Middle Oconee- Walnut Creek Structure No 7 Reservoir Report

Last Updated: December 5, 2025

Middle Oconee- Walnut Creek Structure No 7, located in Hall, Georgia, is a state-owned earth dam designed by the Natural Resources Conservation Service with a primary purpose of flood risk reduction.


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Summary

Completed in 1972, this structure stands at a height of 47 feet and spans 266 feet in length, providing a storage capacity of 1139 acre-feet on the Allen Creek. Despite its low hazard potential, the dam has not been rated for its condition, with the last inspection conducted in October 2009.

With no state regulatory agency overseeing its operations, Middle Oconee- Walnut Creek Structure No 7 remains under state jurisdiction and is subject to periodic inspections. The dam features an uncontrolled spillway and outlet gates, with a moderate risk assessment rating of 3. Although no emergency action plan has been prepared or updated for this structure, it serves as an important component in managing flood risks and protecting the Gainesville community from potential inundation events. As water resource and climate enthusiasts, understanding the infrastructure and risk factors associated with dams like Structure No 7 is crucial for ensuring the safety and sustainability of our water systems.

Year Completed

1972

Dam Length

266

Dam Height

47

River Or Stream

ALLEN CREEK

Primary Dam Type

Earth

Surface Area

24

Drainage Area

2573

Nid Storage

1139

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

47
       
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.