1998 Montana Initiative 137

Montana Cyanide Process Open Pit Mining Prohibition Initiative (I-137)
November 3, 1998
Concerns mining
Results
Choice
 Votes %
Yes 169,991 52.30%
No 155,034 47.70%
Source: [1]

The Montana Cyanide Process Open Pit Mining Prohibition Initiative, also known as I-137, was a successful initiative on the November 3, 1998 ballot in Montana. It sought to prohibit "new open-pit gold and silver mines that used heap and vat cyanide leach processing".

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