William Jeffords Dam Reservoir Report

Last Updated: December 5, 2025

William Jeffords Dam, located in Spartanburg, South Carolina, serves as a crucial water resource for fire protection and maintaining a small fish pond, with a storage capacity of 90 acre-feet.


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Summary

Completed in 1998, this earth dam stands at 22 feet high and spans a length of 460 feet along the TR-South Tyger River. Despite its low hazard potential, the dam's condition assessment in 2017 reported poor structural integrity, prompting concern for its long-term safety and maintenance.

Managed by a private owner and regulated by the South Carolina Department of Health and Environmental Control, William Jeffords Dam has been inspected every five years to ensure compliance with state jurisdiction and permitting requirements. The dam's spillway type is categorized as uncontrolled, emphasizing the need for ongoing monitoring and risk assessment to mitigate potential hazards. The dam's risk level is rated as moderate, highlighting the importance of implementing robust risk management measures to address its structural deficiencies and safeguard the surrounding community from any potential emergencies.

Year Completed

1998

Dam Length

460

Dam Height

22

River Or Stream

TR-SOUTH TYGER RIVER

Primary Dam Type

Earth

Surface Area

8

Nid Storage

90

Hazard Potential

Low

Foundations

Soil

Nid Height

22
       
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.