Hidden Valley Lake Dam Reservoir Report
Nearby: Foerster Dam Parker Lake Dam No. 2
Last Updated: December 6, 2025
Hidden Valley Lake Dam, located in Minnith, Missouri, is a privately owned earth dam built in 1975 primarily for recreational purposes.
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Summary
The dam stands at a height of 32 feet and has a storage capacity of 479 acre-feet, with a normal storage level of 305 acre-feet. The dam is situated on Brushy Creek in Ste. Genevieve County and covers a surface area of 28 acres.
Despite not being regulated by the state, Hidden Valley Lake Dam has a high hazard potential, although its condition assessment is currently listed as "Not Rated." The last inspection of the dam took place in 1979, indicating a need for updated assessments and emergency action plans. The dam's location within a drainage area of 1130 square miles raises concerns about its ability to manage potential flooding events effectively.
Water resource and climate enthusiasts may find Hidden Valley Lake Dam an intriguing case study for private dam ownership and the responsibilities that come with managing a structure of significant hazard potential. The dam's history, design, and lack of recent inspections highlight the importance of ongoing maintenance and risk assessment to ensure the safety of both the dam and the surrounding community.
Year Completed |
1975 |
Dam Height |
32 |
River Or Stream |
BRUSHY CREEK |
Primary Dam Type |
Earth |
Surface Area |
28 |
Drainage Area |
1130 |
Nid Storage |
479 |
Structural Height |
32 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
32 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Hidden Valley Lake Dam