Willow Creek Watershed Dam A- 24a Reservoir Report
Last Updated: December 15, 2025
Willow Creek Watershed Dam A-24a, located in Henrietta, Missouri, serves as a vital structure for grade stabilization along the TR-WILLOW CREEK stream.
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Summary
Built in 1970 by USDA NRCS, this earth dam stands at a height of 30 feet with a length of 625 feet, offering a storage capacity of 154 acre-feet and a drainage area of 95 square miles. Despite being uncontrolled, the spillway width of 40 feet ensures efficient water discharge during peak flow events.
With a low hazard potential and a moderate risk assessment rating, Willow Creek Watershed Dam A-24a plays a crucial role in managing water resources in Ray County, Missouri. Although not state-regulated, the dam's primary purpose of grade stabilization aligns with its design and construction by the Natural Resources Conservation Service. While the dam's condition remains unrated, its strategic location and design contribute to the overall risk management measures in place, ensuring the safety and stability of the surrounding community in the event of an emergency.
Year Completed |
1970 |
Dam Length |
625 |
Dam Height |
28 |
River Or Stream |
TR-WILLOW CREEK |
Primary Dam Type |
Earth |
Surface Area |
8 |
Hydraulic Height |
28 |
Drainage Area |
95 |
Nid Storage |
154 |
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.
Willow Creek Watershed Dam A- 24a