Temporary trestle at Soo Locks

Photograph showing the excavation pit with a temporary trestle and track in the foreground used for removing spoils from the blasting operation.
Abstract/Description: Photograph showing the excavation pit with a temporary trestle and track in the foreground used for removing spoils from the blasting operation.
Subject(s): Boats and boating
Soo Locks (Mich.)
Date Created: 1910 (approximate)