Upper Locust Creek W-120 Reservoir Report
Last Updated: December 12, 2025
Upper Locust Creek W-120 is a flood risk reduction structure located in Sullivan County, Missouri.
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Summary
Constructed in 2004 by the USDA NRCS, this earth dam stands at a height of 27 feet and has a storage capacity of 163.5 acre-feet. The primary purpose of this dam is flood risk reduction, serving as a crucial infrastructure to protect the surrounding area from potential water overflow during heavy rainfall events.
This dam on TR-LOCUST CREEK has a low hazard potential and is classified as having a moderate risk level. Despite not being currently rated for condition assessment, Upper Locust Creek W-120 continues to play a vital role in managing water resources in the region. With a normal storage capacity of 49.5 acre-feet and a maximum discharge of 197.7 cubic feet per second, this structure serves multiple purposes including fire protection, stock or small fish pond, and fish and wildlife habitat enhancement.
In the event of emergencies, the dam has an uncontrolled spillway and outlet gates. While not currently regulated or inspected by state agencies, Upper Locust Creek W-120 exemplifies the importance of local government initiatives in water resource management and climate resilience efforts.
Year Completed |
2004 |
Dam Length |
580 |
Dam Height |
27 |
River Or Stream |
TR-LOCUST CREEK |
Primary Dam Type |
Earth |
Surface Area |
6 |
Hydraulic Height |
27 |
Drainage Area |
120 |
Nid Storage |
163.5 |
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-120