Billy Cox Lower Pond Dam Reservoir Report
Last Updated: December 15, 2025
Billy Cox Lower Pond Dam, also known as W H Cox Dam 1, is a privately owned earth dam located in Williamsburg, South Carolina.
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Summary
Built in 1965 with a height of 10 feet and a length of 250 feet, the dam serves primarily for recreational purposes and has a storage capacity of 58 acre-feet. The dam is situated on TR-JUNE BRANCH and is regulated by the South Carolina Department of Health and Environmental Control (SC DHEC).
Despite its low hazard potential, the dam's condition assessment was rated as poor during the last inspection in November 2017. The inspection frequency is every 5 years, and the dam lacks an Emergency Action Plan (EAP) and updated inundation maps. While the dam presents a moderate risk due to its condition, the lack of risk assessment and management measures raises concerns for potential safety issues in the future. As water resource and climate enthusiasts, it is important to monitor the maintenance and safety measures of dams like Billy Cox Lower Pond Dam to ensure the protection of surrounding communities and the environment.
Year Completed |
1965 |
Dam Length |
250 |
Dam Height |
10 |
River Or Stream |
TR-JUNE BRANCH |
Primary Dam Type |
Earth |
Surface Area |
8 |
Nid Storage |
58 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
10 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Santee River Nr Jamestown
|
1170cfs |
Black River At Kingstree
|
1280cfs |
Lake Moultrie Tailrace Canal At Moncks Corner
|
9370cfs |
Santee River Near Pineville
|
676cfs |
Turkey Creek Near Maryville
|
2cfs |
Back River At Dupont Intake Nr Kittredge
|
311cfs |
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.
Billy Cox Lower Pond Dam
Headwaters To Highway 402