Stp Main Cooling Reservoir Dam

About Stp Main Cooling Reservoir Dam

Stp Main Cooling Reservoir Dam is a dam in Matagorda, Texas. The dam is owned by Stp Noc (private). It impounds the Off Ch-colorado River.

The dam stands 46 feet tall and stretches 65,505 feet across, creates a reservoir covering 7,000 acres, has a maximum storage capacity of 250,000 acre-feet, and collects water from a drainage area of 10 square miles. Completed in 1981, the structure is 45 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. An emergency action plan is in place for this dam. The most recent inspection on record was 05/23/2024.

At 46 feet, this dam is taller than 91% of dams nationwide.

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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