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title 30
Mineral Resources
chapter I
CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
part 57
PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES
subpart B
Subpart B—Ground Control
subjgrp 144
Precautions—Surface and Underground
Subjgrp 144. Precautions—Surface and Underground
§ 57.3400 - Secondary breakage.
§ 57.3401 - Examination of ground conditions.
