Jlwannamaker Dam 2 Reservoir Report
Nearby: Jlwannamaker Dam 1 Bensons Pond Dam
Last Updated: December 26, 2025
Jlwannamaker Dam 2, located in Calhoun, South Carolina, is a privately owned earth dam primarily built for recreational purposes.
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Summary
Standing at a height of 30 feet and stretching 650 feet in length, this dam was completed in 1930 and has a storage capacity of 75 acre-feet. Despite being classified as having low hazard potential, the dam is currently assessed to be in poor condition as of the last inspection in March 2017.
Managed by the South Carolina Department of Health and Environmental Control (SC DHEC), Jlwannamaker Dam 2 overlooks the TR-Speigner Branch, providing a picturesque setting for water and climate enthusiasts to explore. Although the risk assessment categorizes the dam's risk level as moderate, it is important for stakeholders to consider potential safety measures and future maintenance to ensure the structural integrity of the dam. With a history dating back to the early 20th century, this dam serves as a testament to the intersection of human ingenuity and natural resource management in the region.
As climate change continues to impact water resources and infrastructure, the maintenance and monitoring of dams like Jlwannamaker Dam 2 become increasingly crucial. By staying informed about the dam's condition, regulatory oversight, and emergency preparedness plans, enthusiasts can contribute to the preservation and sustainable utilization of this important water resource. With its rich history and potential for recreational activities, Jlwannamaker Dam 2 represents a unique opportunity to appreciate the beauty and significance of water infrastructure in the context of climate resilience.
Year Completed |
1930 |
Dam Length |
650 |
Dam Height |
30 |
River Or Stream |
TR-SPEIGNER BRANCH |
Primary Dam Type |
Earth |
Surface Area |
5 |
Nid Storage |
75 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Wateree R. Bl Eastover
|
2400cfs |
North Fork Edisto River At Orangeburg
|
635cfs |
Gills Creek At Columbia
|
42cfs |
Congaree River At Columbia
|
3750cfs |
Smith Branch At North Main St At Columbia
|
4cfs |
Saluda River Near Columbia
|
882cfs |
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.
Jlwannamaker Dam 2