Grindstone-Lost-Muddy Watershed Dam Lt-160 Reservoir Report
Last Updated: December 5, 2025
Grindstone-Lost-Muddy Watershed Dam Lt-160, also known as Greg Pottratz Land Treatment Dam T160, is a local government-owned structure located in DeKalb, Missouri.
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Summary
Built in 1985 by the USDA NRCS, this earth dam serves the primary purpose of grade stabilization along Lost Creek. Standing at a height of 30 feet and with a length of 390 feet, the dam has a storage capacity of 24 acre-feet and covers a surface area of 19 acres.
With a low hazard potential and a moderate risk assessment rating, this dam plays a crucial role in managing water resources in the region. Despite not being state regulated or inspected, the structure remains in good condition and has not been rated. Equipped with an uncontrolled spillway and no outlet gates, the Grindstone-Lost-Muddy Watershed Dam Lt-160 serves as a vital component in the overall water management system of the area, providing stability and control over water flow.
For water resource and climate enthusiasts, this dam represents a key infrastructure project designed to enhance the natural landscape and protect against potential hazards. Its construction by the Natural Resources Conservation Service highlights the importance of sustainable land treatment practices in maintaining a healthy ecosystem. As a notable feature within the Rock Island District, this dam stands as a testament to collaborative efforts to safeguard water resources and mitigate environmental risks in the region.
Year Completed |
1985 |
Dam Length |
390 |
Dam Height |
30 |
River Or Stream |
LOST CREEK |
Primary Dam Type |
Earth |
Surface Area |
19 |
Hydraulic Height |
30 |
Drainage Area |
341 |
Nid Storage |
24 |
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 Lt-160