Soo Locks
Significant HazardNot Available ConditionEmergency Action Plan: Yes
Location
| State | Michigan |
| County | Chippewa |
| Nearest City | SAULT STE MARIE |
| River/Stream | ST MARY S |
| Coordinates | 46.50422, -84.34961 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 17 ft |
| Dam Length | 968 ft |
| Year Completed | 1921 (105 years old) |
Storage & Hydraulics
| NID Storage | 277,540,000 acre-ft |
| Max Storage | 277,540,000 acre-ft |
| Normal Storage | 277,540,000 acre-ft |
| Surface Area | 20,255,000 acres |
| Drainage Area | 181,000 sq mi |
| Max Discharge | 68,000 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Navigation |
| Owner | Canada;USACE - Detroit District |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Condition Assessment | Not Available |
| Last Inspection | 06/13/2025 |
| Emergency Action Plan | Yes |