Tower derrick used for Mackinac Bridge construction (1 of 6)

During construction of all phases of the tower and other parts within reach, the derricks atop each tower played a huge roll in materials handling.  The derricks were removed when the job was completed., Electronic reproduction of text.  The Mackinac Bridge 1954 - 1958. Mackinac Bridge Authority
Abstract/Description: During construction of all phases of the tower and other parts within reach, the derricks atop each tower played a huge roll in materials handling. The derricks were removed when the job was completed.
Subject(s): Bridges--Design and construction
St. Ignace (Mich.)
Mackinaw City (Mich.)
Mackinac Bridge (Mich.)
Date Created: 1957 (approximate)