Tower caisson for the Mackinac Bridge (26 of 45)

Ring No. 17 was added of the 20 required to pier 19, the north tower pier  (1), Electronic reproduction of photograph.  The Mackinac Bridge 1954 - 1958. Mackinac Bridge Authority
Abstract/Description: Ring No. 17 was added of the 20 required to pier 19, the north tower pier (1)
Subject(s): Bridges--Design and construction
St. Ignace (Mich.)
Mackinaw City (Mich.)
Mackinac Bridge (Mich.)
Date Created: 1955-01