Grindstone Glm C-4 Dam Reservoir Report
Last Updated: December 5, 2025
Grindstone Glm C-4 Dam, also known as Grindstone Lost-Muddy-Creek Site C-4, is a state-owned structure in DeKalb, Missouri, designed by the USDA NRCS and completed in 1988.
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Summary
This Earth-type dam stands at 38 feet tall and spans 900 feet, serving primarily for flood risk reduction on the TRIB LOST CREEK. With a storage capacity of 211 acre-feet and a surface area of 40 acres, the dam plays a crucial role in managing water resources in the region.
Despite its low hazard potential and satisfactory condition assessment, Grindstone Glm C-4 Dam undergoes regular state inspections, with the last one conducted in September 2013. The dam features an uncontrolled spillway with a width of 140 feet and a slide (sluice gate) outlet gate. Located in a moderately risk-prone area, the dam is equipped with emergency action plans and risk management measures to ensure the safety of the surrounding community. With its strategic location and design, Grindstone Glm C-4 Dam is a key component in the water resource infrastructure of Missouri, contributing to the overall climate resilience of the region.
Year Completed |
1988 |
Dam Length |
900 |
Dam Height |
38 |
River Or Stream |
TRIB LOST CREEK |
Primary Dam Type |
Earth |
Surface Area |
40 |
Drainage Area |
3322 |
Nid Storage |
211 |
Structural Height |
38 |
Outlet Gates |
Slide (sluice gate) |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
38 |
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 Glm C-4 Dam