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City Nevada City / / Country United States / / / Event Product Issues / / Facility North Star Mining Museum / Empire Mine / Convention Center / Cyanide plant / EMSHP Visitor Center / mill Stop / Sand Dam / / IndustryTerm http / NaturalFeature Grass Valley / / Organization Mineralogical Society of America / / Person Charlie Alpers / / Position mine superintendent / / Product mine drainage / / ProvinceOrState California / / Technology constructed wetland system / / URL http /
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