Renamed Tumwater Middle School honors Chinuk Wawa language The Beaverton School Board decided on the name at its Tuesday, Feb. 22 meeting. The Beaverton School Board has selected a name for a new middle school located in the Cedar Mill area. On Monday, Feb. 22, the board unanimously decided on the name Tumwater Middle School for the school located on Northwest 118th Avenue, which has been previously referred to as Timberland. The district solicited input from the overall community, including a Native American parent group and various tribal partners, according to Beaverton School District spokesperson Shellie Bailey-Shah. Tumwater means "waterfall" in the Chinuk Wawa language. The language, also called Shawash-Wawa, originated at the mouth of the Columbia and spread throughout the Pacific Northwest, according to Lane Community College. It served as a language of exchange and trade for tribal and non-tribal people.