South River Dam #10a Reservoir Report

Last Updated: December 5, 2025

South River Dam #10a, also known as Mills Creek, is a key structure in Augusta, Virginia, owned by the local government and regulated by the Department of Conservation and Recreation.


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Summary

This dam primarily serves the purpose of flood risk reduction and water supply, standing at a height of 97.5 feet and with a storage capacity of 1235 acre-feet. The dam, constructed with earth materials, spans a length of 715 feet and covers a surface area of 17.4 acres, with a drainage area of 3.7 square miles.

Located in a picturesque setting along Mills Creek, South River Dam #10a plays a crucial role in managing water resources and protecting the surrounding communities from potential flooding risks. The dam's condition is assessed as satisfactory, with the last inspection carried out in September 2017. Despite its high hazard potential, the dam meets regulatory standards and undergoes regular inspections, ensuring its structural integrity and functionality in mitigating flood risks effectively. With its strategic position and essential role in flood risk reduction, South River Dam #10a stands as a vital asset for water resource management in the region.

Dam Length

715

Dam Height

97.5

River Or Stream

MILLS CREEK

Primary Dam Type

Earth

Surface Area

17.4

Hydraulic Height

97.5

Drainage Area

3.7

Nid Storage

1235

Structural Height

97.5

Hazard Potential

High

Nid Height

98
       
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.