Ga Kaolin Impound #11a Upper Reservoir Report

Last Updated: December 5, 2025

Ga Kaolin Impound #11a Upper is a private water resource structure located in Twiggs, Georgia.


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Summary

This earth-type dam, designed by GA Kaolin, serves the primary purpose of tailings storage, with a storage capacity of 610 acre-feet and a normal storage level of 160 acre-feet. The dam stands at a height of 14.6 feet and has a length of 1450 feet, covering a surface area of 65 acres.

Despite being unlisted as a state-regulated structure, Ga Kaolin Impound #11a Upper is subject to periodic inspections, with the last one conducted in December 2020. The hazard potential is classified as low, with a moderate risk assessment score of 3. While the dam's condition is currently unrated, the structure is equipped with uncontrolled spillways and outlet gates. Overall, this impoundment provides essential storage for tailings material in the region, contributing to water resource management and environmental conservation efforts in Georgia.

Dam Length

1450

Dam Height

14.6

River Or Stream

UNKNOWN

Primary Dam Type

Earth

Surface Area

65

Nid Storage

610

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

15
       
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.