Willow Creek Watershed Dam C- 1 Reservoir Report
Last Updated: December 16, 2025
Willow Creek Watershed Dam C-1, also known as Ray County Dam No.C-1, is a vital structure designed by the USDA NRCS to mitigate flood risks in the Henrietta area of Missouri.
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Summary
Completed in 1972, this earth dam stands at a height of 25 feet and has a storage capacity of 370 acre-feet, serving a drainage area of 420 acres along TR-WILLOW CREEK. With a spillway width of 60 feet, the dam is equipped to handle a maximum discharge of 1800 cubic feet per second.
Despite being classified as having a significant hazard potential, the condition of Willow Creek Watershed Dam C-1 is currently not rated, as its last inspection dates back to 1979. The dam's emergency action plan status, risk assessment, and other safety measures have not been updated in recent years. However, with a moderate risk rating of 3, there is a pressing need for further evaluation and potential upgrades to ensure the continued safety and functionality of this important flood control structure in Ray County, Missouri.
Enthusiasts of water resources and climate management will find Willow Creek Watershed Dam C-1 to be a fascinating case study in flood risk reduction infrastructure. As a locally owned and operated dam, its role in protecting the surrounding community from potential inundation events highlights the ongoing challenges and responsibilities associated with managing water resources in a changing climate. With the cooperation of federal and state agencies, along with continued monitoring and maintenance efforts, this dam can continue to serve its important purpose for years to come.
Year Completed |
1972 |
Dam Length |
650 |
Dam Height |
25 |
River Or Stream |
TR-WILLOW CREEK |
Primary Dam Type |
Earth |
Surface Area |
10 |
Hydraulic Height |
25 |
Drainage Area |
420 |
Nid Storage |
370 |
Structural Height |
27 |
Outlet Gates |
None |
Hazard Potential |
Significant |
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 C- 1