{"data":{"id":"us/43-cfr-3809.431","jurisdiction":"us","citation":"43 CFR 3809.431","heading":"When must I modify my plan of operations?","body":"You must modify your plan of operations when any of the following apply:\n(a) Before making any changes to the operations described in your approved plan of operations;\n(b) When BLM requires you to do so to prevent unnecessary or undue degradation; and\n(c) Before final closure, to address impacts from unanticipated events or conditions or newly discovered circumstances or information, including the following:\n(1) Development of acid or toxic drainage;\n(2) Loss of surface springs or water supplies;\n(3) The need for long-term water treatment and site maintenance;\n(4) Repair of reclamation failures;\n(5) Plans for assuring the adequacy of containment structures and the integrity of closed waste units;\n(6) Providing for post-closure management; and (7) Eliminating hazards to public safety.","path":["Title 43—Public Lands: Interior","Subtitle B—Regulations Relating to Public Lands","CHAPTER II—BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR","SUBCHAPTER C—MINERALS MANAGEMENT (3000)","PART 3800—MINING CLAIMS UNDER THE GENERAL MINING LAWS","Subpart 3809—Surface Management"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-43.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:15Z","sha256":"903cc43753d6907d031b034106258d5e1dc98ee700ae7fc9a858a083a4ff1d19","source_id":"us-cfr","stale":true,"prev":"us/43-cfr-3809.430","next":"us/43-cfr-3809.432"},"notice":"GroundRules: Original legal text. Not legal advice."}