Soo Locks. Close-up of a depth gauge on the wall of a lock at the Soo Locks Sault Ste Marie, Michigan, USA. These locks on the St. Mary's River enable shipping between Lake Superior and the lower Great Lakes. They are operated by the US Army Corps of Engineers, and raise or lower ships 21 feet. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / West, Jim |
Bildgröße: | 4369 px × 6554 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |