derrick is setting up the creeper crane
Subject(s): Bridges--Design and construction
St. Ignace (Mich.)
Mackinaw City (Mich.)
Mackinac Bridge (Mich.)
Date Created: 1955 (approximate)