Gao-20-238, Abandoned Hardrock Mines
United States Government Accountability Office Report to the Ranking Member, Subcommittee on Interior, Environment, and Related Agencies, Committee on Appropriations, U.S. Senate March 2020 ABANDONED HARDROCK MINES Information on Number of Mines, Expenditures, and Factors That Limit Efforts to Address Hazards GAO-20-238 March 2020 ABANDONED HARDROCK MINES Information on Number of Mines, Expenditures, and Factors That Limit Efforts to Address Hazards Highlights of GAO-20-238, a report to the Ranking Member of the Subcommittee on Interior, Environment, and Related Agencies, Committee on Appropriations, U.S. Senate Why GAO Did This Study What GAO Found The General Mining Act of 1872 allowed The U.S. Department of Agriculture’s Forest Service, the Department of the individuals to obtain exclusive rights to Interior’s Bureau of Land Management (BLM) and National Park Service, and the valuable hardrock mineral deposits on Environmental Protection Agency (EPA) identified at least 140,000 abandoned land belonging to the United States. hardrock mine features, such as a tunnel, on lands under their jurisdictions. Of Miners explored, mined, and processed these, about 67,000 pose or may pose physical safety hazards—danger of injury valuable minerals, but many did not or death—and about 22,500 pose or may pose environmental hazards—risks to reclaim the land after their operations human health or wildlife from long-term exposure to harmful substances. Agency ended. Unsecured mine tunnels, toxic officials also estimated there could be more than 390,000 abandoned hardrock waste piles, and other hazards—known mine features on federal land they have not captured in their databases, and as mine features—are found at agencies are developing more comprehensive information about these mines.
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