Saturday, November 21, 2015 5:38:54 PM
http://technology.infomine.com/reviews/heapleachpads/welcome.asp?view=full
"Montana
One example where the misuse of cyanide has resulted in serious environmental damage is in that of the state of Montana. In this state, the practices of two mines in particular lead to phase out open pit and cyanide leach mining. This was set out in state law in the 1998 citizen?s initiativeI-137.
This citizen?s initiative has since halted any development of other gold projects in the state. The Seven-Up Pete Joint Venture is one such project that has been rendered not economically viable. Metallurgical testing has been carried using alternative lixiviants for extraction, but have all been proven that cyanide heap leaching is the only real option. For more on this, sign in or register for OneMine and read the article by Richard H. De
read the article by Richard H. De Voto on banning cyanide at McDonald mine."
http://lawschool.unm.edu/nrj/volumes/42/1/08_king_minerals.pdf
Dick, PhD Geologic Engineering founded Canyon in Va City and was the leading expert in open pit water safety issues. Spent a lot of time consulting and informing state legislatures on cyanide ( PM's) and sulfuric acid ( copper ) with no harmful affects. 7-Up Pete and MacDonald environmentalist shut down
caused his withdrawing from Gold Resources Oaxaca El Aguila as a 50% partner. Typical miner heavy smoker died lung cancer in 2007. Good friend of the Reids and an early backer GORO as was I. Nice guy. Passed Canyon on to Jimmy Hesketh. Joined with Pegasus and made heap leach work in 60-70s Montana with our Tom Burkhart followed with Pegasus in 80's. 8
http://www.legacy.com/obituaries/denverpost/obituary.aspx?n=richard-h-de-voto&pid=93243633
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