Oklahoma Administrative Code
Title 460 - Department of Mines
Chapter 20 - The Permanent Regulations Governing the Coal Reclamation Act of 1979
Subchapter 43 - Permanent Program Performance Standards: Surface Mining Standards
Section 460:20-43-36 - Slides and other damage

(a) An undisturbed natural barrier shall be provided beginning at the elevation of the lowest coal seam to be mined and extending from the out slope for such distance as may be determined by the Department as is needed to assure stability. The barrier shall be retained in place to prevent slides and erosion.

(b) At any time a slide occurs which may have a potential adverse affect on public property, health, safety, or the environment, the person who conducts the surface mining activities shall notify the Department by the fastest available means and comply with any remedial measures required by the Department.