Upper Locust Creek W-121 Reservoir Report
Last Updated: December 12, 2025
Upper Locust Creek W-121 is a local government-owned earth dam located in Reger, Missouri, along TR-LOCUST CREEK.
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Summary
Designed by the USDA NRCS and completed in 2005, this structure primarily serves the purpose of flood risk reduction, with additional benefits for fire protection, stock, fish and wildlife ponds. Standing at a height of 24.4 feet, with a hydraulic height of 24 feet and a structural height of 29 feet, the dam spans a length of 550 feet and has a reservoir storage capacity of 106.6 acre-feet.
With a low hazard potential and a moderate risk assessment rating of 3, Upper Locust Creek W-121 plays a vital role in managing water resources in the region. The dam has a normal storage capacity of 31.5 acre-feet and can discharge a maximum of 141.2 cubic feet per second. Despite not being regulated by the state, this structure provides essential flood protection and water storage for the surrounding area. While its condition assessment is not rated and inspection frequency is unknown, the dam's strategic location and design underscore its significance in mitigating potential water-related risks.
Managed by the Natural Resources Conservation Service and situated within the Rock Island District, Upper Locust Creek W-121 stands as a testament to effective water resource management and infrastructure for flood control. Its uncontrolled spillway and outlet gates reflect a simple yet functional design tailored to address the region's specific needs. As climate change continues to impact water availability and extreme weather events, structures like Upper Locust Creek W-121 play a crucial role in safeguarding communities and ecosystems against the adverse effects of unpredictable hydrological patterns.
Year Completed |
2005 |
Dam Length |
550 |
Dam Height |
24.4 |
River Or Stream |
TR-LOCUST CREEK |
Primary Dam Type |
Earth |
Surface Area |
4 |
Hydraulic Height |
24 |
Drainage Area |
100 |
Nid Storage |
106.6 |
Structural Height |
29 |
Outlet Gates |
Uncontrolled |
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.
Upper Locust Creek W-121