Construction of Davis Lock

Photograph showing the giant forms for pouring concrete walls of the Davis Lock in the left and right foreground. A pour is taking place on the left wall with an overhead traveling hopper delivering the concrete.
Abstract/Description: Photograph showing the giant forms for pouring concrete walls of the Davis Lock in the left and right foreground. A pour is taking place on the left wall with an overhead traveling hopper delivering the concrete.
Subject(s): Boats and boating
Soo Locks (Mich.)
Date Created: 1912 (approximate)