This specimen keys pretty easily to
Onocosmoecus, and it closely resembles
a specimen from Alaska which caddis expert Dave Ruiter recognized as this genus. As with that specimen, the only species in the genus documented in this area is
Onocosmoecus unicolor, but Dave suggested for that specimen that there might be multiple not-yet-distinguished species under the
unicolor umbrella and it would be best to stick with the genus-level ID. I'm doing the same for this one.