Matt, I assume you get paid to tell the world whether a course is #1 or #1000....I don't.
I did not find Old Works to be all that special. Yes, the location is different and somewhat fascinating, but the golf course is not that difficult. Oh, I suppose if you are crazy enough to play it from the 8000+ yard tees it's a challenge, but seriously, what is so great about wide open fairways that offer no challenge off the tee, nearly flat greens, and little or no fairway bunkering?
Canyon River on the other hand is not that long...6900 yards from the tips...but it does challenge you on nearly every tee...the 10th might be the only wide open fairway on the course where you can rear back and smack the ball with no worries about where it goes.
Canyon River is in great shape. The fairways are full and play firm...at .75" height of cut they do not run as much. The greens are firm...the day I played we had several hole locations that just plain made us laugh they were so difficult to get a second shot ball close to...and putting to them was fun.
As for your ratings...there's some good golf in Montana, and my guess is you don't go looking for it. The fact that a course like Eagle Bend is even remotely considered Top 3 in the state tells me someone isn't looking very hard for the better courses....but for my money...Canyon River and Phantom Hills...two courses here in Missoula, are better than Old Works.