Interesting that Hoover Dam mentioned elsewhere in the thread also had problems with geology of the rocks under it and had to be fixed in a hacky way by additio

Interesting that Hoover Dam mentioned elsewhere in the thread also had problems with geology of the rocks under it and had to be fixed in a hacky way by additional grouting for 12 years after completion http://web.mst.edu/~rogersda/hoover_dam/Grout%20Curtain%20Failure-Hoover%20Dam.pdf http://web.mst.edu/~rogersda/hoover_dam/Grout%20Curtain%20Fa...