{"data":{"id":"us/30-cfr-57.18020","jurisdiction":"us","citation":"30 CFR 57.18020","heading":"Working alone.","body":"No employee shall be assigned, or allowed, or be required to perform work alone in any area where hazardous conditions exist that would endanger his safety unless he can communicate with others, can be heard, or can be seen.","path":["Title 30—Mineral Resources","CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","SUBCHAPTER K—METAL AND NONMETAL MINE SAFETY AND HEALTH","PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES","Subpart Q—Safety Programs"],"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":"d4e8c0e9e37cb7d4103b8c0f4a6168fbc7df91a28d5c41a565da366440a07dd8","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-57.18014","next":"us/30-cfr-57.18025"},"notice":"GroundRules: Original legal text. Not legal advice."}