Lawrence Lake Dam
Lawrence Lake Dam is an earth dam located in St. Clair County, Illinois, built in 1943. It carries a High hazard potential classification.
About Lawrence Lake Dam
The primary purpose of Lawrence Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Terry Thies (private). It impounds the Trib Negro Hollow Creek near Belleville.
The dam stands 24 feet tall and stretches 164 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 132 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1943, the structure is well-established, with more than 75 years of service.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. An emergency action plan is in place for this dam. The most recent inspection on record was 06/13/2023.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Illinois dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Illinois |
| County | St. Clair |
| Nearest City | Belleville |
| River/Stream | Trib Negro Hollow Creek |
| Coordinates | 38.57724, -89.99391 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 164 ft |
| Year Completed | 1943 (83 years old) |
Storage & Hydraulics
| NID Storage | 132 acre-ft |
| Max Storage | 132 acre-ft |
| Normal Storage | 49 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 758 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | TERRY THIES |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Last Inspection | 06/13/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | IL50067 |
| Federal ID | IL50067 |
| More Info | State Dam Safety Program |