Columbia Lakes South Lake Dam
Illinois — Monroe County — TRIB PALMER CREEK
Location
| State | Illinois |
| County | Monroe |
| River | TRIB PALMER CREEK |
| Coordinates | 38.47044, -90.21802 |
Physical Characteristics
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 245 ft |
| NID Storage | 126 acre-ft |
| Max Storage | 126 acre-ft |
| Surface Area | 9 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Not Available |
| EAP Status | Yes |
| Last Inspection | November 14, 2025 |
| Inspection Frequency | 3 |
Dam Information
| Year Completed | 1990 |
| Primary Purpose | Recreation |
| Dam Type | Earth |
| Owner Type | Private |
| Owner | COLUMBIA LAKES HOMEOWNERS ASSOCIATIONS |
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.