Shamrock Lake Dam Reservoir Report

Last Updated: December 6, 2025

Shamrock Lake Dam, also known as Patrick Lake Dam #2, is a private-owned structure located in Carrollton, Georgia.


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Summary

This Earth dam, with a height of 27.3 feet and a length of 660 feet, serves primarily for recreational purposes as it creates a serene lake with a storage capacity of 169 acre-feet. The dam is classified as having a low hazard potential and a moderate risk assessment, making it an important structure to monitor and maintain for the safety of the surrounding community.

Despite its private ownership, Shamrock Lake Dam falls under the jurisdiction of the state of Georgia and is subject to regular inspections. The dam features an uncontrolled spillway and outlet gates, with no associated locks or locks. While its condition assessment is currently undocumented, the dam is considered to meet safety guidelines and poses a moderate risk. Located in a picturesque setting in Carroll County, Shamrock Lake Dam is a vital component of the local landscape and ecosystem, providing both recreational opportunities and potential risks that must be carefully managed by local authorities.

Water resource and climate enthusiasts interested in Shamrock Lake Dam can appreciate its role in creating a tranquil recreational spot while also acknowledging the importance of ongoing maintenance and monitoring to ensure its safety and functionality. As a private-owned structure with state oversight, Shamrock Lake Dam serves as a reminder of the delicate balance between human enjoyment of natural resources and the need for responsible stewardship to prevent potential hazards and protect the surrounding environment.

Dam Length

660

Dam Height

27.3

River Or Stream

Unknown

Primary Dam Type

Earth

Surface Area

11

Nid Storage

169

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

27
       
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.