Willow Creek Watershed Dam A- 22 Reservoir Report
Last Updated: December 15, 2025
Located in the heart of Missouri, the Willow Creek Watershed Dam A- 22 is a vital structure designed by USDA NRCS to serve the primary purpose of grade stabilization.
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Summary
Built in 1970, this earth dam stands at a height of 33 feet and has a structural height of 35 feet, with a length of 885 feet. With a storage capacity of 312 acre-feet and a drainage area of 650 acres, this dam plays a crucial role in managing water resources in the region.
With a low hazard potential and a moderate risk assessment rating, the Willow Creek Watershed Dam A- 22 ensures the safety of the surrounding communities in Henrietta, Missouri. The dam features an uncontrolled spillway with a width of 60 feet, providing effective flood control measures for the area. Despite being not rated for its condition assessment, the dam continues to serve its intended purpose of grade stabilization, contributing to the overall water resource management efforts in the region.
As part of the Rock Island District, this dam is a testament to the collaboration between local government and federal agencies in ensuring the resilience of water infrastructure in the face of changing climate patterns. With a focus on sustainability and risk management, the Willow Creek Watershed Dam A- 22 stands as a symbol of effective water resource management and climate adaptation strategies in Missouri's Ray County.
Year Completed |
1970 |
Dam Length |
885 |
Dam Height |
33 |
River Or Stream |
TR-WILLOW CREEK |
Primary Dam Type |
Earth |
Surface Area |
18 |
Hydraulic Height |
33 |
Drainage Area |
650 |
Nid Storage |
312 |
Structural Height |
35 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
35 |
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- 22