Twin Lake Estates West Lake Dam Reservoir Report
Last Updated: December 5, 2025
Twin Lake Estates West Lake Dam is a private earth dam located in Medina, Texas, completed in 1964 for recreational purposes.
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Summary
With a height of 18 feet and a length of 1100 feet, the dam has a storage capacity of 165 acre-feet and a surface area of 11 acres. The dam holds back water from the TR-W Prong Atascosa River and has a spillway width of 100 feet.
Despite its recreational purpose, the dam is in poor condition, as indicated by a recent inspection in November 2017. The hazard potential is not available, but the risk assessment is moderate (3). The dam is under the regulatory oversight of the Texas Commission on Environmental Quality (TCEQ) and receives state inspections and enforcement. However, there is no emergency action plan in place, and the condition of the dam raises concerns for water resource and climate enthusiasts. Further monitoring and maintenance may be necessary to ensure the safety and integrity of the Twin Lake Estates West Lake Dam.
Year Completed |
1964 |
Dam Length |
1100 |
Dam Height |
18 |
River Or Stream |
TR-W PRONG ATASCOSA RIVER |
Primary Dam Type |
Earth |
Surface Area |
11 |
Hydraulic Height |
18 |
Drainage Area |
0.8 |
Nid Storage |
165 |
Structural Height |
18 |
Outlet Gates |
Uncontrolled - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
18 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Twin Lake Estates West Lake Dam