Hi Jim,
Sadly, the Breckenridge Dredge Restaurant and Bar is entirely a fake. (I suppose "recreation" would be a nicer way to say it.)
There are still remains of a real one out in French Gulch (which joins the Blue River at the north end of town):
Photo credit: Breckenridge Heritage Alliance
That's the Reiling dredge, which sank in 1922.
Merry Christmas, everyone!
Jeff.