{"data":{"id":"us/30-cfr-50.40","jurisdiction":"us","citation":"30 CFR 50.40","heading":"Maintenance of records.","body":"(a) Each operator of a mine shall maintain a copy of each investigation report required to be prepared under § 50.11 at the mine office closest to the mine for five years after the concurrence.\n(b) Each operator shall maintain a copy of each report submitted under § 50.20 or § 50.30 at the mine office closest to the mine for five years after submission. Upon request by the Mine Safety and Health Administration, an operator shall make a copy of any report submitted under § 50.20 or § 50.30 available to MSHA for inspection or copying.","path":["Title 30—Mineral Resources","CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","SUBCHAPTER I—ACCIDENTS, INJURIES, ILLNESSES, EMPLOYMENT, AND PRODUCTION IN MINES","PART 50—NOTIFICATION, INVESTIGATION, REPORTS AND RECORDS OF ACCIDENTS, INJURIES, ILLNESSES, EMPLOYMENT, AND COAL PRODUCTION IN MINES","Subpart E—Maintenance of Records; Verification of Information"],"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":"299d3d67b26c332b687e1c126b99c8c808429fc9ab02792c923076f5d8aac6ff","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-50.30-1","next":"us/30-cfr-50.41"},"notice":"GroundRules: Original legal text. Not legal advice."}