Tim:
I won't put a number to it, but it wasn't much earthmoving.
Other than digging bunkers and contouring greens (plus or minus 2 feet from existing grades), the only earthwork we did was a bit of softening at the crest of the 13th fairway, and pushing down the crest of the 15th fairway back toward the landing area so you might have a chance to see the top of the flag for your approach shot.
That's in the same ballpark as Sand Hills. In fact, the site always reminded me a bit of Sand Hills -- not as rugged, just because when we mowed it down you could "play" the whole course prior to construction.