Vessels used during Mackinac Bridge construction (7 of 14)

Self unloading steam ships continued to deliver aggregate while other vessels transited the Straits of Mackinac.  This is a very busy place in the Great Lakes and vessels passage is continuous through out the shipping season., Electronic reproduction of photograph.  The Mackinac Bridge 1954 - 1958. Mackinac Bridge Authority
Abstract/Description: Self unloading steam ships continued to deliver aggregate while other vessels transited the Straits of Mackinac. This is a very busy place in the Great Lakes and vessels passage is continuous through out the shipping season.
Subject(s): Bridges--Design and construction
St. Ignace (Mich.)
Mackinaw City (Mich.)
Mackinac Bridge (Mich.)
Date Created: 1955 (approximate)