Marissa Recreation Association South Lake Dam
Marissa Recreation Association South Lake Dam is an earth dam located in St. Clair County, Illinois, built in 1954. It carries a Significant hazard potential classification.
About Marissa Recreation Association South Lake Dam
The primary purpose of Marissa Recreation Association South Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Marissa Recreational Area Association (private). It impounds the Trib Mud Creek near Marissa-offstream.
The dam stands 32 feet tall and stretches 540 feet across, creates a reservoir covering 21 acres, has a maximum storage capacity of 313 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1954, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. The most recent inspection on record was 07/30/2024.
At 32 feet, this dam is taller than 76% of dams nationwide.
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Location
| State | Illinois |
| County | St. Clair |
| Nearest City | Marissa-offstream |
| River/Stream | Trib Mud Creek |
| Coordinates | 38.23445, -89.72475 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 540 ft |
| Year Completed | 1954 (72 years old) |
Storage & Hydraulics
| NID Storage | 313 acre-ft |
| Max Storage | 313 acre-ft |
| Normal Storage | 187 acre-ft |
| Surface Area | 21 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 230 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | MARISSA RECREATIONAL AREA ASSOCIATION |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not Available |
| Last Inspection | 07/30/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL00377 |
| Federal ID | IL00377 |
| More Info | State Dam Safety Program |