Allen Lake Dam
Allen Lake Dam is an earth dam located in Clay County, Missouri, built in 1961. It carries a High hazard potential classification.
About Allen Lake Dam
The primary purpose of Allen Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by William R Allen (private). It impounds the Tr To Fishing River near Mosby.
The dam stands 28 feet tall, creates a reservoir covering 20 acres, has a maximum storage capacity of 300 acre-feet, and collects water from a drainage area of 300 square miles. Completed in 1961, 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 | Clay |
| Nearest City | Mosby |
| River/Stream | Tr To Fishing River |
| Coordinates | 39.35926, -94.42928 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Year Completed | 1961 (65 years old) |
Storage & Hydraulics
| NID Storage | 300 acre-ft |
| Max Storage | 300 acre-ft |
| Normal Storage | 186 acre-ft |
| Surface Area | 20 acres |
| Drainage Area | 300 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | WILLIAM R ALLEN |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO10017 |
| Federal ID | MO10017 |
| More Info | State Dam Safety Program |