Cyber Liberty wrote:
"That's gonna leave a mark."
Most folks reading this post have absolutely no idea how many people use the Amtrak/NJ Rail tunnels under the Hudson to Penn Station each day.
If even one of the tunnels (there are two) was lost, it would make travel between New York and New Jersey considerably more difficult, impossible for many. The city's ability to function would be crippled. And that would "leave a mark" like you wouldn't believe, particularly on the overall economy.
The original plan -- the one that Governor Christie rejected (which would have built a new NJ Rail station under 34th street) -- was a bad one, and rightly abandoned.
But the twin tunnels that connect Pennsylvania Station to New Jersey have to be rebuilt -- they're 107 years old (opened in 1910) and have been subjected to the constant wear of passing trains for all that time. They're approaching the point of being worn out.
I've seen them (actually the 4 East River tunnels going the other way) in a way that ordinary folks never will, running through them each day. I've walked in them, even had to get down underneath a train there to put the air hoses back together after they came apart and the train went into emergency at 1.30 in the morning.
There's no way to rebuild them completely, without taking each one out-of-service for the time required (probably 2-3 years). But that would leave only one. You can't run rush hour traffic both ways on one track. You can't even run midday service that way.
That means at least one -new- tunnel needs to be built, so that there can still be two in service during the rebuild.
And with the leaps-and-bounds that traffic has grown into NY Penn in the past 20 years, even two tunnels aren't enough to comfortably handle it any longer.
The money will have to come from somewhere, and New York and New Jersey are broke and can't pay for it all. Nor can Amtrak, which continually runs on the low side of funding.
But the costs of not doing the replacement will eventually be far higher than the price of designing/doing the job.
Aside:
A good book on the construction of Penn Station and the tunnels on both sides of it is "Manhattan Gateway" by the late William D. Middleton. At the time, it was one of the greatest construction projects ever undertaken in America, all privately funded by the Pennsylvania Railroad (back when railroads had the income from both freight and passenger with which to do such things). An astounding amount of money at the time...