Lake Minnie Ha-ha Dam,lower
Lake Minnie Ha-ha Dam,lower is an earth dam located in Ste. Genevieve County, Missouri, built in 1963. It carries a High hazard potential classification.
About Lake Minnie Ha-ha Dam,lower
The primary purpose of Lake Minnie Ha-ha Dam,lower is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Lake Minnie Ha-ha,inc. (private). It impounds the Tributary To Saline Creek near St.marys.
The dam stands 27 feet tall, creates a reservoir covering 6 acres, has a maximum storage capacity of 87 acre-feet, and collects water from a drainage area of 282 square miles. Completed in 1963, 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 09/19/1979. That was 46 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 | Ste. Genevieve |
| Nearest City | St.marys |
| River/Stream | Tributary To Saline Creek |
| Coordinates | 37.80993, -90.05958 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 87 acre-ft |
| Max Storage | 87 acre-ft |
| Normal Storage | 53 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 282 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | LAKE MINNIE HA-HA,INC. |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not Rated |
| Last Inspection | 09/19/1979 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO30644 |
| Federal ID | MO30644 |
| More Info | State Dam Safety Program |