To see the full document that this came from with more info, click HERE.
To see where you can pan for free in this area on public land visit the BLM site HERE.
There are also some claims that can be worked for free such as the ones owned by CRME on the Chetco river, and you can visit their site HERE, although their site does not have a lot of information on how to get there. I have been in contact with CRME and will be posting on their locations at a later date.
It would be worth looking into finding other free mining operations in the area if any exist, as this area of Oregon seems to have many gold bearing regions, along with the area of Northern California directly south.