Marine equipment for Mackinac Bridge construction (1 of 6)

Specially made marine derrick used for many tasks during construction of the Mackinac Bridge, Electronic reproduction of text.  The Mackinac Bridge 1954 - 1958. Mackinac Bridge Authority
Abstract/Description: Specially made marine derrick used for many tasks during construction of the Mackinac Bridge
Subject(s): Bridges--Design and construction
St. Ignace (Mich.)
Mackinaw City (Mich.)
Mackinac Bridge (Mich.)
Date Created: 1957 (approximate)