The MV Chimacum is the third vessel of the Olympic-class auto ferries for the Washington State Ferries system. The ship was built by Vigor Industrial in Seattle, Washington and entered service on the Seattle–Bremerton route in 2017. Funding for a third Olympic class was authorized in the Spring 2014 session of the Washington State Legislature and the keel laying and first weld took place on December 9, 2014. The name Chimacum, the gathering place of the Chemakum tribe, was chosen by the Washington State Transportation Commission in November 2014.