I don't think there are any WSF down on the columbia. and they get the names from all over WA, like the Spokane fro instance is on the Kingston Edmonds Run nowhere near Spokane, and the Wallawalla is on the Bremerton Seattle run, Also the Tacoma is on the Seattle bainbridge run not the point defiance Vashon Island run.
wtf i know there is a ferry on the columbia, i crossed it on it. it was a really small one, open and maybe only holding 10 cars or so but still called a ferry by washington state.