{"data":{"id":"us/30-cfr-77.309","jurisdiction":"us","citation":"30 CFR 77.309","heading":"Visual check of system equipment.","body":"Frequent visual checks shall be made by the operator of the thermal dryer system control station, or by some other competent person, of the bypass dampers, air-tempering louvers, discharge mechanism, and other dryer system equipment.","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 D—Thermal Dryers"],"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":"81bc0d214101cc326bcbaa3ce67e686e37c2a469529552a69a89efe16aadc0a2","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-77.308","next":"us/30-cfr-77.309-1"},"notice":"GroundRules: Original legal text. Not legal advice."}