Eo Jonsson Lake No 1 Dam Reservoir Report
Nearby: Eo Jonsson Lake No 2 Dam White Dam
Last Updated: December 12, 2025
Eo Jonsson Lake No 1 Dam, located in Zavala, Texas, was completed in 1974 and serves as a vital water resource for the region.
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Summary
The dam stands at a height of 23 feet and has a capacity of 239 acre-feet, primarily used for fish and wildlife purposes. Situated on Chacon Creek, the dam plays a crucial role in irrigation, fire protection, and stock maintenance in the area.
Owned privately, the dam is not regulated by the state but undergoes regular inspections to ensure its structural integrity and safety. Despite not having a spillway type, the dam is designed to manage high-risk potential, with a hazard rating of 2. While the dam does not have designated emergency action plans, it is equipped with outlet gates for maintenance and operation purposes.
Overall, Eo Jonsson Lake No 1 Dam is a significant component of the local water infrastructure, providing essential resources for wildlife and agricultural activities in the region. Its construction and management highlight the importance of sustainable water management practices in ensuring the long-term viability of water resources and ecosystems in the area.
Year Completed |
1974 |
Dam Length |
6000 |
Dam Height |
23 |
River Or Stream |
CHACON CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
23 |
Nid Storage |
239 |
Structural Height |
23 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
23 |
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.
Eo Jonsson Lake No 1 Dam