Amtrak gateway tunnel construction

[west point]

Questions have arisen over how complicated the construction will be. Here is an article about HS@ construction of a couple tunnel bores. This article only goes into the details of what is required after the TBMs are finished. Note especially the complications of constructing the cross passages.

https://www.railwaygazette.com/uk/first-of-hs2s-deep-tunnels-nears-commissioning-stage/68386.article