As I understand it, Colt & Alison designed the back nine at the Sea Island (Seaside) course, where the PGA Tour is playing this week, in 1928. Tom Fazio redid this nine and completely reworked another nine on the property to create today's course, in 1999.
What about the back nine at today's course is distinctively the work of Colt & Alison? (What features do we look at and say, 'oh yes, that is something Colt or Alison would have built'?) Have the greens contours been preserved? Are the large, flat bunkers something they built at other sites? Or something unique to the Seaside course within their works? Or were they Fazio's additions? How have the strategies of the original design been retained, or not? Do we know anything about how the open water or marshes came into play originally, or the (fake?) dunes? How much of the original design was lost before 1999?
Sorry if this has been discussed previously, but I couldn't find it in the archives.