Lake Tobesofkee Dam Reservoir Report

Last Updated: December 5, 2025

Lake Tobesofkee Dam, also known as Fenley Ryther Dam, is a significant water resource structure located in Bibb, Georgia, within the Shiloh Church Environs.


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Summary

Constructed in 1965 by Dames & Moore, this earth-type dam stands 54 feet tall and spans 860 feet in length, serving primarily for flood risk reduction along Tobesofkee Creek. The dam's design features a buttress core and a controlled spillway with a Tainter gate system.

Managed by the local government and regulated by the GA-SAFE DAMS PROGRAM, Lake Tobesofkee Dam holds a storage capacity of 43,054 acre-feet and covers a surface area of 1,756 acres. With a drainage area of 115,520 acres, the dam plays a crucial role in mitigating flood hazards in the region. Despite its satisfactory condition assessment as of 2016, the dam's hazard potential is classified as high, emphasizing the need for regular inspections and risk management measures to ensure public safety and the dam's structural integrity.

Water resource and climate enthusiasts will appreciate Lake Tobesofkee Dam's vital role in flood risk reduction within the area, standing as a testament to engineering excellence and environmental stewardship. As one of the key structures in the region, this dam not only provides valuable water storage but also serves as a critical line of defense against potential flooding events. With its very high risk rating and historical significance, Lake Tobesofkee Dam stands as a beacon of resilience and proactive water management in the face of changing climate conditions.

Year Completed

1965

Dam Length

860

Dam Height

54

River Or Stream

TOBESOFKEE CREEK

Primary Dam Type

Earth

Surface Area

1756

Hydraulic Height

49

Drainage Area

115520

Nid Storage

43054

Outlet Gates

Tainter (radial)

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

54
       
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.