Lake Hannibal Dam
Lake Hannibal Dam is an earth dam located in Ralls County, Missouri, built in 1967. It carries a High hazard potential classification.
About Lake Hannibal Dam
The primary purpose of Lake Hannibal Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Tom L. Hulse (private). It impounds the Tr-big Creek near Rensselaer.
The dam stands 18 feet tall, creates a reservoir covering 14 acres, has a maximum storage capacity of 140 acre-feet, and collects water from a drainage area of 340 square miles. Completed in 1967, 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. The most recent inspection on record was 09/19/1990. That was 35 years ago — unusually long for a high-hazard dam, which typically requires more frequent inspections.
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 | Ralls |
| Nearest City | Rensselaer |
| River/Stream | Tr-big Creek |
| Coordinates | 39.66872, -91.53980 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 140 acre-ft |
| Max Storage | 140 acre-ft |
| Normal Storage | 140 acre-ft |
| Surface Area | 14 acres |
| Drainage Area | 340 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | TOM L. HULSE |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not Rated |
| Last Inspection | 09/19/1990 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO10061 |
| Federal ID | MO10061 |
| More Info | State Dam Safety Program |