C.F.R. » Title 43 » CHAPTER II—BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR › SUBCHAPTER C—MINERALS MANAGEMENT (3000) › PART 3590—SOLID MINERALS (OTHER THAN COAL) EXPLORATION AND MINING OPERATIONS › Subpart 3595—Protection Against Mining Hazards

43 C.F.R. § 3595.2

Abandonment of underground workings

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No underground workings or part thereof shall be permanently abandoned and rendered inaccessible without the advance, written approval of the authorized officer.