[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: 30CFR77]

[Page 634]
 
                       TITLE 30--MINERAL RESOURCES
 
  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
 
PART 77_MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK 
AREAS OF UNDERGROUND COAL MINES--Table of Contents
 
                        Subpart D_Thermal Dryers
 
Sec.  77.307  Thermal dryers; location and installation; general.

    (a) Thermal dryer systems erected or installed at any coal mine 
after June 30, 1971 shall be located at least 100 feet from any 
underground coal mine opening, and 100 feet from any surface 
installation where the heat, sparks, flames, or coal dust from the 
system might cause a fire or explosion.
    (b) Thermal dryer systems erected or installed after June 30, 1971 
may be covered by roofs, however, such systems shall not be otherwise 
enclosed unless necessary to protect the health and safety of persons 
employed at the mine. Where such systems are enclosed, they shall be 
located in separate fireproof structures of heavy construction with 
explosion pressure release devices (such as hinged wall panels, window 
sashes, or louvers); which provide at least 1 square foot of area for 
each 80 cubic feet of space volume and which are distributed as 
uniformly as possible throughout the structure.