Lone Wolf Dam Reservoir Report

Last Updated: December 5, 2025

Lone Wolf Dam, located in San Angelo, Texas, along the South Concho River, has been a vital water supply structure since its completion in 1902.


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Summary

Owned and regulated by the local government with oversight from the Texas Commission on Environmental Quality (TCEQ), the dam stands at a height of 14 feet and spans 350 feet in length. With a storage capacity of 448 acre-feet, the dam plays a crucial role in ensuring water security for the surrounding area.

Despite its age, Lone Wolf Dam has not undergone recent inspections and its condition is currently not rated. The dam's hazard potential is listed as not available, but it is categorized as having a high risk level. The absence of a spillway and limited emergency preparedness measures highlight the need for updated risk management strategies to safeguard against potential disasters. As climate change impacts continue to threaten water resources, ensuring the safety and functionality of Lone Wolf Dam remains a top priority for water resource and climate enthusiasts.

As water resource and climate enthusiasts track the impact of climate change on dams and water infrastructure, Lone Wolf Dam serves as a reminder of the importance of proactive maintenance and risk assessment. With its historical significance and critical role in water supply for the region, efforts to strengthen emergency preparedness and improve risk management at Lone Wolf Dam are essential for ensuring the resilience of water resources in the face of a changing climate.

Year Completed

1902

Dam Length

350

Dam Height

14

River Or Stream

SOUTH CONCHO RIVER

Primary Dam Type

Buttress

Surface Area

32

Hydraulic Height

14

Nid Storage

448

Structural Height

14

Outlet Gates

None - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

14
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.