How much of that is the mine going to take away

Prior to 1978 much of this was private land with resorts and businesses within it. After the USFS took control of it, the buildings were either torn down or burned in place. All of these sites were simply "hidden" from the public. They still exist today along with cars and trucks as well as one below ground "visible" gas pump and tanks as of the last time I was there about 5 years ago. The bulk of the BW that is seen is from the water and very little of the ground is actually seen by man.

When there is no place left with clean water you,your children and grandchildren can drink out of the mine arsenic slime dams.