Ylsa Lake Dam
Illinois — Monroe County — TRIB ROCKHOUSE CREEK
Location
| State | Illinois |
| County | Monroe |
| River | TRIB ROCKHOUSE CREEK |
| Coordinates | 38.28322, -90.08269 |
Physical Characteristics
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 370 ft |
| NID Storage | 22 acre-ft |
| Max Storage | 22 acre-ft |
| Surface Area | 2 acres |
Safety Classification
| Hazard Potential | Significant |
| Condition Assessment | Not Available |
| EAP Status | Yes |
| Last Inspection | October 21, 2025 |
| Inspection Frequency | 3 |
Dam Information
| Year Completed | 1995 |
| Primary Purpose | Recreation |
| Dam Type | Earth |
| Owner Type | Private |
| Owner | LONNIE FULTE |
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.