Flood zone district outlines proposed flow-through retention facility, mitigation plans and public comment schedule

Dec 19, 2025

Lewis County Flood Control Zone District officials presented a revised flow-through flood retention facility for the Chehalis Basin, described environmental mitigation and modeled benefits (including an estimated 62,000 acre-feet capacity and about 2,600 structures potentially protected), and set public comment deadlines and hearings on the revised draft EIS.

The full story

Lewis County flood authorities on Monday briefed residents and stakeholders on a proposed flow-through flood retention facility intended to reduce catastrophic flooding across the Chehalis Basin and protect communities downstream from Centralia to Aberdeen.

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