U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 28, 2025

All TitlesTitle 30Chapter IPart 57Subpart T - Subpart T—Safety Standards for Methane in Metal and Nonmetal Mines
View all text of Subpart T [§ 57.22001 - § 57.22608]
§ 57.22203 - Main fan operation (I-C mines).

Main fans shall be operated continuously while ore production is in progress.

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