King County seeks additional funds for a groundwater test wells and expanded cultural resources investigations in order to complete the Willowmoor-Preliminary Design (15-1067) project. To address concerns that the project could interfere with the City of Redmond’s drinking water supply that draws from a shallow groundwater aquifer, we will increase the depth of the groundwater test wells from 40 feet to more than 200 feet, which will increase the cost. Due to a high likelihood of prehistoric use and a desire to avoid impacts to cultural resources, we will excavate a trench along the proposed footprint of the side channel (30% design) as part of the cultural resources investigation. Future construction of this restoration project will enhance Chinook salmon habitat in the Sammamish River through floodplain reconnection, restoring juvenile rearing habitat and adult resting pools with thermal refugia at critical points in the salmon life cycle. Project goals are to reconnect the Sammamish River channel to the adjacent left bank floodplain and wetlands (40 acres) including construction of a new 3,400 linear foot side channel and improve water quality via cold water supplementation. Design deliverables will meet SRFB Manual 18 Appendix D-2 and a basis of design report at the 60% design level per the King County Project Management Manual design requirements.