The owner of the only active, large-scale gold mine in South Dakota has to post millions more in bond money.
The Wharf Mine is near Lead, in the northern Black Hills. Coeur Mining is the Chicago-based company that runs the mine.
South Dakota requires Coeur to post bonds. That's in case the company ever goes bankrupt. If that happens, the state could use the bond money to clean up the mine.
The amount of the bonds is $64 million. But the state Department of Environment and Natural Resources said it's reviewed the amount, and it’s too low.