Grindstone-Lost-Muddy Watershed Dam B-22 Reservoir Report
Last Updated: December 5, 2025
Grindstone-Lost-Muddy Watershed Dam B-22, located in DeKalb County, Missouri, is a vital structure for grade stabilization along the TR-West Fork Creek.
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Summary
Built in 1973 by the USDA NRCS, this earth dam stands at 30 feet tall and spans 600 feet in length, with a storage capacity of 283 acre-feet. The dam serves a primary purpose of grade stabilization, ensuring the protection of surrounding areas from erosion and sedimentation.
With a low hazard potential and a moderate risk assessment, Grindstone-Lost-Muddy Watershed Dam B-22 is a crucial component of the local water resource management system. Despite not being state-regulated or inspected, the dam continues to fulfill its role effectively. The surrounding area benefits from the dam's presence, as it helps to control the flow of water and mitigate potential flooding in the region.
Managed by the local government and with no current enforcement or regulatory agency overseeing its operations, Grindstone-Lost-Muddy Watershed Dam B-22 remains a reliable structure designed to withstand hydraulic pressures and prevent potential disasters. As part of the Rock Island District and situated in a picturesque location in Pattonburg, this dam stands as a testament to effective water resource management and climate mitigation efforts in the area.
Year Completed |
1973 |
Dam Length |
600 |
Dam Height |
30 |
River Or Stream |
TR-WEST FORK CREEK |
Primary Dam Type |
Earth |
Surface Area |
6 |
Hydraulic Height |
30 |
Drainage Area |
57.6 |
Nid Storage |
283 |
Structural Height |
30 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
30 |
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-22