Jeffrey Energy Center-auxiliary Make-up

About Jeffrey Energy Center-auxiliary Make-up

Jeffrey Energy Center-auxiliary Make-up is a dam in Pottawatomie, Kansas. The dam is owned by Evergy, Inc. (private). It impounds the Kansas River-tr near Topeka.

The dam stands 114 feet tall and stretches 2,240 feet across, creates a reservoir covering 516 acres, has a maximum storage capacity of 22,000 acre-feet, and collects water from a drainage area of 2 square miles.

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. An emergency action plan is in place for this dam. The most recent inspection on record was 11/01/2022.

At 114 feet, this dam is taller than 98% 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 Kansas dam safety program can provide more specific information about emergency planning for this structure.

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