Latitude 47 Commerce Center Stormwater Pond

About Latitude 47 Commerce Center Stormwater Pond

The primary purpose of Latitude 47 Commerce Center Stormwater Pond 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 Latitude 47 Commerce Center, Llc (private). It impounds the Offstream, Wollochet Creek.

The dam stands 15 feet tall and stretches 400 feet across, and has a maximum storage capacity of 13 acre-feet. Completed in 2020, the structure is relatively new.

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.

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 Washington dam safety program can provide more specific information about emergency planning for this structure.

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