Grindstone-Lost-Muddy Watershed Dam D- 5 Reservoir Report
Last Updated: December 5, 2025
Grindstone-Lost-Muddy Watershed Dam D-5, also known as Str D-5, is a critical flood risk reduction structure located in DeKalb, Missouri.
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Summary
Built in 1988 by the USDA NRCS, this earth dam stands at a height of 33 feet and spans 1450 feet in length. With a storage capacity of 1220 acre-feet and a drainage area of 193 square miles, this dam plays a vital role in managing the flow of the TR-MIDDLE FORK LOST CREEK.
Despite its low hazard potential and moderate risk assessment, this dam has not been officially rated for its current condition. While it lacks an Emergency Action Plan and updated emergency contacts, the dam's risk management measures remain unspecified. With a spillway width of 100 feet and uncontrolled spillway type, this structure ensures the safety of the surrounding area in the event of a high discharge event. As a local government-owned facility, Grindstone-Lost-Muddy Watershed Dam D-5 continues to serve its primary purpose of flood risk reduction for the community of PATTONSBURG.
Year Completed |
1988 |
Dam Length |
1450 |
Dam Height |
33 |
River Or Stream |
TR-MIDDLE FORK LOST CREEK |
Primary Dam Type |
Earth |
Surface Area |
12 |
Hydraulic Height |
33 |
Drainage Area |
193 |
Nid Storage |
1220 |
Structural Height |
33 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
33 |
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 D- 5