Evans Dam Reservoir Report
Last Updated: December 5, 2025
Evans Dam, located in Collingsworth, Texas, was completed in 1968 and serves as a crucial water supply structure for the area.
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Summary
This private earth dam, with a height of 28 feet and a hydraulic height of 35 feet, has a storage capacity of 392 acre-feet, with a normal storage level of 240 acre-feet. The dam spans 400 feet in length and covers a surface area of 20 acres. Although it does not have a spillway, the dam is equipped with one outlet gate.
Despite being privately owned, Evans Dam falls under state permitting and inspection regulations, ensuring that it meets safety standards. The dam's hazard potential is categorized as 'Not Available', with a risk assessment rating of 'High'. Although the condition assessment is listed as 'Not Rated', the dam has not undergone any recent modifications and was last inspected in September 2009. While the dam is not under the jurisdiction of any federal agency, it plays a crucial role in providing water resources for the area, particularly for the TR-JONAH CREEK.
Evans Dam stands as a testament to the importance of maintaining and regulating water resources in the face of climate change and increasing water scarcity. As a privately owned structure, it highlights the role that private entities play in managing water supply infrastructure and the need for continued oversight and inspection to ensure the safety and functionality of such vital resources. With its high risk assessment and the absence of an Emergency Action Plan, the dam serves as a reminder of the potential consequences of inadequate maintenance and preparedness in the face of natural disasters or emergencies.
Year Completed |
1968 |
Dam Length |
400 |
Dam Height |
28 |
River Or Stream |
TR-JONAH CREEK |
Primary Dam Type |
Earth |
Surface Area |
20 |
Hydraulic Height |
35 |
Nid Storage |
392 |
Structural Height |
28 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
35 |
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.
Evans Dam