Big Creek-Hurricane Creek B- 20a Reservoir Report
Last Updated: December 19, 2025
Big Creek-Hurricane Creek B-20a is a local government-owned earth dam located in Carroll, Missouri, along the TR-Big Creek.
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Summary
Designed by the USDA NRCS and completed in 2005, this dam stands at a height of 27.3 feet and serves the primary purpose of flood risk reduction. With a maximum storage capacity of 65.2 acre-feet and a drainage area of 150.02 square miles, this structure plays a crucial role in managing water flow in the region.
Despite its low hazard potential and moderate risk assessment, Big Creek-Hurricane Creek B-20a has not been rated for its condition assessment. The dam features an uncontrolled spillway type with a width of 20 feet and outlet gates that are also uncontrolled. The structure has not been modified in recent years and does not have associated locks. With a surface area of 4.5 acres and a normal storage capacity of 18 acre-feet, this dam plays a vital role in mitigating flood risks and protecting the surrounding areas from potential water-related disasters.
Overall, Big Creek-Hurricane Creek B-20a is a significant asset in the water resource management system of Carroll, Missouri. With its strategic location and design for flood risk reduction, this earth dam contributes to the overall resilience of the region against potential water-related emergencies. Its moderate risk assessment underscores the importance of regular monitoring and maintenance to ensure its continued effectiveness in safeguarding the local community from flood hazards.
Year Completed |
2005 |
Dam Length |
625 |
Dam Height |
27.3 |
River Or Stream |
TR-BIG CREEK |
Primary Dam Type |
Earth |
Surface Area |
4.5 |
Hydraulic Height |
25 |
Drainage Area |
150.02 |
Nid Storage |
65.2 |
Structural Height |
32 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
32 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Wakenda Creek At Carrollton
|
8cfs |
Grand River Near Sumner
|
220cfs |
Shoal Creek Near Braymer Mo
|
12cfs |
Grand River At Chillicothe
|
361cfs |
Missouri River At Waverly
|
26800cfs |
Crooked River Near Richmond
|
4cfs |
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.
Big Creek-Hurricane Creek B- 20a