TBM's can fall into a pit of despair. Seattle had a problem with a massive unexpected steel bar down in the pathway. Snowy 2.0 had a problem with grade, with soil and rock density, with water incursion.
Not that this isn't super fun, and interesting, and worth doing, but at this stage in the game, its very early. Across the life of this project a lot of awkward things can happen.
TBM's can fall into a pit of despair. Seattle had a problem with a massive unexpected steel bar down in the pathway. Snowy 2.0 had a problem with grade, with soil and rock density, with water incursion.
Not that this isn't super fun, and interesting, and worth doing, but at this stage in the game, its very early. Across the life of this project a lot of awkward things can happen.