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30 CFR 57.22216

§ 57.22216 Separation of intake and return air (I-C mines).

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

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30 CFR 57.22216, § 57.22216 Separation of intake and return air (I-C mines), United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/133242
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The main intake and return air currents in single shafts shall be separated by ventilation tubing, curtain walls, or partitions. Ventilation tubing shall be constructed of noncombustible material. Curtain walls or partitions shall be constructed of reinforced concrete or other noncombustible equivalent, and provided with pressure-relief devices.

Legislative history

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