Yonce Pond Dam Reservoir Report

Last Updated: December 5, 2025

Yonce Pond Dam, also known as Miller Pond Dam, is a local government-owned structure located in Edgefield, South Carolina.


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Summary

Built in 1978 by the USDA NRCS, this earth dam stands at a height of 26 feet and stretches 315 feet in length. Its primary purpose is for recreation, with a storage capacity of 61 acre-feet and a surface area of 5 acres.

Despite its low hazard potential, Yonce Pond Dam is currently in poor condition, as noted during its last inspection in August 2017. The dam is classified as having a moderate risk level, with a risk assessment score of 3. While the dam is state-regulated and monitored by the SC DHEC, its associated structures and drainage area information are not listed.

For water resource and climate enthusiasts interested in the management and maintenance of dams, Yonce Pond Dam serves as an intriguing case study on the importance of regular inspections and risk assessments to ensure the safety and functionality of such structures. With its scenic location and recreational opportunities, this dam highlights the balance between human enjoyment and the need for careful stewardship of our water resources in the face of changing climate conditions.

Year Completed

1978

Dam Length

315

Dam Height

26

River Or Stream

TR-HORSE CREEK

Primary Dam Type

Earth

Surface Area

5

Nid Storage

61

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

26
       
Seasonal Comparison

Weather Forecast

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.