Maintenance of Incombustible Content of Rock Dust in Underground Coal Mines (US Mine Safety and Health Administration Regulation) (MSHA) (2018 Edition) The Law Library presents the complete text of the Maintenance of Incombustible Content of Rock Dust in Underground Coal Mines (US Mine Safety and Health Administration Regulation) (MSHA) (2018 Edition). Updated as of May 29, 2018 This final rule replaces the Mine Safety and Health Administration's Emergency Temporary Standard (ETS) pursuant to section 101(b) of the Federal Mine Safety and Health Act of 1977. The final rule adopts the requirements contained in the ETS. Under the final rule, mine operators must maintain the incombustible content of combined coal dust, rock dust, and other dust to at least 80 percent in underground areas of bituminous coal mines. The final rule further requires that the incombustible content of such combined dust be increased 0.4 percent for each 0.1 percent of methane present. This book contains: - The complete text of the Maintenance of Incombustible Content of Rock Dust in Underground Coal Mines (US Mine Safety and Health Administration Regulation) (MSHA) (2018 Edition) - A table of contents with the page number of each section