Thomas Harper Dam Reservoir Report
Last Updated: December 5, 2025
Thomas Harper Dam, located in Hampton, South Carolina, was completed in 1930 and stands at a height of 14 feet with a length of 600 feet.
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Summary
This earth dam, primarily used for recreation, spans the Calico Branch and provides a storage capacity of 236 acre-feet. Despite its low hazard potential and fair condition assessment, the dam is regulated by the South Carolina Department of Health and Environmental Control (DHEC) and undergoes regular inspections, with the last assessment conducted in November 2017.
Owned privately, Thomas Harper Dam serves as a popular recreational spot with a surface area of 40 acres, offering opportunities for fishing, boating, and other water activities. The dam's stone core and soil foundation contribute to its structural integrity, while its location within the Charleston District further enhances its appeal to water resource and climate enthusiasts. With a history dating back over 90 years, this dam continues to be a significant landmark in the region, attracting visitors and locals alike to its picturesque surroundings and serene waters.
While lacking features such as spillways and locks, Thomas Harper Dam remains a reliable and vital structure for water management in the area. Its modest storage capacity and efficient design reflect a balance between functionality and recreational use, showcasing the importance of sustainable water resource management in preserving natural ecosystems and supporting community well-being. As efforts to maintain and improve dam infrastructure continue, Thomas Harper Dam stands as a testament to the resilience and importance of water resources in shaping local landscapes and lifestyles.
Year Completed |
1930 |
Dam Length |
600 |
Dam Height |
14 |
River Or Stream |
CALICO BRANCH |
Primary Dam Type |
Earth |
Surface Area |
40 |
Nid Storage |
236 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
14 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Coosawhatchie River Near Hampton
|
68cfs |
Savannah R At Burtons Ferry Br Nr Millhaven
|
7320cfs |
Savannah River Near Clyo
|
6820cfs |
Brier Creek At Millhaven
|
458cfs |
Salkehatchie River Near Miley
|
242cfs |
Ebenezer Creek At Springfield
|
12cfs |
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.
Thomas Harper Dam