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California plans to build a 13.5-mile tunnel for the High-Speed Rail to San Franscisco Bay Area
California’s High-Speed Rail Authority has plans for 13.5-mile long twin tunnels through the Pacheco Pass. There are also some additional shorter tunnels planned.
Some raise concerns about tunneling under the Pacheco Pass. They say the tunnel must cross an active seismic fault and in general concerned about the difficulty of tunneling due to the geology of the area.
All this provided that the funding is arranged
cover tunnel photo by: Matt Brown from London, England / CC BY
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"The mountains aren’t made up of just one material. Instead, they’re a chaotic mix of shale studded with much harder chunks of metamorphic rock, he said, ranging in size “from a baseball up to my house or a car”.
Expect a lot of boulders. So?
https://www.mercurynews.com/2020/05/03/got-13-billion-planning-for-high-speed-rails-bay-area-link-continues-without-money-to-make-it-happen/
Got $13 billion? Planning for high speed rail’s Bay Area link continues, without money to make it happen
www.mercurynews.comIt’s also not clear whether $13 billion will cover the actual cost of the “Valley-to-Valley” segment of the project, which includes an ambitious tunnel through the Pacheco Pass.