[Code of Federal Regulations] [Title 30, Volume 1] [Revised as of July 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 30CFR57.4560] [Page 340-341] TITLE 30--MINERAL RESOURCES CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR PART 57_SAFETY AND HEALTH STANDARDS_UNDERGROUND METAL AND NONMETAL MINES --Table of Contents Subpart C_Fire Prevention and Control Sec. 57.4560 Mine entrances. For at least 200 feet inside the mine portal or collar timber used for ground support in intake openings and in exhaust openings that are designated as escapeways shall be-- (a) Provided with a fire suppression system, other than fire extinguishers and water hoses, capable of controlling a fire in its early stages; or (b) Covered with shotcrete, gunite, or other material with equivalent fire protection characteristics; or (c) Coated with fire-retardant paint or other material to reduce its flame [[Page 341]] spread rating to 25 or less and maintained in that condition. [50 FR 4082, Jan. 29, 1985, as amended at 50 FR 20100, May 14, 1985]