Forms for wall sections for lock

Photograph showing a close-up view of the giant forms used to pour wall sections. The steel-truss framework supports the surface used to create the lock side of the wall, and the vertical planks with braces form the outside part of the wall.
Abstract/Description: Photograph showing a close-up view of the giant forms used to pour wall sections. The steel-truss framework supports the surface used to create the lock side of the wall, and the vertical planks with braces form the outside part of the wall.
Subject(s): Boats and boating
Soo Locks (Mich.)
Date Created: 1912 (approximate)