30 CFR Part 57Public Domain
§ 57.22223 — Crosscuts before abandonment (III mines)
Subpart T — Safety Standards for Methane in Metal and Nonmetal Mines
A means of ventilating faces shall be provided before workings are abandoned in unsealed areas, unless crosscuts are provided within 30 feet of the face.
Public Domain: 30 CFR Part 57 (MSHA Safety and Health Standards — Underground Metal and Nonmetal Mines) is a U.S. government publication and is not subject to copyright. Text extracted from the official source ↗. Figures are served from the eCFR; if one does not load, use the link in its place.