I think they said it was 020", but I'll check tonight and confirm.
Update: 020 is a good starting point. The depth should be much more consistent now. The track is smooooth!!! Also, a lot more pit space, without them having to cover the dragstrip or take down the oval. If you have a light to go onto your pit box, be sure to bring it as they are still working on lighting, some pit areas are a bit dark.
Be forewarned, the walk from the parking to the track is a bit of a hump, if you have a wheeled luggage carrier, you may find it helpful. And there are ten steps down stairs into the raceway. A small sacrifice to make sure the raceway stays in operation.
Oh, and better access to the back side of the donut!