Black Tern Marsh Dam
Illinois — McHenry County — TRIB FOX RIVER
Location
| State | Illinois |
| County | McHenry |
| River | TRIB FOX RIVER |
| Coordinates | 42.30533, -88.24556 |
Physical Characteristics
| NID Height | 7 ft |
| Dam Height | 7 ft |
| Dam Length | 1,500 ft |
| NID Storage | 250 acre-ft |
| Max Storage | 250 acre-ft |
| Surface Area | — |
Safety Classification
| Hazard Potential | Low |
| Condition Assessment | Not Available |
| EAP Status | No |
| Last Inspection | October 31, 2023 |
| Inspection Frequency | 5 |
Dam Information
| Year Completed | 1992 |
| Primary Purpose | Recreation |
| Dam Type | Earth |
| Owner Type | State |
| Owner | ILLINOIS DEPARTMENT OF NATURAL RESOURCES |
| Other Name | Moraine Hills Mitigation 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.