Black Watershed Structure Y-36-40 Dam Reservoir Report
Last Updated: December 6, 2025
Black Watershed Structure Y-36-40 Dam, also known as Brothers Dam, is a vital local government-owned structure situated in Holmes, Mississippi, specifically in the city of Coxburg.
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Summary
Built in 1965 by the USDA NRCS, this earth-type dam stands at 30 feet high and serves the primary purpose of flood risk reduction along the Harland Creek. With a maximum storage capacity of 606 acre-feet, this dam plays a crucial role in managing water resources in the region.
Although classified as having a low hazard potential, the Black Watershed Structure Y-36-40 Dam is regulated by the Mississippi Department of Environmental Quality and undergoes regular state inspection and enforcement to ensure its functionality and safety. The dam features an uncontrolled spillway and outlet gates, with a moderate risk assessment rating. Despite not being rated for its condition assessment, the dam continues to play a significant role in flood risk reduction and water resource management in the area.
As a key component of the local water infrastructure, the Black Watershed Structure Y-36-40 Dam contributes to the overall resilience of the region against flooding events. With its design by the USDA NRCS and state regulation, this dam stands as a testament to the collaborative efforts between federal and state agencies in ensuring the safety and effectiveness of water resource management structures. For water resource and climate enthusiasts, the Black Watershed Structure Y-36-40 Dam represents a critical piece of infrastructure that protects the community and environment from the impacts of extreme weather events.
Year Completed |
1965 |
Dam Height |
30 |
River Or Stream |
HARLAND CREEK |
Primary Dam Type |
Earth |
Drainage Area |
1.72 |
Nid Storage |
606 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Harland Creek Nr Howard
|
3340cfs |
Abiaca Creek At Cruger
|
44cfs |
Big Black River At West
|
190cfs |
Big Black River Nr Bentonia
|
502cfs |
Yockanookany River Nr Kosciusko
|
54cfs |
Yockanookany River Nr Ofahoma
|
96cfs |
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.
Black Watershed Structure Y-36-40 Dam