Wall form framework for lock

Photograph showing a view, looking southwest, of the movable (on tracks) steel-truss frames that supported the forms used to pour wall sections. View taken near east end of lock chamber.
Abstract/Description: Photograph showing a view, looking southwest, of the movable (on tracks) steel-truss frames that supported the forms used to pour wall sections. View taken near east end of lock chamber.
Subject(s): Boats and boating
Soo Locks (Mich.)
Date Created: 1912 (approximate)