Pockets for gates in lock wall

Photograph showing a view from the upper end of the south wall, looking east. The curved "pockets" for the upper gates appear in the wall, as well as the curved gate sills (convex toward the viewer) in the floor.
Abstract/Description: Photograph showing a view from the upper end of the south wall, looking east. The curved "pockets" for the upper gates appear in the wall, as well as the curved gate sills (convex toward the viewer) in the floor.
Subject(s): Boats and boating
Soo Locks (Mich.)
Date Created: 1913 (approximate)