Section 3809.431 - When must I modify my plan of operations?You must modify your plan of operations when any of the following apply:
(a) Before making any changes to the operations described in your approved plan of operations;(b) When BLM requires you to do so to prevent unnecessary or undue degradation; and(c) Before final closure, to address impacts from unanticipated events or conditions or newly discovered circumstances or information, including the following:(1) Development of acid or toxic drainage;(2) Loss of surface springs or water supplies;(3) The need for long-term water treatment and site maintenance;(4) Repair of reclamation failures;(5) Plans for assuring the adequacy of containment structures and the integrity of closed waste units;(6) Providing for post-closure management; and(7) Eliminating hazards to public safety.