C.F.R. » Title 30 » CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR › SUBCHAPTER O—COAL MINE SAFETY AND HEALTH › PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES › Subpart E—Combustible Materials and Rock Dusting

30 C.F.R. § 75.403

Maintenance of incombustible content of rock dust

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Where rock dust is required to be applied, it shall be distributed upon the top, floor, and sides of all underground areas of a coal mine and maintained in such quantities that the incombustible content of the combined coal dust, rock dust, and other dust shall be not less than 80 percent. Where methane is present in any ventilating current, the percent of incombustible content of such combined dust shall be increased 0.4 percent for each 0.1 percent of methane.

[75 FR 57857, Sept. 23, 2010; 76 FR 35978, June 21, 2011]
Notes of Decisions
Cited in 2 cases, 1980–1992 · leading case: Cooley v. United States, 791 F. Supp. 1294 (E.D. Tenn. 1992).
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Cooley v. United States, 791 F. Supp. 1294 (E.D. Tenn. 1992). “When MSHA conducted its quarterly inspection of the Grundy mine in October 1981, and during its various other inspections of the same mine in the Fall of 1981, MSHA cited Grundy for violating 30 C.F.R. § 75.403 which provides: Where rock dust is required to be applied, it shall…”
A. T. Collins v. United States, 621 F.2d 832 (6th Cir. 1980). · cites it 2× “30 C.F.R. § 75.403 . However, as noted previously, MESA inspectors determined the adequacy of rock dusting by visual examination [Plaintiffs’ Exhibit 9, p.”
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