Lamesa Ranch Dam No 1-74 Reservoir Report
Last Updated: December 5, 2025
Lamesa Ranch Dam No 1-74 is a privately owned earth dam located in Webb County, Texas, along the TR-RIO GRANDE river.
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Summary
Built in 1971 by the USDA NRCS, this dam serves multiple purposes including fire protection, stock, and small fish pond management. With a height of 17 feet and a length of 840 feet, the dam has a storage capacity of 90 acre-feet and covers a surface area of 13 acres.
Despite being considered a high-risk structure with a hazard potential that is not available, Lamesa Ranch Dam No 1-74 has not been rated for its condition assessment. The dam does not have a spillway and features no outlet gates other than one. While not under state regulation or jurisdiction, the dam is subject to state permitting and inspection requirements. As water resource and climate enthusiasts, it is important to monitor and assess the risk associated with such structures to ensure their safety and functionality for the surrounding community and environment.
Year Completed |
1971 |
Dam Length |
840 |
Dam Height |
17 |
River Or Stream |
TR-RIO GRANDE |
Primary Dam Type |
Earth |
Surface Area |
13 |
Drainage Area |
0.5 |
Nid Storage |
90 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
17 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Zacate Ck At Laredo
|
0cfs |
Rio Grande At Laredo
|
1760cfs |
San Casimiro Ck Nr Freer
|
0cfs |
Nueces Rv Nr Asherton
|
0cfs |
Nueces Rv At Cotulla
|
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 1-74