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  • Updated

Keeping the Green Valley operation open saves 500 jobs for now, even as local officials prepare for the worst.

  • David Wichner Arizona Daily Star
  • Updated

Plans to close its mining and mill operations in Green Valley this year are on hold.

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Little-known Tucson office, forced to consolidate with UA, sloughs off archives.

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  • By William Ascarza For the Arizona Daily Star

Apache Powder Co. was incorporated on June 11, 1920.

  • Johanna Eubank Arizona Daily Star

We're betting this company changed it's name later on, but in 1916, the term "swastika" didn't carry the same emotion it does today. The symbo…

Re: the June 7 letter "Water for mine, pecan use not the same."

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  • By William Ascarza For the Arizona Daily Star

Rowley Mine is located in the Painted Rock Mining district.

Bolstered by Rio Nuevo's moves, local economy appears to be accelerating

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  • By William Ascarza Arizona Daily Star

The 1950s proved to be the most productive for the Glove Mine.

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  • By William Ascarza Special to the Arizona Daily Star

Fire agate highly sought after gemstone among rock hounds.

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  • By William Ascarza For the Arizona Daily Star

Location, copper prices, limited ore reserves helped end activity.

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  • By William Ascarza Arizona Daily Star

Area faced water challenges.

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Expo aims to help companies through industry slowdown.

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  • By William Ascarza For the Arizona Daily Star

The mine was named after a fort in southern India.

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  • By William Ascarza For the Arizona Daily Star

By 1956, 130,000 tons of ore was mined along with gold, silver, lead and zinc.

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  • By William Ascarza For the Arizona Daily Star

Max Delta Gold Mining Co. began the first underground production in 1913.

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Addition of Oak Flat to national register won't stop copper mining there.

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  • By William Ascarza For the Arizona Daily Star

There are currently 246 historic mining districts across the state.

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A federal judge upheld an arbitrator's decision to pay bonuses to workers hired after June 2011.

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  • By William Ascarza For the Arizona Daily Star

Use of the element molybdenum includes controlling chemical reaction speed.