US Army Corps of Engineers
Detroit District Website

Breakwall maintenance at Calumet Harbor
The Manitowoc Crane Barge lays down a cut stone, weighing up to nine tons, at the Calumet Harbor breakwall during summer maintenance.

Download Image: Full Size (0.18 MB)
Tags: great lakes
Photo by: US Army Corps of Engineers |  VIRIN: 130704-A-CE999-015.JPG