The claim: Federal prison satellite camp northwest of Salem.
Other claim: FEMA detention center.
What it really is: Yes, there is a Federal prison camp there. It's minimum security, and is part of a medium security prison. This is all publicly known.
As for the FEMA detention center claim, most likely it's the same minimum to medium security prison as stated above.
It should also be noted that this is the only Federal prison in Oregon.