I'm not sure I understand, do you mean that tunnelling teams failed to meet? If that is the case, you must have been misinformed back then: the information that may have been corrupted was that one of the tunnel boring machines was simply driven to the right of the tunnel axis before the end point and left there, because that was deemed cheaper than dismounting it & transporting the parts all the way back.

_{*Lunatic*, n.
One whose delusions are out of fashion.}