Lower Thornhill Irrigation Pond Dam Reservoir Report
Last Updated: December 5, 2025
The Lower Thornhill Irrigation Pond Dam in Tift, Georgia, stands as a significant private structure with a low hazard potential.
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Summary
Constructed as an earth dam with a buttress core, it reaches a height of 19.6 feet and stores up to 457.1 acre-feet of water for irrigation purposes. Despite being uncontrolled, the dam's spillway type ensures safe water release in case of overflow, while its overall condition remains unrated.
Located within the Jacksonville District of the US Army Corps of Engineers, the dam has not been inspected since May 2000, with a scheduled inspection frequency of 5 years. Despite a moderate risk assessment rating, the dam's emergency action plan status, risk management measures, and inundation maps remain unprepared or updated. With a primary purpose centered around irrigation storage, the Lower Thornhill Irrigation Pond Dam serves as a critical infrastructure within the region, highlighting the importance of proper maintenance and regulatory oversight for water resource enthusiasts and climate advocates to ensure its long-term safety and functionality.
Dam Length |
1135 |
Dam Height |
19.6 |
Primary Dam Type |
Earth |
Surface Area |
38 |
Nid Storage |
457.1 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little R At Tifton Worth Co Line Rd
|
0cfs |
Alapaha River Near Alapaha
|
12cfs |
Little River Near Adel
|
3cfs |
Flint River At Ga 32
|
4340cfs |
Flint River At Albany
|
3510cfs |
Muckalee Creek At Ga 195
|
419cfs |
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.
Lower Thornhill Irrigation Pond Dam