Aggregate plant for lock construction (1 of 3)

Photograph of an aggregate plant, set up in preparation for mixing concrete used to pour piers, walls and floor of the Davis Lock. The sign on the structure reads "Great Lakes Dredge and Dock Chicago…Buffalo,…Amherstburg."
Abstract/Description: Photograph of an aggregate plant, set up in preparation for mixing concrete used to pour piers, walls and floor of the Davis Lock. The sign on the structure reads "Great Lakes Dredge and Dock Chicago…Buffalo,…Amherstburg."
Subject(s): Boats and boating
Soo Locks (Mich.)
Date Created: 1912 (approximate)