Callahan Creek Watershed A-4 Reservoir Report
Last Updated: December 18, 2025
Callahan Creek Watershed A-4, located in Boone County, Missouri, is a local government-owned earth dam designed by the USDA NRCS for flood risk reduction along the TR-Callahan Creek.
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Summary
Completed in 1975, this dam stands at 27 feet high with a length of 570 feet, providing a storage capacity of 300 acre-feet and a drainage area of 243.2 square miles. Despite its low hazard potential, the dam's condition remains unrated, with no recent inspection data available.
With a maximum discharge rate of 630 cubic feet per second and a spillway width of 50 feet, this dam serves a critical role in managing flood risks within the watershed. While the dam is currently not regulated or inspected by the state, its moderate risk assessment suggests the need for continued monitoring and potential risk management measures in the future. Although there are no associated structures or outlet gates, the dam's presence is essential for protecting the surrounding area from potential inundation during extreme weather events.
For water resource and climate enthusiasts, Callahan Creek Watershed A-4 offers a fascinating case study in local flood risk reduction efforts. With its unique design features and historical significance, this dam showcases the importance of proactive infrastructure development in mitigating the impacts of severe weather on communities and natural resources. As the watershed continues to face changing environmental challenges, monitoring and maintaining this vital earth dam will be crucial for ensuring the safety and resilience of the surrounding area in the years to come.
Year Completed |
1975 |
Dam Length |
570 |
Dam Height |
27 |
River Or Stream |
TR-CALLAHAN CREEK |
Primary Dam Type |
Earth |
Surface Area |
6 |
Hydraulic Height |
27 |
Drainage Area |
243.2 |
Nid Storage |
300 |
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.
Callahan Creek Watershed A-4