§ 57.22602. Blasting from the surface (I-C mines).
45 words·~1 min read·
/us/cfr/t30/s§ 57.22602·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
(a)All blasting shall be initiated from the surface after all persons are out of the mine and any connecting mines.
(b)Persons shall not enter the mine until a competent person has examined the blast sites and methane concentrations are less than 0.5 percent.