废弃硬石矿：土地管理机构应改进总清理成本报告
Abandoned Hardrock Mines: Land Management Agencies Should Improve Reporting of Total Cleanup Costs
【关键词】 Cost estimates ; Environmental cleanups ; Environmental contamination ; Environmental liabilities ; Hardrock mines ; Hazardous waste site remediation ; Mining ; Soil contamination ; Financial statements ; Accounting standards ;
联邦土地上有数千个废弃的硬岩矿山特征，如矿井或隧道，这些特征可能对人类健康或野生动物构成风险
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