It’s official: Cascade Water Alliance will be able to use Lake Tapps as a municipal drinking water source and divert an average of 48 million gallons a day from the reservoir in eastern Pierce County.
The state Department of Ecology signed off on the water rights package in September, but presented the official agreement to Cascade’s board during a meeting this week, a news release said.
“Acquiring this water right is a significant step for Cascade,” Lloyd Warren, board chair, said in the release.
Cascade is a consortium of cities and water districts in King County.
A Cascade spokeswoman said back in September that the process of diverting the water from the popular lake wouldn’t actually start for years. The project will take 50 years to fully develop, the news release said.
There still will be enough water for summer recreation and to ensure healthy habitat and salmon runs in the White River, the release said.
The reservoir was built in 1911. Puget Sound Energy used it for years to run a hydroelectric project, but eventually shut the project down.
Cascade eventually bought the reservoir.