Gialla Lake Dam Reservoir Report
Last Updated: December 6, 2025
Gialla Lake Dam, located in Maverick County, Texas, was completed in 1963 and serves as a vital water supply for the surrounding area.
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Summary
This privately owned earth dam stands at a height of 24 feet and spans a length of 975 feet, with a storage capacity of 288 acre-feet. The primary purpose of the dam is for water supply, specifically drawing from the TR-San Ambrosia Creek.
Despite being a privately owned structure, Gialla Lake Dam falls under state regulation for permitting and inspection, ensuring its safety and compliance with standards. The dam's hazard potential is not available, and its condition remains unrated. However, a high risk assessment level of 2 indicates the need for continued monitoring and risk management measures to prevent any potential hazards.
The dam lacks a spillway and has one outlet gate, suggesting limited discharge capabilities. With its strategic location and critical role in water supply, Gialla Lake Dam stands as a significant infrastructure contributing to water resource management and climate resilience efforts in Maverick County, Texas.
Year Completed |
1963 |
Dam Length |
975 |
Dam Height |
24 |
River Or Stream |
TR-SAN AMBROSIA CREEK |
Primary Dam Type |
Earth |
Surface Area |
13 |
Hydraulic Height |
24 |
Nid Storage |
288 |
Structural Height |
24 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
24 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Gialla Lake Dam