Sean, Number 15 is 401 from the tips (I think you might be in danger of brushing the boundary fence on your backswing if you moved a clublength back from the tee markers at that distance). And the centerline fairway bunker is at about 250 yards. Something like 230 or 240 from a more standard tee location.
OHCC has been bumped up to about 7440 yards, from what was previously about 7140 yards. They did so largely be simply moving tees back wherever it was possible, and not moving tees back where a given hole's second shot dictated it, because in those places, moving the tees back was simply not possible. So terrific holes like 1, 2, 6, 11, and 15 are trapped where their tees are located and are becoming painfully short by 21st century standards.
Lengthening-room was available at 5, 8, 9, 14, and 17, and those holes have been made about as fearsome and as brutal as is tolerable under even benign conditions.