Survey tower in the Straits of Mackinac (5 of 5)

An engineer takes readings from tower No-1 located in the Straits of Mackinac., Electronic reproduction of photograph.  The Mackinac Bridge 1954 - 1958. Mackinac Bridge Authority
Abstract/Description: An engineer takes readings from tower No-1 located in the Straits of Mackinac.
Subject(s): Bridges--Design and construction
St. Ignace (Mich.)
Mackinaw City (Mich.)
Mackinac Bridge (Mich.)
Date Created: 1954 (approximate)