Spalding Triangle Lk Dam A (Upper) Reservoir Report
Last Updated: December 14, 2025
Spalding Triangle Lake Dam A (Upper) is a crucial infrastructure in Gwinnett County, Georgia, designed by Mike Bentley Hayes & Assoc.
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Summary
The dam was completed in 1983 and serves the primary purpose of flood risk reduction along Farrell Creek. This earth dam stands at a height of 31 feet with a hydraulic height of 28 feet, providing a storage capacity of 46 acre-feet and a drainage area of 65 square miles.
Despite being classified as having low hazard potential, the dam has not been rated for its condition assessment. It is regularly inspected every 5 years, with the last inspection conducted in October 2016. The risk assessment for Spalding Triangle Lake Dam A (Upper) is considered moderate, highlighting the importance of continued monitoring and maintenance to ensure its integrity and safety. With its uncontrolled spillway and uncontrolled outlet gates, this dam plays a critical role in managing water resources and mitigating flood risks in the region.
Overall, Spalding Triangle Lake Dam A (Upper) is a vital piece of infrastructure that contributes to the protection of the local community from potential flooding events. As water resource and climate enthusiasts, it is important to recognize the significance of this dam in maintaining water storage, drainage, and flood control measures along Farrell Creek. Ongoing efforts to monitor and assess the dam's condition will be essential in safeguarding the surrounding area and ensuring the resilience of this important water resource infrastructure.
Year Completed |
1983 |
Dam Length |
75 |
Dam Height |
31 |
River Or Stream |
FARRELL CREEK |
Primary Dam Type |
Earth |
Surface Area |
3 |
Hydraulic Height |
28 |
Drainage Area |
65 |
Nid Storage |
46 |
Structural Height |
28 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
31 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
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