There are things that can't be planned for. One of the major problems detected was the fact that they had to drill through dolostone, which is a huge technolog

There are things that can't be planned for. One of the major problems detected was the fact that they had to drill through dolostone, which is a huge technological challenge. When mixed with water it results in a soupy mixture, which is almost impossible to work with in drilling a tunnel. The did exploration drillings in 1993, but engineers where still pretty worried. It was only in 2008 that the engineers lost the last of their concerns. Such a huge project comes with technical uncertainties. What do you want to do about it?