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30 CFR 57.22211

§ 57.22211 Air flow (I-A mines).

United States · 30 CFR — Mineral Resources · Status: effective

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30 CFR 57.22211, § 57.22211 Air flow (I-A mines), United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/133237
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Full text

The average air velocity in the last open crosscut in pairs or sets of developing entries, or through other ventilation openings nearest the face, shall be at least 40 feet per minute. The velocity of air ventilating each face at a work place shall be at least 20 feet per minute.

Legislative history

This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.