I saw towers like this in the Thurston County photos too, probably 5 of them. I'm trying to figure out what it is. Blockhouse? Home made fire lookout? We most recently saw one about 7 years ago down by Military and 151st in Spanaway at someone's house there but we never knocked and asked like we wanted to, figuring current owners might not have known. I'd love to know about it if anyone has any comment.