| http://www.w3.org/ns/prov#value | - ??unanticipated ground and water conditions; ??adverse claims to water rights and shortages of water to which we have rights; ??adjacent land ownership that results in constraints on current or future mine operations; ??geological problems, including earthquakes and other natural disasters; ??metallurgical and other processing problems; ??unusual or unexpected rock formations; ??ground or slope fa
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