Grindstone-Lost-Muddy Watershed Dam C- 6 Reservoir Report
Last Updated: December 5, 2025
Grindstone-Lost-Muddy Watershed Dam C-6, also known as Str C-6, is a local government-owned earth dam located in DeKalb, Missouri.
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Summary
Designed by USDA NRCS and completed in 1988, this dam serves the primary purpose of flood risk reduction along the TR-LOST CREEK. With a height of 34 feet and a length of 700 feet, the dam has a storage capacity of 495 acre-feet and a drainage area of 57.6 square miles.
The dam features a stone core and soil foundation, with an uncontrolled spillway width of 50 feet. Despite being classified as having a low hazard potential, the dam's risk assessment is moderate (3). Currently, the dam's condition is not rated, and it has not undergone recent inspection or maintenance. While there are no associated structures or outlet gates, the dam plays a crucial role in managing floodwaters and protecting the surrounding area from potential inundation.
In the event of an emergency, the dam's Emergency Action Plan (EAP) status is unknown, and it is unclear if the EAP meets guidelines or if risk management measures have been implemented. With its strategic location and critical role in flood risk reduction, Grindstone-Lost-Muddy Watershed Dam C-6 stands as a testament to the importance of proper infrastructure in safeguarding communities against the impacts of extreme weather events and climate change.
Year Completed |
1988 |
Dam Length |
700 |
Dam Height |
34 |
River Or Stream |
TR-LOST CREEK |
Primary Dam Type |
Earth |
Surface Area |
2 |
Hydraulic Height |
34 |
Drainage Area |
57.6 |
Nid Storage |
495 |
Structural Height |
34 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
34 |
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 C- 6