Boyanton Dam Reservoir Report
Nearby: Bookout Dam
Last Updated: December 6, 2025
Boyanton Dam, located on the Nueces River in Cotulla, Texas, was completed in 1913 for the primary purpose of irrigation.
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Summary
This earth dam stands at a height of 22.4 feet and has a storage capacity of 3,400 acre-feet, with a normal storage level of 2,984 acre-feet. The dam is state-regulated by the Texas Commission on Environmental Quality (TCEQ) and undergoes regular inspections, enforcement, and permitting to ensure its safety and compliance with state regulations.
With a spillway width of 150 feet and two uncontrolled outlet gates, Boyanton Dam has a moderate risk assessment rating of 3. Although the condition assessment is not rated, the dam is not considered to have a high hazard potential. The dam has not been modified in recent years and is owned by the local government. Water resource and climate enthusiasts may find Boyanton Dam to be an intriguing structure due to its historical significance, purpose of irrigation, and its location on the Nueces River in Dimmit County, Texas.
Year Completed |
1913 |
Dam Length |
417 |
Dam Height |
22.4 |
River Or Stream |
NUECES RIVER |
Primary Dam Type |
Earth |
Nid Storage |
3400 |
Outlet Gates |
Uncontrolled - 2 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
22 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Nueces Rv Nr Asherton
|
0cfs |
Nueces Rv Bl Uvalde
|
1cfs |
Nueces Rv At Cotulla
|
0cfs |
Leona Rv Nr Uvalde
|
0cfs |
Frio Rv Nr Derby
|
0cfs |
Frio Rv Bl Dry Frio Rv Nr Uvalde
|
0cfs |
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.
Boynton Lake Dam