Any reclamation provided for in § 45-6-67 shall be carried to completion by the operator with all reasonable diligence, and final reclamation shall be completed within three years after all mining under the license has ceased operation, unless such period is extended by the Board of Minerals and Environment upon a finding that additional time is necessary for the completion of final reclamation of all licensed sites. Failure to complete final reclamation within three years after all mining under the license has ceased may result in the forfeiture of the surety.
SDCL 45-6-67.1