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The study area for the Green River Stormwater Retrofit Planning Project includes the Green/Duwamish River Watershed below Howard Hanson Dam and upstream from the City of Seattle, and the small creek drainages to the west along Puget Sound.

Green River stormwater retrofit project area map - larger

For more information about the Stormwater Retrofit Project, please contact Jim Simmonds, Project Manager, Science and Technical Support Section.