Upper Locust Creek W-165 Reservoir Report
Nearby: Upper Locust Creek W-164a Cook Dam
Last Updated: December 20, 2025
Upper Locust Creek W-165, also known as Site W-165, is a flood risk reduction structure located in Milan, Missouri.
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Summary
Managed by the USDA NRCS, this earth dam stands at a height of 32.2 feet and was completed in 2010. It serves the primary purpose of flood risk reduction along the TR-West Locust Creek, with a storage capacity of 78.4 acre-feet and a drainage area of 191 square miles.
With a low hazard potential and a moderate risk assessment rating, Upper Locust Creek W-165 plays a crucial role in mitigating potential flooding events in the region. This uncontrolled spillway structure has a structural height of 36 feet and a surface area of 8 acres. Despite not being regulated or inspected by state agencies, the dam remains a vital asset for the local government in managing water resources and climate-related risks in the area.
While not currently rated for condition assessment, Upper Locust Creek W-165 continues to stand as a reliable flood risk reduction measure in Sullivan County, Missouri. With no outlet gates and a stone core foundation, this structure exemplifies the importance of effective water resource management and infrastructure in safeguarding communities against the impacts of extreme weather events.
Year Completed |
2010 |
Dam Length |
410 |
Dam Height |
32.2 |
River Or Stream |
TR-WEST LOCUST CREEK |
Primary Dam Type |
Earth |
Surface Area |
8 |
Hydraulic Height |
32 |
Drainage Area |
191 |
Nid Storage |
78.4 |
Structural Height |
36 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
36 |
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 |
Chariton River At Livonia
|
45cfs |
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-165