Matthew,
Grand opening is set for July 27-28. They will allow limited play just before that, to special guests and frequent customers. This assumes the weather allows complete grow in. They had a great fall, but winter snow cover is a bit light, so they may have some winter dessication.
My goals were to make the course completely different as the same architect could make adjacent courses - thus emphasis on the industrial scars vs nature, square vs free form tees, large rolling greens vs small flatter ones, etc. They also wanted a more difficult course and one that was entirely walkable. Except for two elevated tees, (I suggested they move some of the old ski lifts over there) it is very walkable.
As to difficulty, it came back with the highest slope rating in the state, assuming the 20 handicapper would play from the back tees. From the forward tees, and when the fescues get cut to proper width, I think it will be emminently playable.
If you go to my website, there is a link and/or copies of my Architects Corner series on Cybergolf.com covering the construction of the Quarry. That explains what - or as some say "What in the hell was I - thinking! You may note the introduction of my new question and answer series there, "Everything you wanted to know about golf architecture," but for technical reasons, they haven't even got question/answer number one up yet.
So much the better for me. They are supposed to have gone up at the rate of twice a week, and I have new respect for writers who have to make deadlines.