Johnsonville Club Dam Reservoir Report
Last Updated: December 14, 2025
Johnsonville Club Dam, also known as Wellman Country Club Dam, is a privately owned structure located in Florence, South Carolina.
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Summary
Completed in 1960, this earth dam stands at a height of 10 feet and stretches 635 feet in length along the TR-LYNCHES RIVER. With a primary purpose of recreation, the dam offers a storage capacity of 69 acre-feet and covers a surface area of 8 acres.
Despite its low hazard potential, the dam's condition assessment is rated as poor, with the last inspection conducted in November 2017. The South Carolina Department of Health and Environmental Control (SC DHEC) regulates the dam, ensuring that state permitting, inspection, and enforcement are in place. With a designated emergency action plan, the dam is equipped to handle any potential risks and emergencies that may arise in the future. For water resource and climate enthusiasts, Johnsonville Club Dam presents an interesting case study in private dam ownership and management within the state.
Year Completed |
1960 |
Dam Length |
635 |
Dam Height |
10 |
River Or Stream |
TR-LYNCHES RIVER |
Primary Dam Type |
Earth |
Surface Area |
8 |
Nid Storage |
69 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
10 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Pee Dee R. At Galivants Ferry
|
2320cfs |
Pee Dee River At Hwy 701 Nr Bucksport
|
8500cfs |
Waccamaw River At Conway Marina At Conway
|
2260cfs |
Pee Dee River Below Pee Dee
|
2840cfs |
Lynches River At Effingham
|
558cfs |
Black River At Kingstree
|
1280cfs |
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.
Johnsonville Club Dam