Diablo Arroyo Ws Scs Site 1 Dam

About Diablo Arroyo Ws Scs Site 1 Dam

The primary purpose of Diablo Arroyo Ws Scs Site 1 Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by El Paso-hudspeth Swcd;hudspeth County;hudspeth County Crd 1 (local government). It impounds the Diablo Arroyo near Mcnary.

The dam stands 68 feet tall and stretches 1,400 feet across, creates a reservoir covering 32 acres, has a maximum storage capacity of 9,000 acre-feet, and collects water from a drainage area of 29 square miles. Completed in 1960, the structure is well into its service life at over 50 years old.

This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. Notably, no emergency action plan is currently on file for this high-hazard dam. The most recent inspection on record was 02/12/2020.

At 68 feet, this dam is taller than 96% of all dams in the United States.

Living Downstream

If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Texas dam safety program can provide more specific information about emergency planning for this structure.

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