San Miguel Lignite Mine Dam 15e Reservoir Report
Nearby: Ryan Lake Dam Wheeler Lake No 2 Dam
Last Updated: December 5, 2025
San Miguel Lignite Mine Dam 15e is a private-owned structure located in Jourdanton, Texas, along La Jarita Creek.
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Summary
This earth dam, completed in 1989, stands at a height of 27 feet and stretches 1260 feet in length, with a storage capacity of 5255 acre-feet. The dam serves multiple purposes, with a primary focus on providing water resource management in the area.
Managed by the Mine Safety and Health Administration, the dam has a spillway width of 157 feet and two uncontrolled outlet gates. The structure has a moderate risk rating and is currently in a not rated condition assessment. Despite being regulated, permitted, and inspected by the Texas Commission on Environmental Quality, the dam's hazard potential is not available, highlighting the need for further assessment and risk management measures to ensure its long-term stability and functionality in the face of climate challenges.
For water resource and climate enthusiasts, San Miguel Lignite Mine Dam 15e presents an intriguing case study in dam infrastructure management. With its location in a region susceptible to changing weather patterns, understanding the dam's design, purpose, and risk assessment becomes critical in ensuring the sustainable utilization of water resources in the area. As discussions around climate change and water security continue to evolve, the insights gained from examining this dam can offer valuable lessons in balancing environmental conservation with infrastructure development in a rapidly changing world.
Year Completed |
1989 |
Dam Length |
1260 |
Dam Height |
27 |
River Or Stream |
LA JARITA CREEK |
Primary Dam Type |
Earth |
Surface Area |
89.4 |
Hydraulic Height |
27 |
Drainage Area |
6.24 |
Nid Storage |
5255 |
Structural Height |
27 |
Outlet Gates |
Uncontrolled - 2 |
Hazard Potential |
Not Available |
Foundations |
Soil |
Nid Height |
27 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
San Miguel Ck Nr Tilden
|
0cfs |
Frio Rv At Tilden
|
0cfs |
Atascosa Rv At Whitsett
|
0cfs |
Atascosa Rv Nr Mccoy
|
1cfs |
Choke Canyon Res Owc Nr Three Rivers
|
34cfs |
Nueces Rv Nr Tilden
|
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.
San Miguel Lignite Mine Dam 15e