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

Lewis County is stepping up to combat flooding with a groundbreaking flow-through retention facility that could protect over 2,600 structures across the Chehalis Basin!

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