Thompson Lake Dam
Thompson Lake Dam is an earth dam located in Andrew County, Missouri, built in 1936. It carries a High hazard potential classification.
About Thompson Lake Dam
The primary purpose of Thompson Lake Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Roger Carson (private). It impounds the Tr-caples Creek near Amazonia.
The dam stands 30 feet tall, creates a reservoir covering 7 acres, has a maximum storage capacity of 112 acre-feet, and collects water from a drainage area of 180 square miles. Completed in 1936, 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.
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 Missouri 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 | Missouri |
| County | Andrew |
| Nearest City | Amazonia |
| River/Stream | Tr-caples Creek |
| Coordinates | 39.95348, -94.87968 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Year Completed | 1936 (90 years old) |
Storage & Hydraulics
| NID Storage | 112 acre-ft |
| Max Storage | 112 acre-ft |
| Normal Storage | 51 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 180 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | ROGER CARSON |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO10720 |
| Federal ID | MO10720 |
| More Info | State Dam Safety Program |