Not to be pedantic, but…there’s a big difference between how hardrock mines and coal mines are regulated. Hardrock mines like the one in Colorado or the huge one in Butte, Montana fall under superfund and other mine laws to get cleaned up if they are abandoned. Coal mine restoration has its own set of rules and funding sources. The reason for this difference being important is how restoration and remediation gets funded. Coal has a trust fund. Hard rock mining doesn’t. We could always tax Tesla, Google and Apple products to build a cleanup trust fund for hard rock mines.
For instance, here’s a recent bill on dealing with hard rock mine restoration:
Summary of H.R.963 - 114th Congress (2015-2016): Hardrock Mining Reform and Reclamation Act of 2015www.congress.gov
God only knows what will happen to that under Trump.