Tim, the one near the marshal's campsite is the very low one, where once and a while you see an idiot with a van getting stuck.
Here a few piccies from the collapse:
I don't think any races will get cancelled as they still have just over 4 weeks to get it repaired / filled up.
Trucks could enter the track via the old way, La Source hairpin or Les Combes or even past the med center.
As soon as I get reliable news I'll post it.