Upper Locust Creek W-170a Reservoir Report
Nearby: Charles Emberton Dam Cook Dam
Last Updated: December 20, 2025
Upper Locust Creek W-170a is a flood risk reduction structure located in Sullivan, Missouri.
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Summary
Built in 2010 by the USDA NRCS, this earth dam stands at a height of 25.2 feet and has a capacity of 113 acre-feet. It serves the primary purpose of flood risk reduction along the TR-BRUSHY BRANCH river.
With a low hazard potential and a moderate risk assessment rating, Upper Locust Creek W-170a is designed to mitigate the impact of flooding in the area. The dam has a maximum discharge capacity of 206.1 cubic feet per second and a normal storage capacity of 31.5 acre-feet. Despite its critical role in protecting the local community from floods, the structure has not been rated for its condition.
Although not regulated or inspected by the state, Upper Locust Creek W-170a remains a vital asset in managing water resources and climate-related risks in the region. With its strategic location and design, this dam exemplifies the importance of proactive flood risk reduction measures in safeguarding communities and ecosystems against the impacts of extreme weather events.
Year Completed |
2010 |
Dam Length |
480 |
Dam Height |
25.2 |
River Or Stream |
TR-BRUSHY BRANCH |
Primary Dam Type |
Earth |
Surface Area |
7 |
Hydraulic Height |
25 |
Drainage Area |
90 |
Nid Storage |
113 |
Structural Height |
31 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
31 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Medicine Creek Near Laredo
|
6cfs |
Locust Creek Near Linneus
|
35cfs |
Thompson River At Trenton
|
111cfs |
Chariton River At Novinger
|
48cfs |
Grand River At Chillicothe
|
361cfs |
Grand River Near Sumner
|
220cfs |
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-170a