Atna Resources Ltd. issued an operational update on its mining activities in the United States, where the company is active in developing a gold operation in California.

Atna Resources Ltd. has started an exploration program at the Briggs Mine, located in Inyo County, California. The purpose of the program is to more properly define the gold bearing formation at the project site.

Atna Resources Ltd. said that the program will involve up to 30,000 feet of reverse circulation rotary drilling. The company hopes to determine the potential gold reserves in the BSU, Argonaut and Main Briggs pits.

Atna Resources Ltd. will also conduct infill drilling at the North Main Briggs pit in an attempt to convert inferred mineral reserves to the proven and/or probable category. The company will also investigate a deeper resource zone at the Briggs mine to determine its mineral resource potential.

Atna Resources Ltd. reported that the Briggs Mine produced more than 25,000 ounces of gold in 2010, generating $30 million in revenues for the company.

Atna Resources Ltd. has exploratory and developed mining properties in many areas of the United States and Canada. The company reported total proved and probable reserves of 406,000 ounces of gold.

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