Holmes Long Bch Dam Reservoir Report

Last Updated: December 6, 2025

Holmes Long Bch Dam, also known as James A Derrick Dam, is a privately owned structure located in Aiken, South Carolina.


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Summary

Completed in 1978, this earth dam stands at a height of 24 feet and spans a length of 650 feet. With a primary purpose of irrigation, the dam has a storage capacity of 140 acre-feet, providing essential water resources for the surrounding area.

Maintained by the South Carolina Department of Health and Environmental Control, Holmes Long Bch Dam is regulated, inspected, and enforced to ensure its safety and functionality. Despite being classified as having a low hazard potential, the dam's condition is assessed as fair as of August 2017. It has a regular inspection frequency of every five years, with the last assessment taking place in August 2017.

Situated along the TR-LONG BRANCH river, Holmes Long Bch Dam plays a crucial role in water resource management in the region. With its strategic location and vital purpose of irrigation, this dam serves as a significant asset for the community and contributes to the sustainable utilization of water in South Carolina.

Year Completed

1978

Dam Length

650

Dam Height

24

River Or Stream

TR-LONG BRANCH

Primary Dam Type

Earth

Surface Area

12

Nid Storage

140

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

24
       
Seasonal Comparison

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Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.