Welder Lake No 9 Dam Reservoir Report
Last Updated: December 5, 2025
Welder Lake No 9 Dam, located in La Salle, Texas, was completed in 1964 and serves as a crucial water supply structure in the region.
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Summary
This private-owned earth dam stands at a height of 15 feet and has a length of 725 feet, with a capacity to store up to 132 acre-feet of water. The primary purpose of the dam is to provide water for various uses, contributing to the sustainability of the local water resources.
Despite being a non-federally regulated structure, Welder Lake No 9 Dam poses a high risk (2) due to its condition assessment being not rated and the lack of emergency preparedness measures in place. The dam lacks a spillway and is associated with Piedra Creek, further highlighting the importance of regular inspections and maintenance. Climate and water resource enthusiasts are drawn to the significance of this dam in the context of managing water supply in a region prone to drought and other climate-related challenges.
With the potential for high hazard and the critical role it plays in water supply, Welder Lake No 9 Dam stands as a focal point for discussions on water resource management and climate resilience. As efforts are made to address the risk associated with this structure, it serves as a reminder of the complexities and importance of maintaining infrastructure in the face of changing climate patterns and increasing water demands.
Year Completed |
1964 |
Dam Length |
725 |
Dam Height |
15 |
River Or Stream |
PIEDRA CREEK |
Primary Dam Type |
Earth |
Surface Area |
10 |
Hydraulic Height |
15 |
Nid Storage |
132 |
Structural Height |
15 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
15 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
San Casimiro Ck Nr Freer
|
0cfs |
Nueces Rv Nr Tilden
|
0cfs |
Nueces Rv At Cotulla
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0cfs |
Frio Rv At Tilden
|
0cfs |
San Miguel Ck Nr Tilden
|
0cfs |
Frio Rv Nr Derby
|
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.
Welder Lake No 9 Dam