The Decker Creek Riparian Conservation Project provides permanent protection for a 500-acre riparian/wetland complex in western Mason County. The project site is a prime candidate for conservation due to its large size, diversity of riparian habitats, high-quality native plant communities, and exceptional habitat for a variety of priority species including summer and fall chinook, coho, chum, stealhead salmonids, cutthroat trout, western toad, great blue heron, pileated woodpecker, and Roosevelt Elk. Priority habitats found on the project site include Freshwater Wetlands (scrub-shrub, emergent, forested), Instream, Riparian, and Snags and Logs.

This project site, a notable feature on the landscape of western Mason County, contains a diversity of riparian/wetland habitats intermingled together that produce a complex mosaic of native plant communities. The site includes extensive riparian habitat, including approximately 2 miles of Decker Creek mainstem. Decker Creek is an important salmon-producing stream and is used for spawning and rearing by coho, summer and fall chinook, chum, steelhead, and cutthroat. Salmonids are abundant in the riparian/wetland complex. Forested areas also provide habitat and cover for a large herd of elk that utilize the site.

This unique site faces imminent threat from a planned timber harvest. Completion of the Decker Creek Riparian Conservation Project will provide the highest level of habitat protection.