RE:RE:RE:RE:RE:RE:RE:RE:RE:RE:RE:RE:RE:RE:KSM gold recovery rates?SEA's MTT tunnel complex is estimated to cost about $1 billion. It ensures that tailings are stored in an approved, environmentally secure valley. TC will need approved tailings disposal also. Where? That's what a PEA would tell us. SEA did not design for an MTT because they like to build tunnels. They did it to locate tailings. The only suitable valley is many kms from the orebodies. Therefore tunnels.