Tower caisson for the Mackinac Bridge (17 of 45)

Ring number 16 is assembled on this tower caisson for pier No. 19  (1), Electronic reproduction of photograph.  The Mackinac Bridge 1954 - 1958. Mackinac Bridge Authority
Abstract/Description: Ring number 16 is assembled on this tower caisson for pier No. 19 (1)
Subject(s): Bridges--Design and construction
St. Ignace (Mich.)
Mackinaw City (Mich.)
Mackinac Bridge (Mich.)
Date Created: 1954 (approximate)