{"data":{"id":"us-va/4vac25-40-3990","jurisdiction":"us-va","citation":"4VAC25-40-3990","heading":"Self-rescue requirements","body":"Each mine having underground workings shall submit to the  division a plan for the number, type, and location(s) of self-rescue devices sufficient for the number of persons working underground and the hazards particular to the underground workings of the mine. At a minimum, a one hour filter self-rescue device approved by the MSHA shall be made available by the operator to all personnel underground. The filter self-rescue devices shall be maintained in  good condition by a daily visual check and weighing of the devices every six months, with maintenance records kept.","path":["Title 4. Conservation And Natural Resources","Agency 25. Department of Energy","Chapter 40. Safety and Health Regulations for Mineral Mining","Part XV. Safety and Health Regulations—Underground Only","Article 8. Personal Protection"],"source_url":"https://law.lis.virginia.gov/admincode/title4/agency25/chapter40/section3990/","current_through":"2026 Regular Session (effective July 1, 2026)","vintage":"","retrieved_at":"2026-09-14T04:46:07Z","sha256":"ece626cbb54b60817c7169a83476305203c9f3ec3de1bc9db0558dab0d085e62","source_id":"us-va-vac","stale":false,"prev":"us-va/4vac25-40-3980","next":"us-va/4vac25-40-4000"},"notice":"GroundRules: Original legal text. Not legal advice."}