Green Mt. Lake Reservoir Report

Last Updated: December 5, 2025

Green Mt.


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Summary

Lake, located in Madison, Alabama, is a picturesque Earth-type dam built in 1974 by the USDA NRCS for the primary purpose of serving as a Fish and Wildlife Pond. This 21-foot tall structure holds a maximum storage capacity of 186 acre-feet, with a normal storage level of 120 acre-feet. The dam is situated on the TR-TENNESSEE RIVER, within the jurisdiction of the Mobile District of the USACE.

Despite not being state-regulated, Green Mt. Lake poses a significant hazard potential due to its design and storage capacity, with a moderate risk assessment rating of 3. The spillway, classified as uncontrolled, has a width of 50 feet to manage potential overflow. The dam, being non-federally owned, is primarily funded and designed by the Natural Resources Conservation Service, emphasizing its local government ownership and operation for recreational and ecological purposes.

Enthusiasts of water resources and climate will appreciate Green Mt. Lake for its conservation efforts and habitat enhancement, providing a serene environment for wildlife and recreational activities in the heart of Alabama. The lake serves as a vital ecosystem component, showcasing the importance of sustainable water management practices and the collaboration between federal agencies and local governments to maintain and monitor dam safety and integrity.

Year Completed

1974

Dam Length

600

Dam Height

21

River Or Stream

TR-TENNESSEE RIVER

Primary Dam Type

Earth

Drainage Area

0.5

Nid Storage

186

Hazard Potential

Significant

Nid Height

21
       
Seasonal Comparison

Weather Forecast

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.