Levels were "way above any standards," says Geological Survey hydrologist.
But some townspeople say the outdoors offer better chance for area's future.
A former chairman said he felt "sick" that land-swap is now in the national defense bill.
The controversial bill has been tucked into a "must-pass" national defense spending bill.
Resolution Copper one step closer to accessing a massive copper deposit.
Resolution Copper has been trying to acquire the land for nine years.
Firm operates mine near Dragoon; failed to refinance its debt.
Funds from banquet help in outreach, education.
The Helvetia-Rosemont Mining District at the northern end of the Santa Rita Mountains is known for its copper deposits found in limestone, quartzite, and granite.
Toxic heavy metals may have leached into the water during heavy rains.
Rick Renzi was convicted of extortion, fraud, conspiracy and racketeering.
Pima plans to boost programs in high-demand fields of aviation, mining and manufacturing.
Inclines helped move ore downhill.
This Q&A with company officials covers Rosemont environmental, business, transportation issues.
Grupo Mexico, parent of Tucson-based copper producer Asarco LLC, is expected to complete a deal to take full control the Silver Bell mine west of Marana by acquiring an additional 25 percent ownership stake from a business partner.
Hudbay Minerals Inc. and Augusta Resource Corp. announced early today that the two companies have agreed on a friendly takeover bid for the British Columbia company that owns the proposed Rosemont Mine site near Tucson.
Frontier military outposts in Arizona began with several early presidios established along the Santa Cruz River.
Jerome’s population reached 15,000 during the peak of mining operations during the 1920s.
A Swedish company has agreed to acquire Tucson-based Mintec Inc., a maker of management and modeling software for the mining industry.