Here are some pictures from the mystery circle area. The first one is the sign pointing out the proposed construction. Since north is to the left, it is a little hard to figure out. It looks like most of the damage to historical railroad areas will be D&RGW right of way, but the RGS new yards will have some impact.
The next picture shows the sign with the approximate location of the mystery circle in red. This is just something I sketched and should not be mistaken for an accurate location or size.
I have to go check the BBQ so I don't mess up the ribs, but I'll be back to add more pictures under a separate post.