Silver is hard to find. There just isn't a lot out there. Depending on where we're at, it's anywhere from surface to 9". lol
I see stonedigger is from Portland and wilvekio's in Pendleton. How about you TDigger?
All of you Portland area people should try to make it to our metal detecting club meetings. Monte Berry runs it and it's called AHRPS. Not sure how much is mentioned about the actual club, but here's his site:
http://www.ahrps.org