Griffin Lake Dam Reservoir Report

Last Updated: December 5, 2025

Griffin Lake Dam, located in Eastland, Texas, is a privately owned earth dam built in 1970 for multiple purposes including fire protection, stock maintenance, and recreation.


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Summary

Standing at a height of 20 feet with a length of 825 feet, the dam holds a storage capacity of 250 acre-feet of water, with a normal storage level of 90 acre-feet. Despite its primary purpose, the dam also serves as a small fish pond and provides recreational opportunities in the area.

With a hazard potential of "Not Available" and a risk assessment rating of "High", Griffin Lake Dam is a key structure in the region for water resource and climate enthusiasts to monitor closely. The dam does not have a spillway but is equipped with a single outlet gate. While the dam's condition assessment is currently "Not Rated", regular inspections are conducted to ensure its integrity. The dam is not under state jurisdiction but is subject to state permitting and inspection, highlighting the importance of compliance with regulations for its safe operation.

As a significant feature on the TR-South Fork Leon River, Griffin Lake Dam plays a crucial role in managing water resources and protecting against hazards in the area. Its location in Eastland, Texas, under the oversight of the Fort Worth District, emphasizes the importance of sustainable water management practices and maintaining the dam's structural integrity for the benefit of both local communities and the environment.

Year Completed

1970

Dam Length

825

Dam Height

20

River Or Stream

TR-SOUTH FORK LEON RIVER

Primary Dam Type

Earth

Surface Area

15

Hydraulic Height

20

Nid Storage

250

Structural Height

20

Outlet Gates

None - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

20
       
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.