Happy Holler Dam
Happy Holler Dam is an earth dam located in Andrew County, Missouri, built in 1995. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Happy Holler Dam
The primary purpose of Happy Holler Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Mo Dept Of Conservation (state). It impounds the Platte River near Whitesville.
The dam stands 43 feet tall and stretches 843 feet across, creates a reservoir covering 62 acres, has a maximum storage capacity of 805 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1995, the structure is 31 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 03/22/2021.
At 43 feet, this dam is taller than 89% of dams nationwide.
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 | Whitesville |
| River/Stream | Platte River |
| Coordinates | 40.02611, -94.73233 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 43 ft |
| Dam Height | 43 ft |
| Dam Length | 843 ft |
| Year Completed | 1995 (31 years old) |
Storage & Hydraulics
| NID Storage | 805 acre-ft |
| Max Storage | 805 acre-ft |
| Normal Storage | 805 acre-ft |
| Surface Area | 62 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 9,118 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | MO DEPT OF CONSERVATION |
| Owner Type | State |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 03/22/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MO12380 |
| Federal ID | MO12380 |
| More Info | State Dam Safety Program |