{"data":{"id":"us/30-cfr-77.212","jurisdiction":"us","citation":"30 CFR 77.212","heading":"Draw-off tunnel ventilation fans; installation.","body":"When fans are used to ventilate draw-off tunnels the fans shall be:\n(a) Installed on the surface;\n(b) Installed in fireproof housings and connected to the tunnel openings with fireproof air ducts; and,\n(c) Offset from the tunnel opening.","path":["Title 30—Mineral Resources","CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES","Subpart C—Surface Installations"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-30.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:25:24Z","sha256":"8b6d830e9558b3929343f7566be6e36a2c9b9d1f1ed7561aaf5587d364d91010","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-77.211-1","next":"us/30-cfr-77.213"},"notice":"GroundRules: Original legal text. Not legal advice."}