Hopper of concrete during lock construction

Photograph showing a large hopper of cement being transferred from the stationary crane to a railcar, which will be brought to the movable crane at the pour site in the background. The finished wall appears to the right of the crane in the background, and the giant forms (triangular in shape) appear to the left of the crane.
Abstract/Description: Photograph showing a large hopper of cement being transferred from the stationary crane to a railcar, which will be brought to the movable crane at the pour site in the background. The finished wall appears to the right of the crane in the background, and the giant forms (triangular in shape) appear to the left of the crane.
Subject(s): Boats and boating
Soo Locks (Mich.)
Date Created: 1912 (approximate)