Sedalia Dam Reservoir Report

Last Updated: December 5, 2025

Sedalia Dam, located in Union, South Carolina, is a Federal-owned structure built in 1991 by the USDA Forest Service.


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Summary

This Earth-type dam stands at 26 feet in height and spans 500 feet in length, with a primary purpose of serving as a Fish and Wildlife Pond. The dam holds a maximum storage capacity of 121 acre-feet, with normal storage levels at 87 acre-feet.

Managing water resources for wildlife conservation and recreational purposes, Sedalia Dam plays a crucial role in maintaining the ecological balance of the area. With a low hazard potential and moderate risk assessment, the dam is monitored and inspected by the Forest Service every 10 years to ensure its safety and functionality. The dam's spillway is uncontrolled and measures 20 feet in width, with a maximum discharge capacity of 718 cubic feet per second.

Water enthusiasts and climate advocates can appreciate Sedalia Dam for its contributions to the local ecosystem and the opportunities it provides for outdoor recreation. This Federal-owned structure stands as a testament to the importance of sustainable water management and the preservation of natural habitats in South Carolina.

Year Completed

1991

Dam Length

500

Dam Height

26

River Or Stream

JOHNS CREEK

Primary Dam Type

Earth

Hydraulic Height

21

Drainage Area

1

Nid Storage

121

Outlet Gates

Uncontrolled

Hazard Potential

Low

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.