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Green River / Duwamish Service Area

Green River / Duwamish Service Area

Mitigation Reserves Program

Map of Green River Service Area for King County Mitigation Reserves Program


The Green-Duwamish Service Area comprises 675 square miles, including all of WRIA9 except the portion which drains directly to Puget Sound, which is the Central Puget Sound Service Area. Sub basins within the Green-Duwamish Service area include the Upper Green River Basin, Lower Green River Basin, and the Duwamish River Basin. Permittees with impacts to wetlands, streams, and buffers may be able to use the King County In-Lieu Fee Program to offset unavoidable impacts within the Green River/Duwamish watershed.

Mitigation Sites

Chinook Wind Mitigation Project

More Information

General Information for Permittee/Consultants

General Information for Regulators

For questions about King County's Mitigation Reserves Program, please contact program staff.