Lake Tapps News

2025 Lake Tapps Reservoir Drawdown – September 8, 2025 Update

Cascade Water Alliance previously announced the Lake Tapps Reservoir fall water levels and drawdown plan on August 18. Cascade held reservoir levels higher than normal this summer due to a  >>

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Lake Tapps Reservoir water levels, fall drawdown schedule announced

Lake Tapps, WA – Cascade Water Alliance has announced the 2025 Lake Tapps Reservoir water levels and fall drawdown plan. Due to a construction project at the White River diversion  >>

Phase 2 Milfoil Treatment Week of August 11

Phase 2 of Cascade’s treatment of herbicide ProcellaCOR® treatment is anticipated for the week of August 11. A map of the treatment areas are below. Residents in planned treatment areas  >>

Cascade Announces 2025 Lake Tapps Milfoil Treatment Plan

Cascade Water Alliance, which owns and operates the Lake Tapps Reservoir, conducted a milfoil survey in June. Based on that survey and information received from residents throughout the year, Cascade  >>

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Lake Tapps Reservoir to Rise to 543 Feet

Lake Tapps WA – 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.  >>

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