Lucas Lake Dam
Lucas Lake Dam is an earth dam located in Jefferson County, Missouri, built in 1960. It carries a High hazard potential classification.
About Lucas Lake Dam
The primary purpose of Lucas 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 Edwin+thelma Lucas (private). It impounds the Tr To Joachim Creek near Desoto.
The dam stands 25 feet tall, creates a reservoir covering 7 acres, has a maximum storage capacity of 94 acre-feet, and collects water from a drainage area of 150 square miles. Completed in 1960, the structure is well into its service life at over 50 years old.
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 | Jefferson |
| Nearest City | Desoto |
| River/Stream | Tr To Joachim Creek |
| Coordinates | 38.04361, -90.51527 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 94 acre-ft |
| Max Storage | 94 acre-ft |
| Normal Storage | 35 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 150 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | EDWIN+THELMA LUCAS |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO30454 |
| Federal ID | MO30454 |
| More Info | State Dam Safety Program |