I. INTRODUCTION I own some common stock in a mining company called Canyon Resources, which owns (inter alia) a lease on a mine in Montana which contains 9.9 million ounces of gold and 30 million ounces of silver in mineralized rock. The mine(1) development project was in the process of obtaining the required permits in November 1998 when the voters of the State of Montana passed initiative which prohibited use of cyanide in a new or expanded mine operation. The practical effect of this prohibition is to make it economically unfeasible to extract the gold and silver from this mine. II. THE CYANIDE MINING PROCESS One of the mining methods used in the United States involves taking low-grade metal ore, crush[ing it,] and plac[ing it] in a pile on a leach pad.(2) The metallic minerals are then extracted sprinkling a leaching agent such as cyanide on top of the heap pile. As the leaching agent is drawn through the heap pile, it binds with the metallic ore and is `recovered through a system of collection channels beneath the heap'.(3) When this is recovered, the metallic mineral is extracted from the solution and the leaching agent is recycled for re-use.(4) If there is any loss or discharge of the leaching agent from the system [,it] will not only cause environmental damage but [will] also [cause] economic loss for the mining operation.(5) This process has been widely used in mines, including several in Montana,(6) for one hundred years or more. During the ten years prior to the 1998 initiative, Canyon Resources invested $70 million in preparing to operate the mine, with the expectation of extracting gold and silver worth up to $600 million.(7) III. INITIATIVE 137 On November 3, 1998, the anti-cyanide mining initiative (I-137) was passed by a 52-48% vote of the Montana electorate.(8) I-137 bars the use of cyanide leaching technology at new open-pit mines. Existing cyanide operations, including expansions, are allowed to continue.(9) So far as I can determine, this is the first statewide ban on cyanide process mining in the United States. Not surprisingly, at least two suits have been filed by other interested parties contesting the validity of I-137, and Canyon Resources is also considering litigation, though it first pursued possible avenues in the political process.(10) The mining community feels strongly that the effect of I-137 constitutes a taking of private for public use without just compensation,(11) in violation of the Fifth and Fourteenth Amendments.(12) As the Supreme Court stated in the early case of Pennsylvania Coal Company v. Mahon,(13) while may be regulated to a certain extent, if regulation goes too far it will be recognized as a taking.(14) Some values incident to property are subject to an implied limitation and must yield to the police power [, but that] implied limitation must have its limits....(15) When the diminution of values in reaches a certain magnitude, in most if not all cases there must be exercise of eminent domain and compensation....(16) IV. THE GRANDFATHER(17) CLAUSE IN I-137 I-137 provides that mine using heap leaching or vat leaching with cyanide ore processing reagents which was operating on November 3, 1998 could continue operating under its existing operating permit, presumably until the mine was exhausted. For Canyon Resources this would have been expected 12-14 years. Any mines already operating on that crucial date might continue their operations for much longer. Opponents of I-137 argued that cyanide had been used safely in mining in Montana and elsewhere for over one hundred years, with no harm to people, and little if evidence of injury to flora or fauna. Strong support for this position is the fact that the proponents of I-137 included the grandfather clause. If there was serious danger of harm to people, animals, or the environment, surely the correct action would be to stop the harmful activity immediately. …
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