Upper Little Black Watershed Dam D- 9 Reservoir Report
Last Updated: December 5, 2025
The Upper Little Black Watershed Dam D-9, also known as the Upper Little Black Site D-9 Dam, was completed in 1985 and is located in Naylor, Missouri.
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Summary
This earth dam, designed by the USDA NRCS, serves the primary purpose of flood risk reduction along the TR-Little Black River. With a height of 33 feet and a length of 570 feet, the dam has a storage capacity of 313 acre-feet and covers a surface area of 4 acres.
Although the dam is classified as low hazard potential with a moderate risk assessment, it has not been rated for its condition assessment. It is not currently regulated by the state and does not have a state inspection or enforcement plan in place. The dam features an uncontrolled spillway with a width of 30 feet and does not have any outlet gates. Despite the lack of recent inspection data, the dam continues to play a crucial role in protecting the surrounding area from potential flooding events. For water resource and climate enthusiasts, the Upper Little Black Watershed Dam D-9 is a fascinating structure that showcases the importance of flood risk reduction measures in vulnerable regions like Butler County, Missouri.
Year Completed |
1985 |
Dam Length |
570 |
Dam Height |
33 |
River Or Stream |
TR-LITTLE BLACK RIVER |
Primary Dam Type |
Earth |
Surface Area |
4 |
Hydraulic Height |
33 |
Drainage Area |
220 |
Nid Storage |
313 |
Structural Height |
33 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
33 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Black River Below Fairdealing
|
113cfs |
Black River At Poplar Bluff
|
858cfs |
Current River At Doniphan
|
1900cfs |
Black River Near Corning
|
789cfs |
St. Francis River At Wappapello
|
695cfs |
Black River At Leeper
|
508cfs |
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.
Upper Little Black Watershed Dam D- 9