Heinen Dam Reservoir Report
Nearby: Fairview Farms Dam Williams Dam 3
Last Updated: December 21, 2025
Heinen Dam, located in Atascosa, Texas, is a privately owned earth dam primarily used for water supply from Lucas Creek.
°F
°F
mph
Wind
%
Humidity
Summary
Built in 1968, this buttress dam stands at a height of 16 feet with a length of 980 feet, providing a storage capacity of 179 acre-feet. While the dam does not have a spillway, it is equipped with a single outlet gate for water release.
Despite not being regulated by the state and lacking a hazard potential rating, Heinen Dam is considered to have a high risk level. With no recent inspection or condition assessment data available, the dam's emergency preparedness and risk management measures are unknown. The surrounding area is not designated for inundation mapping, and the overall risk assessment for the dam remains unclear.
For water resource and climate enthusiasts, Heinen Dam poses an intriguing case study of a privately owned infrastructure with limited state oversight and potentially high risk. The lack of recent evaluation and emergency preparedness data highlights the importance of proactive monitoring and maintenance for ensuring the safety and sustainability of water supply structures like Heinen Dam in the face of changing climate conditions.
Year Completed |
1968 |
Dam Length |
980 |
Dam Height |
16 |
River Or Stream |
LUCAS CREEK |
Primary Dam Type |
Earth |
Surface Area |
21 |
Hydraulic Height |
16 |
Nid Storage |
179 |
Structural Height |
16 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
16 |
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.
Heinen Dam