Lake Echo Reservoir Report

Last Updated: December 5, 2025

Lake Echo, located in Grundy, Tennessee, is a captivating water resource that serves as a critical component of the local government's infrastructure.


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Summary

This earth dam, completed in 1972, boasts a hydraulic height of 18.4 feet and a structural height of 22.1 feet, with a storage capacity of 93 acre-feet. The dam is situated on the Little Fiery Gizzard Creek and covers an impressive surface area of 8.3 acres.

With a significant hazard potential and a moderate risk assessment rating, Lake Echo is an essential structure that requires regular inspections to ensure its safety and integrity. Despite not being state-regulated, this dam plays a crucial role in managing water resources in the area. The dam's uncontrolled spillway and lack of outlet gates highlight the importance of proper risk management measures to prevent potential emergencies and ensure the safety of surrounding communities.

Lake Echo stands as a testament to the intricate balance between human infrastructure and natural resources, providing both water storage and flood control benefits to the region. Its idyllic location and functional design make it a focal point for water resource and climate enthusiasts who appreciate the vital role such structures play in preserving our environment and safeguarding communities against potential hazards.

Year Completed

1972

Dam Length

290

River Or Stream

LITTLE FIERY GIZZARD CK

Primary Dam Type

Earth

Surface Area

8.3

Hydraulic Height

18.4

Drainage Area

0.22

Nid Storage

93

Structural Height

22.1

Outlet Gates

None

Hazard Potential

Significant

Nid Height

22
       
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.