Lamesa Ranch Dam No 1-63 Reservoir Report
Last Updated: December 19, 2025
Lamesa Ranch Dam No 1-63, located in Zapata, Texas, is a privately owned earth dam designed by the USDA NRCS in 1963.
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Summary
With a primary purpose of fire protection, stock, or small fish pond, the dam stands at a height of 10 feet and stretches 800 feet in length. It has a storage capacity of 94 acre-feet and covers a surface area of 23.5 acres, serving as a vital resource for water conservation in the region.
Although the dam does not have a spillway, it is equipped with one outlet gate for water release. The risk assessment for Lamesa Ranch Dam No 1-63 indicates a high hazard potential, emphasizing the importance of regular inspections and maintenance. While the dam's condition assessment is currently not rated, its strategic location on the TR-Rio Grande river makes it a key structure for water management and climate resilience efforts in the area.
As part of the Galveston District, the dam plays a crucial role in water resource management, providing essential support for agricultural activities and wildlife habitats. With its historical significance and continued relevance in the present day, Lamesa Ranch Dam No 1-63 serves as a testament to the importance of sustainable water infrastructure for the community and the environment.
Year Completed |
1963 |
Dam Length |
800 |
Dam Height |
10 |
River Or Stream |
TR-RIO GRANDE |
Primary Dam Type |
Earth |
Surface Area |
23.5 |
Drainage Area |
0.9 |
Nid Storage |
94 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
10 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Rio Grande At Ft Ringgold
|
2110cfs |
Rio Grande At Laredo
|
1760cfs |
Zacate Ck At Laredo
|
0cfs |
Los Olmos Ck Nr Falfurrias
|
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.
Lamesa Ranch Dam No 1-63