Excavation for Poe Lock

Photograph showing both horses and steam power being used in the excavation for the first Poe Lock. The ledge of sandstone being removed is seen in the center of the image.
Abstract/Description: Photograph showing both horses and steam power being used in the excavation for the first Poe Lock. The ledge of sandstone being removed is seen in the center of the image.
Subject(s): Boats and boating
Soo Locks (Mich.)
Date Created: 1890-07-31