Stratton Lock and Dam
Illinois — McHenry County — FOX RIVER
Location
| State | Illinois |
| County | McHenry |
| River | FOX RIVER |
| Coordinates | 42.30917, -88.25139 |
Physical Characteristics
| NID Height | 7 ft |
| Dam Height | 7 ft |
| Dam Length | 275 ft |
| NID Storage | 113,000 acre-ft |
| Max Storage | 113,000 acre-ft |
| Surface Area | 8,700 acres |
Safety Classification
| Hazard Potential | Significant |
| Condition Assessment | Not Available |
| EAP Status | Yes |
| Last Inspection | October 3, 2025 |
| Inspection Frequency | 3 |
Dam Information
| Year Completed | 1939 |
| Primary Purpose | Flood Risk Reduction |
| Dam Type | Gravity |
| Owner Type | State |
| Owner | ILLINOIS DEPARTMENT OF NATURAL RESOURCES |
| Other Name | Mchenry Lock and Dam |
Location Map
About This Dam Record
Dam safety data is maintained by the Army Corps of Engineers National Inventory of Dams (NID). High-hazard dams are those where failure could cause loss of life or major property damage downstream.