Lake Mcmaster Dam
High HazardNot Available ConditionEmergency Action Plan: Yes
Location
| State | Illinois |
| County | Knox |
| Nearest City | DAHINDA |
| River/Stream | SNAKEDEN CREEK |
| Coordinates | 41.00508, -90.07193 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 81 ft |
| Dam Height | 81 ft |
| Dam Length | 850 ft |
| Year Completed | 1981 (45 years old) |
Storage & Hydraulics
| NID Storage | 5,350 acre-ft |
| Max Storage | 5,350 acre-ft |
| Normal Storage | 4,920 acre-ft |
| Surface Area | 178 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 4,125 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | ILLINOIS DEPARTMENT OF NATURAL RESOURCES |
| Owner Type | State |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Last Inspection | 09/09/2025 |
| Emergency Action Plan | Yes |