“U.S. uranium exploration drilling was 5,441 holes covering 3.3 million feet in 2011. Development drilling was 5,156 holes and 3.0 million feet. Combined, total uranium drilling was 10,597 holes covering 6.3 million feet, 47 percent more holes than in 2010. Expenditures for uranium drilling in the United States were $54 million in 2011, an increase of 20 percent compared with 2010…U.S. uranium mines produced 4.1 million pounds U3O8 [uranium concentrate or yellowcake]. in 2011, 3 percent less than in 2010, from 10 mines (underground and in-situ-leach) and one other source. Five underground mines in Arizona, Colorado, and Utah produced ore containing uranium during 2011, one more than during 2010. Uranium ore is stockpiled and shipped to a mill, to be milled into uranium concentrate (a yellow or brown powder). Additionally, five ISL mining operations in Nebraska, Texas and Wyoming produced solutions containing uranium in 2011 that was processed into uranium concentrate at ISL plants.”
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