Lake Tanglewood Dam
High HazardNot Available ConditionEmergency Action Plan: Yes
Location
| State | Illinois |
| County | Marshall |
| Nearest City | HENRY |
| River/Stream | TRIB SANDY CREEK |
| Coordinates | 41.07995, -89.26482 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 40 ft |
| Dam Height | 40 ft |
| Dam Length | 375 ft |
| Year Completed | 1969 (57 years old) |
Storage & Hydraulics
| NID Storage | 161 acre-ft |
| Max Storage | 161 acre-ft |
| Normal Storage | 97 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | LAKE WILDWOOD ASSOCIATION, INC. |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Last Inspection | 05/06/2025 |
| Emergency Action Plan | Yes |