Coweeman River

Coweeman River Joint Wetland and Conservation Bank

The Coweeman River Joint Wetland and Conservation Bank is being proposed on 315 acres along the Coweeman River in Cowlitz County, Washington. Upon certification by the Interagency Bank Review Team, the Bank will provide compensatory mitigation for unavoidable impacts to wetlands and other aquatic resources, as well provide conservation credits for impacts to special status salmonid species listed under the Endangered Species Act (ESA). The Bank project is being proposed through Washington State’s Mitigation Banking Program, co-chaired by the U.S. Army Corps of Engineers (USACE) and the Washington State Department of Ecology (Ecology) and will also be reviewed by the National Oceanic and Atmospheric Administration (NOAA) as a conservation bank.


The project includes approximately 100 acres within the tidally influenced portion of the Coweeman River floodplain and approximately 200 acres of old growth forest surrounding the river. The old growth forest includes wetlands and small tributaries that flow into the Coweeman River. The project will restore wetlands and riparian areas within the floodplain and preserve critical wetland, upland and riparian habitat within the old growth forest areas.