In this photo taken Thursday, Dec. 13, 2012, miner Keith Emerald uses a pneumatic drill to drill holes that will be packed with explosives to blast into the sold rock wall at the Sutt

 

              In this photo taken Thursday, Dec. 13, 2012, miner  Keith Emerald uses a pneumatic drill to drill holes that will be packed with explosives to blast into the sold rock wall  at the Sutt
In this photo taken Thursday, Dec. 13, 2012, miner Keith Emerald uses a pneumatic drill to drill holes that will be packed with explosives to blast into the sold rock wall at the Sutter Gold Mining Co's mines near in Sutter Creek, Calif. The company announced Monday, Dec. 17, 2012, that it poured its first gold as it prepared to begin the first large scale Sierra Nevada underground gold mining in a half century. (AP Photo/Rich Pedroncelli)