Environmental Review Summary

USACE and Ecology reviews of flood retention project

The Chehalis River Basin Flood Control Zone District (Applicant) is proposing to construct a flood retention dam and associated temporary reservoir on the Chehalis River near Pe Ell, and make changes to the Chehalis-Centralia Airport levee. The Washington Department of Ecology (Ecology) and the U.S. Army Corps of Engineers (USACE) are completing separate environmental review processes under their regulatory authorities. Click the following links to learn more about each agency’s environmental review process:

Although separate environmental review processes are being completed, USACE and Ecology are coordinating and using similar data and methodologies while still preserving the integrity of the separate state and federal processes. The agencies are also coordinating with the Applicant for information on the proposed project to support the technical evaluation of probable impacts.

Relationship to Chehalis Basin Strategy

Communities in the basin are working with the Chehalis Basin Board on a long-term strategy to reduce flood damage and restore aquatic habitat. One part of this strategy is to consider large-scale flood damage reduction actions. The project evaluated in the NEPA and SEPA environmental reviews is one of the proposed actions for consideration. The Chehalis Basin Board is expected to use the information in the environmental reviews, along with other information, to inform their recommendations for the long-term strategy.