Lake Thomaston Dam Reservoir Report
Last Updated: February 22, 2026
Lake Thomaston Dam, located in Upson, Georgia, was completed in 1954 and serves as a vital water supply source for the region.
Summary
Managed by the local government, this earth dam stands at a height of 52.7 feet and has a storage capacity of 2000 acre-feet, with a normal storage level of 1600 acre-feet. The dam spans a length of 1400 feet and covers a surface area of 73 acres, providing essential water resources for the surrounding community.
With a high hazard potential but a satisfactory condition assessment, Lake Thomaston Dam is regulated and inspected by the Georgia Safe Dams Program. Despite its uncontrolled spillway and outlet gates, the dam's risk assessment indicates a moderate level of risk. The dam is designed to withstand potential emergencies, although specific emergency action plans and risk management measures are not outlined in the available data. As a key infrastructure for water supply purposes, Lake Thomaston Dam plays a crucial role in maintaining water security and resilience in the region, highlighting the importance of sustainable water resource management in the face of climate variability and change.
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Humidity
15-Day Weather Outlook
Year Completed |
1954 |
Dam Length |
1400 |
Dam Height |
52.7 |
River Or Stream |
Unknown |
Primary Dam Type |
Earth |
Surface Area |
73 |
Hydraulic Height |
50 |
Drainage Area |
160 |
Nid Storage |
2000 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
High |
Foundations |
Rock, Soil |
Nid Height |
53 |
Seasonal Comparison
5-Day Hourly Forecast Detail
Nearby Streamflow Levels
Flint River Near Culloden
|
1290cfs |
Flint River Near Griffin
|
176cfs |
Shoal Creek At Shoal Creek Rd
|
11cfs |
Line Creek Near Senoia
|
90cfs |
Tobesofkee Creek Near Macon
|
9cfs |
Flint River Near Lovejoy
|
85cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Lake Thomaston Dam