Code of Federal Regulations Title 43. Public Lands:  Interior § 43.3598.1 Inspection of underground and surface conditions;  surveying, estimating and study

Operators/lessees shall provide means at all reasonable hours, either day or night, for the authorized officer to inspect or investigate the underground and surface conditions;  to conduct surveys;  to estimate the amount of ore or other methods of prospecting, exploration, testing, development, processing and handling;  to determine the volumes, types, and composition of wastes generated;  to determine the adequacy of measures for minimizing the amount of such wastes and the measures for treatment and disposal of such wastes;  to determine reclamation procedures and progress;  production records;  environmental concerns;  and to determine whether the operator/lessee is in compliance with established requirements.