Grindstone-Lost-Muddy Watershed Dam F-61 Reservoir Report
Last Updated: December 19, 2025
Grindstone-Lost-Muddy Watershed Dam F-61, located in DeKalb, Missouri, is a crucial structure designed by the USDA NRCS for Grade Stabilization purposes.
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Summary
Completed in 1975, this earth dam stands at a height of 29 feet and spans 600 feet in length. With a storage capacity of 129 acre-feet and a drainage area of 303 square miles, this dam plays a significant role in managing the flow of TR-Grindstone Creek.
Despite being categorized as having a low hazard potential, the dam is deemed to have a moderate risk level, highlighting the importance of regular inspections and maintenance. With a spillway width of 40 feet and a maximum discharge capacity of 290 cubic feet per second, the dam is equipped to handle excess water during heavy rainfall events. While the condition of the dam is currently not rated, its critical role in flood control and water resource management underscores the need for ongoing monitoring and risk management measures to ensure its effectiveness and safety for the surrounding community.
Owned by the local government and situated within the Rock Island District, Grindstone-Lost-Muddy Watershed Dam F-61 serves as a key component in the region's water infrastructure. Its primary purpose of Grade Stabilization underscores its significance in preventing erosion and maintaining the stability of the surrounding area. As climate change continues to impact water resources, the role of structures like Dam F-61 becomes increasingly vital in safeguarding communities against the threats of flooding and water scarcity.
Year Completed |
1975 |
Dam Length |
600 |
Dam Height |
29 |
River Or Stream |
TR-GRINDSTONE CREEK |
Primary Dam Type |
Earth |
Surface Area |
8 |
Hydraulic Height |
29 |
Drainage Area |
303 |
Nid Storage |
129 |
Structural Height |
29 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
29 |
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 F-61