Aerial View of Mackinac Bridge Construction (26 of 77)

Aerial view of a freighter unloading aggregate into the north tower caisson. The grout plant is moving into position to do its job., Electronic reproduction of photograph.  The Mackinac Bridge 1954 - 1958. Mackinac Bridge Authority
Abstract/Description: Aerial view of a freighter unloading aggregate into the north tower caisson. The grout plant is moving into position to do its job.
Subject(s): Bridges--Design and construction
St. Ignace (Mich.)
Mackinaw City (Mich.)
Mackinac Bridge (Mich.)
Date Created: 1955 (approximate)