A. In surface structures at excessively dusty mines, electric motors, switches, lighting fixtures, and controls shall be protected by dust-tight construction.
B. Surface structures and equipment shall be kept free of coal dust accumulations.
C. Where mining operations raise an excessive amount of dust into the air, water or water with wetting agent added to it or other effective methods shall be used to allay such dust at its sources.
Code 1950, §§ 45-77, 45-85.5; 1954, c. 191; 1966, c. 594, §§ 45.1-34, 45.1-67; 1978, cc. 120, 729; 1994, c. 28.