Favorite this☆ Lock pit, St. Mary's Falls Canal, Sault Ste. Marie Description: Construction site of St. Mary's Falls Canal lock pit, with railroad tracks and workers in pit and boat masts in background. Printed on front of photo: "July 31, 1890." Details Resource ID: DPA0737 Subject: Locks (Hydraulic engineering)--Michigan--Sault Sainte Marie Locks (Hydraulic engineering)--Design and construction Soo Locks (Mich.) Albumen prints Photographic prints Date Issued: 1890-07-31 Format: 1 photographic print mounted on mat board ; image 7.25 x 9 in. Member of: Burton Historical Collection Filing Location: M/Localities-Sault Ste. Marie Rights: Physical rights are retained by DPL. Copyright is retained in accordance with U.S. copyright laws.