Drilling Apparatus?, Davis Lock (1 of 2)

Photograph showing machinery used in Davis Lock excavation. Towers in the background appear to serve as part of an aerial transport system to get materials across the upper canal approach.
Abstract/Description: Photograph showing machinery used in Davis Lock excavation. Towers in the background appear to serve as part of an aerial transport system to get materials across the upper canal approach.
Subject(s): Boats and boating
Soo Locks (Mich.)
Date Created: 1909 (approximate)