Hidden Valley Lake Dam
Hidden Valley Lake Dam is an earth dam located in Ray County, Missouri. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Hidden Valley Lake Dam
The primary purpose of Hidden Valley Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is private-owned. It impounds the Tr To Rocky Fork near Hardin.
The dam stands 52 feet tall and stretches 830 feet across, creates a reservoir covering 28 acres, has a maximum storage capacity of 454 acre-feet, and collects water from a drainage area of 0 square miles.
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 01/18/2023.
At 52 feet, this dam is taller than 93% 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 | Ray |
| Nearest City | Hardin |
| River/Stream | Tr To Rocky Fork |
| Coordinates | 39.39256, -94.12304 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 52 ft |
| Dam Height | 52 ft |
| Dam Length | 830 ft |
Storage & Hydraulics
| NID Storage | 454 acre-ft |
| Max Storage | 454 acre-ft |
| Normal Storage | 454 acre-ft |
| Surface Area | 28 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 998 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 01/18/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MO11237 |
| Federal ID | MO11237 |
| More Info | State Dam Safety Program |