Willow Creek Watershed Dam A- 30 Reservoir Report
Last Updated: December 14, 2025
Located in the picturesque Willow Creek Watershed in Henrietta, Missouri, Dam A-30 stands as a testament to the importance of grade stabilization in water resource management.
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Summary
Built in 1972 by the USDA NRCS, this earth dam with a stone core rises 27 feet above the ground and stretches 500 feet in length, providing vital grade stabilization for the surrounding area. With a capacity to store 108 acre-feet of water and a drainage area of 186 acres, the dam plays a crucial role in controlling the flow of the TR-WILLOW CREEK.
Despite its low hazard potential and moderate risk assessment, Dam A-30 has not been rated for its condition as of yet. However, its primary purpose of grade stabilization and its uncontrolled spillway with a width of 30 feet ensure that it effectively manages water flow and protects the downstream areas. With no state regulation or inspection required, the dam serves as a valuable asset in the Willow Creek Watershed, demonstrating the importance of sustainable water resource management practices in the region.
As water resource and climate enthusiasts continue to monitor and assess the condition of Dam A-30, its role in grade stabilization and water flow management remains paramount. With its strategic location and design, the dam stands as a testament to the collaborative efforts of local government agencies and the USDA NRCS in ensuring the sustainability and resilience of water resources in the Henrietta area. As the community continues to prioritize water conservation and management, Dam A-30 serves as a vital component in maintaining the ecological balance of the Willow Creek Watershed.
Year Completed |
1972 |
Dam Length |
500 |
Dam Height |
25 |
River Or Stream |
TR-WILLOW CREEK |
Primary Dam Type |
Earth |
Surface Area |
8 |
Hydraulic Height |
25 |
Drainage Area |
186 |
Nid Storage |
108 |
Structural Height |
27 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
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- 30