W S Mccollough Pond Dam Reservoir Report
Last Updated: December 15, 2025
W S Mccollough Pond Dam, located in Williamsburg, South Carolina, is a private-owned structure built in 1951 for recreational purposes.
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Summary
Standing at a height of 11 feet and stretching 1600 feet in length, this earth dam holds a storage capacity of 64 acre-feet with a surface area of 10 acres. The dam, situated on the TR-THORNTREE SWAMP river, is regulated by the South Carolina Department of Health and Environmental Control (SC DHEC) and undergoes regular inspections to ensure its safety and compliance with state regulations.
Despite being classified as having a low hazard potential, the dam's condition assessment has been rated as poor, as of November 2017. With a moderate risk level of 3, there are no emergency action plans in place, and the dam's risk management measures are unspecified. However, the dam remains a popular spot for recreational activities, attracting water resource and climate enthusiasts to its picturesque surroundings. As efforts continue to maintain and improve the dam's condition, it serves as a reminder of the importance of proper infrastructure management in safeguarding our water resources and natural environment.
Year Completed |
1951 |
Dam Length |
1600 |
Dam Height |
11 |
River Or Stream |
TR-THORNTREE SWAMP |
Primary Dam Type |
Earth |
Surface Area |
10 |
Nid Storage |
64 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
11 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Black River At Kingstree
|
1280cfs |
Santee River Near Pineville
|
676cfs |
Santee River Nr Jamestown
|
1170cfs |
Lake Moultrie Tailrace Canal At Moncks Corner
|
9370cfs |
Lynches River At Effingham
|
558cfs |
Turkey Creek Near Maryville
|
2cfs |
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.
W S Mccollough Pond Dam