D.O.E. Savannah River Pond C Reservoir Report

Last Updated: December 6, 2025

D.O.E.


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Summary

Savannah River Pond C, also known as 685-24g, is a federal-owned dam located in Barnwell, South Carolina. Constructed in 1957 by the Department of Energy, this earth dam stands at a height of 46.6 feet and has a hydraulic height of 81.8 feet. With a storage capacity of 4867 acre-feet and a surface area of 160 acres, this dam plays a crucial role in managing water resources in the region.

The primary purpose of D.O.E. Savannah River Pond C is categorized as 'Other', with a low hazard potential. Despite being non-regulated by the state, the dam has undergone regular inspections, with the last one conducted in 2004. It is equipped with outlet gates for water release and emergency preparedness measures are being evaluated. The dam is situated on the Lower Three Runs-TR river or stream, and it is vital for flood control and water supply management in the area.

Managed by the Department of Energy, D.O.E. Savannah River Pond C serves as a key infrastructure for water resource management in South Carolina. With its significant storage capacity and strategic location, this dam plays a crucial role in ensuring water security and environmental sustainability in the region. For water resource and climate enthusiasts, this dam represents a fascinating intersection of engineering, environmental stewardship, and regulatory oversight in safeguarding our water resources for future generations.

Year Completed

1957

Dam Length

1303

Dam Height

46.6

River Or Stream

LOWER THREE RUNS-TR

Primary Dam Type

Earth

Surface Area

160

Hydraulic Height

81.8

Drainage Area

8

Nid Storage

4867

Structural Height

46.6

Outlet Gates

None, Valve - 1

Hazard Potential

Low

Foundations

Rock

Nid Height

82
       
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.