Cement delivery system for lock construction (2 of 2)

Photograph showing a close-up view of car-hopper system used to transport cement along tracks in the lock floor to site where pour is taking place.
Abstract/Description: Photograph showing a close-up view of car-hopper system used to transport cement along tracks in the lock floor to site where pour is taking place.
Subject(s): Boats and boating
Soo Locks (Mich.)
Date Created: 1911 (approximate)