Wrightsville

About Wrightsville

The primary purpose of Wrightsville 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 State Of Vermont - Dec (state). It impounds the North Branch Winooski River near Middlesex.

The dam stands 115 feet tall and stretches 1,525 feet across, creates a reservoir covering 190 acres, has a maximum storage capacity of 36,000 acre-feet, and collects water from a drainage area of 68 square miles. Completed in 1935, the structure is well-established, with more than 75 years of service.

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 06/27/2016. That was 9 years ago, which is on the longer end for a high-hazard structure.

At 115 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 Vermont dam safety program can provide more specific information about emergency planning for this structure.

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