Cox Dam Reservoir Report
Nearby: Bell Dam H&W Llc Dam
Last Updated: December 6, 2025
Cox Dam, nestled in Henry, Virginia, is a privately owned earth dam with a height of 30 feet and a length of 410 feet.
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Summary
This structure serves a critical role in water resource management, providing a storage capacity of 22 acre-feet and a normal storage of 17 acre-feet. The dam's primary purpose and associated structures are not specified, but its state-regulated status, inspection frequency of 1, and undetermined hazard potential indicate a commitment to safety and compliance.
Managed by the Department of Conservation and Recreation in Virginia, Cox Dam's condition assessment is currently marked as "Not Rated", with no specific data on its completion year or modifications. Despite lacking certain details such as spillway type and discharge capacity, the dam's strategic location and storage capabilities make it a valuable asset for water management in the region. With its private ownership and state jurisdiction, Cox Dam stands as a testament to collaborative efforts in safeguarding water resources and adapting to changing climate conditions in the area.
While Cox Dam's risk assessment and emergency preparedness status are not specified, its presence under the Wilmington District of the US Army Corps of Engineers underscores its importance in the local water infrastructure. As a part of Congressman H. Morgan Griffith's constituency, the dam plays a vital role in flood control and water supply management. With a surface area of 1.66 acres and a latitude of 36.6233, Cox Dam serves as a key player in the sustainable utilization of water resources and climate resilience efforts in Virginia.
Dam Length |
410 |
Dam Height |
30 |
Primary Dam Type |
Earth |
Surface Area |
1.66 |
Hydraulic Height |
30 |
Nid Storage |
22 |
Structural Height |
30 |
Hazard Potential |
Undetermined |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Smith River At Martinsville
|
149cfs |
North Mayo River Near Spencer
|
61cfs |
Mayo River Near Price
|
132cfs |
Smith River At Eden
|
222cfs |
Smith River At Bassett
|
101cfs |
Smith River Near Philpott
|
76cfs |
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.
Cox Dam