King County Water and Land Resources Division proposes to complete preliminary design of the Willowmoor Floodplain Restoration Project to enhance Chinook salmon habitat in the Sammamish River by creating a) juvenile rearing habitat through floodplain reconnection as well as bank geometry improvements in the mainstem, and b) adult resting pools with thermal refugia at a critical point in the journey to spawning grounds in Issaquah Creek. Besides Chinook salmon, the project will also benefit other native migratory and resident fish species including Sockeye/Kokanee, Coho, Steelhead, Cutthroat trout and Lamprey. The project is located just downstream of Lake Sammamish in the uppermost reach of the Sammamish River. Future restoration will provide the following key ecological benefits: reconnecting the Sammamish River channel to the adjacent left bank floodplain and wetlands (up to 40 acres); enhancing the quantity and quality of aquatic and riparian habitat along the river channel; restoring adjacent tributaries and improving their connectivity to the river; removing and controlling invasive vegetation; and improving Sammamish River water quality (lower temperatures, higher dissolved oxygen levels) via cold water supplementation during hot weather periods. This grant will be used to fund preliminary design which will meet the deliverable standards outlined in SRFB Manual 18, Appendix D­3.