Tapps Lake Dike No 8

About Tapps Lake Dike No 8

The primary purpose of Tapps Lake Dike No 8 is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Cascade Water Alliance (public utility). It impounds the Diversion From White River near Auburn.

The dam stands 20 feet tall and stretches 360 feet across, creates a reservoir covering 2,570 acres, has a maximum storage capacity of 53,600 acre-feet, and collects water from a drainage area of 15 square miles. Completed in 1911, the structure is over a century 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 05/19/2022.

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.

Search for dams near your address to see all dams in your area with hazard classifications and safety data.