Cascade Water Alliance

04/27/2026

This week the Cascade Water Alliance will raise the Lake Tapps Reservoir to approximately elevation 543 feet, the maximum allowable level at which Cascade can operate. The reservoir will reach 543 feet on or around May 1 and will then be drawn down slightly, using the leakage from the reservoir, to normal recreational summer levels.

For the latest in current and historic lake level information please visit the Cascade website.

Use of Lake Tapps for recreation and water supply, plus restoration of the White River fishery requires a balanced, cooperative approach. Cascade has cooperative working agreements with water partners around Lake Tapps.

04/07/2026

Check out these Spring 2026 Natural Yard Care Webinars!

02/03/2026

Cascade Water Alliance will begin the spring refill of the Lake Tapps Reservoir on Sunday, February 15. For more information, visit https://cascadewater.org/lake-tapps/lake-levels/.

Cascade has owned and operated the Lake Tapps Reservoir since 2009. During that time, Cascade has managed lake levels in accordance with the provisions of the Lake Tapps Reservoir Water Rights.

12/16/2025

Cascade has been watching the flooding issues very closely, and we are very concerned about what is happening to our neighbors in Pacific.

Cascade's headworks, where water is diverted from the White River, is not currently operational because it is being rebuilt as part of a U.S. Army Corps of Engineers project. The project is not going to be complete until early in 2026. In the meantime, we are unable to divert water.

We are managing water that is entering the system from rainfall and heavy runoff. The reservoir is normally lower in the winter to protect the dikes from breaching and that is true now as well. Too much water, wind, and wave action have the potential to damage or break the dikes, putting the surrounding communities at risk for severe, emergency flooding. Therefore, we keep the winter reservoir at levels required by the State Dam Safety Office for safety reasons.

The mission of Cascade Water Alliance is to provide water supply to meet current and future needs of our members in a cost-effective and environmentally responsible manner through partnerships, conservation, acquiring, constructing and managing water supply infrastructure and fostering regional wate...

12/11/2025

Update from Cascade Water Alliance on Emergency Weather Event and Lake Tapps Reservoir Levels – Dec. 11, 2025 at 9:30 AM. Please visit:

Cascade has owned and operated the Lake Tapps Reservoir since 2009. During that time, Cascade has managed lake levels in accordance with the provisions of the Lake Tapps Reservoir Water Rights.

10/17/2025

Cascade Water Alliance invites the public to join its Water Use Efficiency Public Forum on Monday, November 3 from 11am to 12pm. Check out Cascade's calendar for more information:

The mission of Cascade Water Alliance is to provide water supply to meet current and future needs of our members in a cost-effective and environmentally responsible manner through partnerships, conservation, acquiring, constructing and managing water supply infrastructure and fostering regional wate...

09/08/2025

Cascade Water Alliance has announced a September Update for the 2025 Lake Tapps Reservoir Drawdown. For more information, visit our website:

Cascade has owned and operated the Lake Tapps Reservoir since 2009. During that time, Cascade has managed lake levels in accordance with the provisions of the Lake Tapps Reservoir Water Rights.

08/18/2025

Cascade Water Alliance has announced the 2025 Lake Tapps Reservoir water levels and fall drawdown plan. For more information, visit our website:

Cascade has owned and operated the Lake Tapps Reservoir since 2009. During that time, Cascade has managed lake levels in accordance with the provisions of the Lake Tapps Reservoir Water Rights.

05/12/2025

In case you missed it, today we advertised the RFQ for Program and Engineering Support in the Daily Journal of Commerce and Tacoma News Tribune. Check out our website for the RFQ and addenda throughout the selection process.

View a list of current Cascade Water Alliance projects, RFQs, and RFPs.

04/21/2025

This week the Cascade Water Alliance will raise the Lake Tapps Reservoir to approximately elevation 543 feet, the maximum allowable level at which Cascade can operate. The reservoir will reach 543 feet on or around April 25 and will then be drawn down slightly, using the leakage from the reservoir, to normal recreational summer levels. Learn more here:

Cascade has owned and operated the Lake Tapps Reservoir since 2009. During that time, Cascade has managed lake levels in accordance with the provisions of the Lake Tapps Reservoir Water Rights.