This one pretty clearly keys to Kogotus, but it also looks fairly different from specimens I caught in the same creek about a month later in the year. With only one species of the genus known in Washington, I'm not sure about the answer to this ID.
Konchu on Nov 6, 2010November 6th, 2010, 2:56 am EDT
Some of those with a persuasion towards literature will appreciate this nugget of trivia I just gleaned from some pleasure reading (if you did not know it already).
Walton's The Compleat Angler is the third most-published work of English literature, behind the Bible and the "compleat" works of Wm Shakespeare.