Diving during Mackinac Bridge construction

A hardhat diver preparing to descend the depths of the Straits of Mackinac to inspect the work, Electronic reproduction of photograph.  The Mackinac Bridge 1954 - 1958. Mackinac Bridge Authority
Abstract/Description: A hardhat diver preparing to descend the depths of the Straits of Mackinac to inspect the work
Subject(s): Bridges--Design and construction
St. Ignace (Mich.)
Mackinaw City (Mich.)
Mackinac Bridge (Mich.)
Date Created: 1954 (approximate)