I just went through it again because I want to review the "4 year" clause comment by Elmer. This would be the "Teck has 4 years to build a mine" clause....I can't find Elmer's comment...

It was during the webcast.

''Teck will have a 4 year time limit in which to place the mine into commercial production''

The legacy of copper mining in Arizona

http://www.youtube.com/watch?feature=player_embedded&v=BucmR-kWwmo#!

Over 60% of the newly-mined copper in the U.S. comes from Arizona.

12 active copper mines in Arizona directly employ nearly 10,000 workers, not including contactors and sub-contractors. Half of Arizona's copper is mined in Morenci. An additional nine copper mines are expected to begin production in the coming years. The Resolution Copper Project, near Superior, is expected to provide 25% of the U.S. demand for copper after it begins production