Columbia Lakes South Lake Dam
High HazardNot Available ConditionEmergency Action Plan: Yes
Location
| State | Illinois |
| County | Monroe |
| Nearest City | MILLSTADT JUNCTION |
| River/Stream | TRIB PALMER CREEK |
| Coordinates | 38.47044, -90.21802 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 245 ft |
| Year Completed | 1990 (36 years old) |
Storage & Hydraulics
| NID Storage | 126 acre-ft |
| Max Storage | 126 acre-ft |
| Normal Storage | 47 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 7 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | COLUMBIA LAKES HOMEOWNERS ASSOCIATIONS |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Last Inspection | 11/14/2025 |
| Emergency Action Plan | Yes |