Is that 22 times as much for just the downtown part or the whole thing?
I saw a documentary on the Dig and it was a lot more involved than I would have guessed. Route to the airport if I recall, and a tunnel under a river, and by 'under the river' I mean that pretty literally. The tunnel wasn't far below the riverbed due to other obstructions so they came in essentially from above to lay it. They filled most of an hour just talking about that section.
I saw a documentary on the Dig and it was a lot more involved than I would have guessed. Route to the airport if I recall, and a tunnel under a river, and by 'under the river' I mean that pretty literally. The tunnel wasn't far below the riverbed due to other obstructions so they came in essentially from above to lay it. They filled most of an hour just talking about that section.