Print, Photographic

Black and white aerial photo of the Soo Locks taken from the northwest. A freighter has just exited the Davis Lock, and is headed west, while another follows behind it. The Sault Ste. Marie International Railway bridge spans the canals. Both the Canadian and American cities of Sault Ste. Marie are in view. "An aerial view of the four U.S. Soo Locks and showing the North and South Canals and, to left, a glimpse of the St. Mary's rapids. Peak passage in one 24 hour day through the Locks hits 100 freighters at height of season... daily average around 70 vessels. Photo courtesy of Army Corps of Engineers," is typewritten on a caption pasted to the verso.