30 CFR Part 57Public Domain
§ 57.4131 — Surface fan installations and mine openings
Subpart C — Fire Prevention and Control
(a)On the surface, no more than one day's supply of combustible materials shall be stored within 100 feet of mine openings or within 100 feet of fan installations used for underground ventilation.
(b)the one-day supply shall be kept at least 25 feet away from any mine opening except during transit into the mine.
(c)Dry vegetation shall not be permitted within 25 feet of mine openings.
Public Domain: 30 CFR Part 57 (MSHA Safety and Health Standards — Underground Metal and Nonmetal Mines) is a U.S. government publication and is not subject to copyright. Text extracted from the official source ↗. Figures are served from the eCFR; if one does not load, use the link in its place.