Flat Top Mine-#1 Impoundment Reservoir Report
Last Updated: December 5, 2025
The Flat Top Mine-#1 Impoundment, located in Jefferson County, Alabama, is a rockfill dam with a hydraulic height of 70 feet and a structural height of 75 feet.
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Summary
Completed in 1979, this dam serves a primary purpose of "Other" and has a storage capacity of 35 acre-feet. While the dam has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment, it has not been inspected in recent years.
Situated along the TR-LOCUST FORK river/stream, the Flat Top Mine-#1 Impoundment is owned by a private entity and is not regulated or permitted by the state. Despite its critical role in water resource management and climate control, this dam has not undergone recent inspection or maintenance, raising concerns about its long-term stability and safety. With a maximum discharge of 115 cfs, this dam plays a crucial role in flood control and water storage in the region.
As water resource and climate enthusiasts monitor the status of dams like the Flat Top Mine-#1 Impoundment, it is important to advocate for regular inspections and maintenance to ensure their continued functionality and safety. With its location in a high-risk area prone to flooding, proper monitoring and management of this dam are essential to prevent potential disasters and protect the surrounding communities and ecosystems.
Year Completed |
1979 |
Dam Length |
3000 |
River Or Stream |
TR-LOCUST FORK |
Primary Dam Type |
Rockfill |
Hydraulic Height |
70 |
Nid Storage |
35 |
Structural Height |
75 |
Hazard Potential |
Low |
Nid Height |
75 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Locust Fork At Sayre
|
168cfs |
Village Creek Near Docena
|
58cfs |
Fivemile Creek Near Republic
|
19cfs |
Mulberry Fork At Cordova Al
|
2820cfs |
Village Creek Near Pratt City
|
31cfs |
Village Creek At Avenue W At Ensley
|
23cfs |
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.
Flat Top Mine-#1 Impoundment