John:
Holes 13-15 were re-routed by a local golf pro in 1949-50 to make room for the highway overpass.
As it turned out, the overpass didn't take up as much space as anticipated, so I recommended restoring the three original holes. We restored 13 and 14 as they were, and did the best we could with the par-4 15th ... had to make it about thirty yards shorter because of the overpass. It was a controversial decision within the club to move forward with the restoration, since only a couple of the members could remember the course with the original Tillinghast routing, and it is a conservative club that doesn't like much in the way of change. There is still a vocal minority of members who dislike the new holes, though no one really argues that it is not a faithful restoration.
We did have to rebuild all of the greens and greenside bunkers a few years ago because of nematode issues. However we did not build new USGA greens ... really all we did was remove the years of topdressing buildup (and the nematodes) and get them back down to original grade. We did reduce the tilt of #2 green a bit; and there are a couple of other greens (#7 and #8) which were rebuilt by others before us and which we just saved as we found them.