U.S. Rep. Raúl Grijalva of Tucson and two others are bringing back an oft-tried bill to overhaul the country’s 142-year-old hard-rock mining law and charge royalties for copper and other non-coal mining operations on public lands.

The bill would also prevent mining on certain kinds of environmentally sensitive public lands and establish an abandoned mine cleanup fund, paid for by a separate fee on mining companies.

The royalty would be set at 12.5 percent on the gross income derived from mining claims on federal land.

Read the rest of this story Sunday in the print edition of the Arizona Daily Star.