Lake Tanglewood Dam
Illinois — Marshall County — TRIB SANDY CREEK
Location
| State | Illinois |
| County | Marshall |
| River | TRIB SANDY CREEK |
| Coordinates | 41.07995, -89.26482 |
Physical Characteristics
| NID Height | 40 ft |
| Dam Height | 40 ft |
| Dam Length | 375 ft |
| NID Storage | 161 acre-ft |
| Max Storage | 161 acre-ft |
| Surface Area | — |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Not Available |
| EAP Status | Yes |
| Last Inspection | May 4, 2026 |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | 1969 |
| Primary Purpose | Recreation |
| Dam Type | Earth |
| Owner Type | Private |
| Owner | LAKE WILDWOOD ASSOCIATION, INC. |
| Other Name | Lake Tanglewood |
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.