Reilly Lake Reservoir Report

Last Updated: December 5, 2025

Reilly Lake, located in Weaver, Alabama, is a beautiful recreational spot nestled alongside the Tallasseehatchee Creek.


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Summary

This man-made lake was completed in 1945 and spans over 8 acres with a maximum storage capacity of 46 acre-feet. The dam, primarily constructed for recreational purposes, is an earth-type structure with a hydraulic height of 25 feet and a structural height of 11 feet.

Despite its tranquil appearance, Reilly Lake poses a significant hazard potential and is categorized as having a moderate risk level. The spillway, with a width of 100 feet, is uncontrolled, adding to the potential risks associated with the dam. While the dam's condition assessment is currently not rated, the last inspection took place in 1995. With its close proximity to the Tallasseehatchee Creek and a drainage area of 368 acres, the lake serves as a vital water resource for the surrounding community.

For water resource and climate enthusiasts, Reilly Lake offers a fascinating glimpse into the intricate balance between water management and recreational activities. Its historical significance, coupled with its environmental impact, makes it a pivotal location for studying the intersection of human-made structures and natural ecosystems. With ongoing risk assessments and potential management measures, Reilly Lake stands as a testament to the complex relationship between humans and their surrounding water resources in the face of changing climate patterns.

Year Completed

1945

Dam Length

400

River Or Stream

TR TALLASSEEHATCHEE CREEK

Primary Dam Type

Earth

Surface Area

8

Hydraulic Height

25

Drainage Area

368

Nid Storage

46

Structural Height

11

Hazard Potential

Significant

Nid Height

25
       
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.