Jensen's Inc. Lake Dam No. 1 (Upper) Reservoir Report

Last Updated: December 5, 2025

Jensen's INC.


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Summary

Lake Dam No. 1 (Upper) in Columbia, Georgia, is a private earth dam completed in 1971 primarily for recreational purposes. Standing at a height of 28 feet with a maximum storage capacity of 50 acre-feet, this dam offers a serene 4-acre surface area for water enthusiasts. Despite being unregulated by the state, the dam has a low hazard potential and a moderate risk assessment rating.

Located in Tanglewood Camp, this dam features an uncontrolled spillway and outlet gates, with a condition assessment that is currently not rated. The last inspection in August 2017 deemed the hazard potential as low, indicating a stable structure for recreational activities. The dam's risk management measures are not specified, but with a moderate risk assessment, it is essential for water resource and climate enthusiasts to monitor any potential changes in the dam's condition to ensure safety and sustainability for future recreational use.

Year Completed

1971

Dam Length

380

Dam Height

28

River Or Stream

UNKNOWN

Primary Dam Type

Earth

Surface Area

4

Hydraulic Height

20

Nid Storage

50

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

28
       
Seasonal Comparison

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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.