This is very close to where I live - unfortunately, I think they finished their study and filled it back in, would have been cool to visit.
They fill in digs to protect them. At some point in the future, there may be enough interest and will to uncover it, protect it and make it visitable for the public. That’s what they’re doing with their great Roman ruins in Spain, and also even what we are doing here in Florida with our few 17th c. Spanish stone ruins (or the little that remains of them).
The "Keith Richards was here" graffito was authentic, btw.