Yonce Dam Reservoir Report
Nearby: Bush Pond Dam Sandhill Group Dam
Last Updated: December 6, 2025
Yonce Dam, located in Edgefield, South Carolina, has been serving as a vital water resource for the region since its completion in 1910.
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Summary
Owned and operated by a private entity, this earth dam stands at a height of 26 feet and stretches 600 feet in length, creating a reservoir with a storage capacity of 200 acre-feet. While primarily designed for recreation purposes, the dam also plays a crucial role in regulating water flow along Beech Creek.
Despite its historical significance and recreational value, Yonce Dam currently faces some challenges in terms of its condition assessment, with a poor rating noted during the last inspection in February 2019. Classified as having a significant hazard potential, the dam requires regular monitoring and maintenance to ensure the safety of nearby residents and the surrounding environment. With state regulation and enforcement in place, efforts are being made to address the dam's condition and enhance its resilience to potential risks.
As water resource and climate enthusiasts continue to follow developments related to Yonce Dam, the focus remains on implementing necessary risk management measures and ensuring that emergency action plans are up to date. With its strategic location and historical relevance, Yonce Dam serves as a reminder of the importance of maintaining and safeguarding critical infrastructure for the benefit of both present and future generations.
Year Completed |
1910 |
Dam Length |
600 |
Dam Height |
26 |
River Or Stream |
BEECH CREEK |
Primary Dam Type |
Earth |
Surface Area |
63 |
Nid Storage |
200 |
Hazard Potential |
Significant |
Foundations |
Rock, Soil |
Nid Height |
26 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Mctier Creek (Rd 209) Near Monetta
|
20cfs |
Bush River Nr Prosperity
|
58cfs |
Saluda River At Chappells
|
1220cfs |
Lake Greenwood Tailrace Nr Chappells
|
1090cfs |
Little River Nr Silverstreet
|
94cfs |
Augusta Canal Nr Augusta (Upper)
|
2080cfs |
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.
Yonce Dam