Private property ping. If this had been a National Park, it would have been looted long ago.
And, now it has, for $600/acre.
In this case, the preservation is excellent precisely because it was private property--the owner kept the public off and did not mess with the ruins at all. A great find.
However that is not always the case. I used to work as an archaeologist on a National Park that was previously private property (in New Mexico). The 'chaining' that was done by the ranchers left most of the smaller ruins as jumbled piles of rubble. They appeared to have used bulldozers to push the trees into large piles for burning after the chaining. This bulldozer activity often left a swath of architectual stone at least 100 yards long. Complete obliteration.
I'd say roughly 25% of the sites we found over the course of a 3 year survey were in this state.
Depends on the owner and the bucks dangled in front of his nose. If this were in Northern Virginia, it would already have a strip mall and 7,000 homes on top of it.