That's right. Don't forget about the Highland Valley example.

"As of the end of 2005, proven and probable ore reserves totalled 318Mt grading 0.43% copper and 0.008% molybdenum. Mineral resources added a further 151.9Mt at 0.37% copper and 0.005% moly."

http://www.mining-technology.com/projects/highland/

Even with those grades, Highland Valley remains viable in today's low copper price environment. Of course it's not the cash cow it was four years ago when times were much better, but Teck has seemingly mastered the art of extracting a profit.

Speaking of Teck, their stock is on the verge of eclipsing the $30 mark. That's a long way from the $3.80 low close we saw back in January. Talk about a money-making opportunity!