Download or read book History of Arizona's Clifton-Morenci Mining District: The era of mining by open pit written by Ted Cogut and published by . This book was released on 1999-01-01 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: World War II would bring on a great expansion in both the output and method of copper mining with a shift from underground tunnels to an open pit mine which became the largest copper producer in North America. In 1996, that Morenci Open Pit Mine would set the world-record for mine production.