Gonzales Reservoir Report

Last Updated: December 5, 2025

Gonzales Dam, located on the Guadalupe River in Texas, serves as a crucial water resource for the region with its primary purpose being hydroelectric power generation.


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Summary

Completed in 1925, this gravity dam stands at a height of 15 feet and has a storage capacity of 1400 acre-feet, providing water supply and flood control benefits to the area. Managed by the local government and regulated by the Texas Commission on Environmental Quality (TCEQ), the dam is also under the jurisdiction of the Federal Energy Regulatory Commission (FERC), ensuring its safe operation and maintenance.

With a significant hazard potential and a moderate risk assessment rating, Gonzales Dam is subject to regular inspections and enforcement measures to ensure its structural integrity and public safety. The dam's spillway, with a width of 178 feet, helps to control the flow of water during peak discharge events, reducing the risk of flooding downstream. The dam's location in Gonzales County, Texas, highlights its importance in water resource management and climate resilience efforts, making it a vital asset for both energy production and water supply in the region.

Year Completed

1925

Dam Length

258

Dam Height

15

River Or Stream

Guadalupe River

Primary Dam Type

Gravity

Surface Area

300

Hydraulic Height

15

Drainage Area

3450

Nid Storage

1400

Structural Height

15

Hazard Potential

Significant

Foundations

Rock

Nid Height

15
       
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.