What kind of scanner do you use? Or what model? If you have the right kind of trunker, you can scan the frequencies with trunking turned on, and just watch for the varying ID's that pop up. Wish I was closer to Portland, I could grab them for you.
Well my scanner isnt capable of doing that, I would need to setup a radio with t4win or something, I just figured I would ask first if I didnt get any replies I was just going to setup a radio with t4win and see what I get and post my findings.