Every mine shall have two separate properly maintained escapeways to the surface which are so positioned that damage to one shall not lessen the effectiveness of the other, or a method of refuge shall be provided when only one opening to the surface is possible.
4 Va. Admin. Code § 25-40-3810
Statutory Authority
§§ 45.1-161.3 and 45.1-161.294 of the Code of Virginia.