Glynnwood Lake Reservoir Report

Last Updated: December 6, 2025

Glynnwood Lake in Shelby, Tennessee, is a privately owned reservoir built in 1948 primarily for recreational purposes.


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Summary

The dam, with a structural height of 13 feet and a hydraulic height of 10.5 feet, controls the flow of Johnsons Creek, providing a surface area of 7.4 acres and a storage capacity of 56 acre-feet. Despite being classified as having a low hazard potential, the dam is regularly inspected by the Tennessee Safe Dams Program to ensure its structural integrity and safety.

Managed by private owners, Glynnwood Lake is under the regulatory jurisdiction of the Tennessee Safe Dams Program, which oversees its permitting, inspection, and enforcement. The reservoir's spillway is uncontrolled, and it has no outlet gates or associated locks. With a satisfactory condition assessment as of September 2019, Glynnwood Lake provides a serene recreational environment for water resource and climate enthusiasts to enjoy water-based activities in a picturesque setting. Its moderate risk assessment rating highlights the importance of ongoing monitoring and risk management measures to ensure the safety of the dam and surrounding area.

Located in a tranquil natural setting in Shelby, Tennessee, Glynnwood Lake offers a peaceful escape for visitors seeking outdoor recreation opportunities. With its historical significance dating back to 1948, the reservoir continues to provide a valuable water source for the community while maintaining a low hazard potential. As climate change impacts water resources worldwide, Glynnwood Lake stands as a testament to responsible dam management and the importance of balancing human needs with environmental preservation in the face of evolving climate challenges.

Year Completed

1948

Dam Length

460

River Or Stream

TRIBJOHNSONS CREEK

Primary Dam Type

Earth

Surface Area

7.4

Hydraulic Height

10.5

Drainage Area

0.18

Nid Storage

56

Structural Height

13

Outlet Gates

None

Hazard Potential

Low

Nid Height

13
       
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.