since it was under construction during the time Hall when missing. I went to a book talk the author had and asked him about revisiting the site. He said it was done within the past 10 years (when the book came out) with modern scanning equipment and turned up nothing out of the ordinary.
Then there was a farmer that broke his silence last year about seeing two people in a van back in the New River community, chopping up a large animal / something but he was too spooked to say anything back then. Some TV psychic even latched on to the story and pin pointed where it took place. It is quite the mystery.