Presumably the plan would be you're actually building a the collider tunnel much like CERN under water, so effectively a very long pressure structure. This...pr

Presumably the plan would be you're actually building a the collider tunnel much like CERN under water, so effectively a very long pressure structure. This...probably isn't super-unreasonable for a static structure where you avoid the cost of excavation - i.e. it depends on how different in diameter from something like the Nordstream pipelines you'd be going.