Lake Tapps is a reservoir located near Sumner, Washington. Originally, it was created as a hydroelectric project in 1911, but eventually became a popular recreational destination as well. The lake is fed by the White River and is owned by the Cascade Water Alliance. The hydrology of the lake is managed by the alliance, and the water level is raised and lowered throughout the year to meet the needs of downstream water users. Surface flow and snowpack providers for the lake include the White River and the surrounding mountains. Lake Tapps is used for a variety of recreational activities, including boating, fishing, and swimming. The lake also serves as a source of irrigation for local agricultural businesses.