A man poses for a picture under a large cylinder built into the wall of the Bear Trap Dam at the base of the Chicago Sanitary and Ship Canal at Lockport.
Trustees of the Sanitary District of Chicago pose for a group photo at the base of the Chicago Sanitary and Ship Canal at Lockport. The Bear Trap Dam is visible in the background on the left.
4450 pounds of dynamite sits in boxes in preparation for use blasting sections of the Chicago Sanitary and Ship Canal during construction. Photo caption: "1376 6-28-99 Danger!! 4,450lbs. Dynamite."