Gill Gss 1 Reservoir Report

Last Updated: December 5, 2025

Gill Gss 1 is a private earth dam located in Hemphill, Texas, designed by the USDA NRCS and completed in 1986 for the primary purpose of grade stabilization along the Tr- Washita river.


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Summary

With a height of 26 feet and a length of 547 feet, this dam has a storage capacity of 122 acre-feet and serves as a vital structure for flood control and water resource management in the area. The dam's spillway type is uncontrolled, with a width of 63 feet, and it is considered to have a low hazard potential.

Despite its moderate risk assessment score of 3, the condition assessment for Gill Gss 1 is currently listed as "Not Available" with no recent inspection date provided. The dam is operated with uncontrolled outlet gates, and there is no emergency action plan (EAP) prepared or updated for the structure. While the risk management measures for the dam are not specified, it is important for water resource and climate enthusiasts to monitor the condition and maintenance of Gill Gss 1 to ensure its continued effectiveness in flood control and water management efforts in the region.

Year Completed

1986

Dam Length

547

Dam Height

26

River Or Stream

Tr- Washita

Primary Dam Type

Earth

Surface Area

5

Hydraulic Height

26

Drainage Area

1.31

Nid Storage

122

Structural Height

27

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Soil

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.