Martinena Ranch Lake Dam Reservoir Report
Last Updated: February 13, 2026
Martinena Ranch Lake Dam, located in Webb County, Texas, was completed in 1979 by the USDA NRCS and serves various purposes, including water resource management.
Summary
This private dam stands at a height of 11 feet and has a length of 1900 feet, with a storage capacity of 264 acre-feet. The dam is primarily an earth dam with a buttress core type, designed to withstand the flow of TR-LOS OLMOS CREEK.
Although the dam does not have a spillway, it is equipped with one outlet gate for water release. Despite not being state-regulated, the dam undergoes regular inspections and has been deemed to have a high risk potential. The dam's condition is currently not rated, and there is no available emergency action plan for the structure. As a key feature in the region's water management system, Martinena Ranch Lake Dam remains a critical infrastructure for local water resources and climate enthusiasts to monitor and support.
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Humidity
15-Day Weather Outlook
Year Completed |
1979 |
Dam Length |
1900 |
Dam Height |
11 |
River Or Stream |
TR-LOS OLMOS CREEK |
Primary Dam Type |
Earth |
Surface Area |
33 |
Hydraulic Height |
11 |
Nid Storage |
264 |
Structural Height |
11 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
11 |
Seasonal Comparison
5-Day Hourly Forecast Detail
Nearby Streamflow Levels
San Casimiro Ck Nr Freer
|
0cfs |
Nueces Rv At Cotulla
|
0cfs |
Zacate Ck At Laredo
|
1cfs |
Rio Grande At Laredo
|
1760cfs |
Nueces Rv Nr Tilden
|
0cfs |
Nueces Rv Nr Asherton
|
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.
Martinena Ranch Lake Dam