I received an email from Laura Dobkine (Laura.dobkine@vnf.f), from the DT Bassin de La Seine and UTI Marne, regarding degradations to the ceiling in the tunnel linking the Lesches and the Chalifert locks on the Marne. Their initial experts said it is probably not going to cave in immediately, but ther situation is "very pre-occupying". They have experts looking at it in more detail on Monday and again on Wednesday with divers below the waterline. They hope to have more sense of a plan for repair by perhaps Friday.
At the moment , consider it likely the tunnel will be closed for at least a month.
So far I only have the email, I have not seen an Avis posted yet beyond the one last week announcing a temporary closure. Email copy is attached below.
There go our Marne plans again. Darn it.