{"data":{"id":"us/30-cfr-77.302","jurisdiction":"us","citation":"30 CFR 77.302","heading":"Bypass stacks.","body":"Thermal dryer systems shall include a bypass stack, relief stack or individual discharge stack provided with automatic venting which will permit gases from the dryer heating unit to bypass the heating chamber and vent to the outside atmosphere during any shutdown operation.","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":"a56dd07864da628717161deb09fa49be7fbb3f58565650654b37737d4fec0a4e","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-77.301","next":"us/30-cfr-77.303"},"notice":"GroundRules: Original legal text. Not legal advice."}