There’s simply too many things to restore. They are building metro in my town now. They started working on a new line, digging under first street and boom, Roman graveyard. Had to examine and remove 500 graves before they could continue. It’s like that all the time. So yeah, sometimes people don’t wait for specialists or permits and fuck things up. It’s not that often and it happens to some less important works. It’s only in the news because it’s funny.
One starts to get the impression that they should just have the archeologists dig the tunnel in the first place, and budget the project like one big find.