Grindstone-Lost-Muddy Watershed Dam B- 7 Reservoir Report
Last Updated: December 5, 2025
Grindstone-Lost-Muddy Watershed Dam B- 7, located in DeKalb, Missouri, was completed in 1985 and serves as a vital infrastructure for flood risk reduction along the TR-West Fork Lost Creek.
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Summary
Designed by USDA NRCS, this earth dam stands at a height of 27 feet and has a length of 750 feet, with a storage capacity of 380 acre-feet. The dam's primary purpose is flood risk reduction, with a low hazard potential and a moderate risk assessment rating.
With a surface area of 6 acres and a drainage area of 89.6 square miles, Grindstone-Lost-Muddy Watershed Dam B- 7 plays a crucial role in managing water flow and protecting the surrounding areas from potential flooding. The dam features an uncontrolled spillway with a width of 60 feet and no outlet gates. Despite being in a low hazard category, the dam's risk assessment indicates a moderate level of risk, highlighting the importance of ongoing monitoring and maintenance to ensure its continued effectiveness in flood risk reduction.
Owned and operated by the local government, Grindstone-Lost-Muddy Watershed Dam B- 7 has not been rated for its condition assessment and has no emergency action plan prepared. With its strategic location and design, this dam stands as a key component in the water resource management infrastructure of the area, providing essential protection against potential flood events and safeguarding the community and environment from the impacts of extreme weather conditions.
Year Completed |
1985 |
Dam Length |
750 |
Dam Height |
27 |
River Or Stream |
TR-WEST FORK LOST CREEK |
Primary Dam Type |
Earth |
Surface Area |
6 |
Hydraulic Height |
27 |
Drainage Area |
89.6 |
Nid Storage |
380 |
Structural Height |
27 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
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.
Grindstone-Lost-Muddy Watershed Dam B- 7