Yes, this is a huge disaster and I feel for everyone that has been impacted by this situation.
I'm not a dredger nor have I ever mined for gold (I've always wanted too, though).
I find this disaster so ironic. . . if a dredger had un-plugged this abandoned mine and caused this horrific catastrophy, there wouldn't be any dredging allowed ANYWHERE along ANY river EVER.
When things start getting back to normal, I would hope that the "hell & brimstone" enviro attitude toward dredging would change for the better. . . or at least be logical.
My thoughts are with you guys.