30 CFR 817.131 - What actions must I take when I temporarily cease mining operations?
(1) Each person who temporarily ceases to conduct underground mining activities at a particular site must effectively support and maintain all surface access openings to underground operations and secure surface facilities in areas in which there are no current operations, but where operations are to be resumed under an approved permit.
(1) You must submit a notice of intent to temporarily cease operations to the regulatory authority before ceasing mining and reclamation operations for 30 or more days, or as soon as you know that a temporary cessation will extend beyond 30 days.
(2) The notice of temporary cessation must include a statement of the -
(i) Exact number of surface acres disturbed within the permit area prior to temporary cessation;
(ii) Extent and kind of reclamation accomplished before temporary cessation; and
(iii) Backfilling, regrading, revegetation, environmental monitoring, underground opening closures, and water treatment activities that will continue during temporary cessation.