Grindstone-Lost-Muddy Watershed Dam B-5 Reservoir Report
Last Updated: December 5, 2025
Located in DeKalb, Missouri, the Grindstone-Lost-Muddy Watershed Dam B-5, also known as Str B-5, was completed in 1984 by the USDA NRCS.
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Summary
This earth dam, with a height of 25 feet and a length of 775 feet, serves the primary purpose of flood risk reduction along the TR-West Fork Creek. With a normal storage capacity of 61 acre-feet and a maximum storage of 530 acre-feet, the dam plays a crucial role in managing water flow and reducing the risk of flooding in the area.
Managed by the local government, the dam has a significant hazard potential and is categorized as having a moderate risk level. Despite not being state regulated, inspected, or enforced, the dam is designed to handle a maximum discharge of 1130 cubic feet per second through its uncontrolled spillway. While the condition assessment is currently not rated, the dam's emergency action plan status and risk management measures remain unspecified. As a key structure in the Rock Island District, the dam's presence highlights the importance of sustainable water resource management and climate resilience in the region.
For water resource and climate enthusiasts, the Grindstone-Lost-Muddy Watershed Dam B-5 stands as a vital asset in flood risk reduction efforts in Missouri. With its strategic location and design by the Natural Resources Conservation Service, the dam plays a crucial role in protecting the surrounding area from potential flooding events. As discussions around water security and climate change intensify, the dam serves as a tangible example of the proactive measures being taken to mitigate risks and ensure the resilience of the local community against environmental challenges.
Year Completed |
1984 |
Dam Length |
775 |
Dam Height |
25 |
River Or Stream |
TR-WEST FORK CREEK |
Primary Dam Type |
Earth |
Surface Area |
2 |
Hydraulic Height |
25 |
Drainage Area |
25.6 |
Nid Storage |
530 |
Structural Height |
25 |
Outlet Gates |
None |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
25 |
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-5