Ind. Code § 14-34-3-4

Sec. 4. The information required by section 3 of this chapter pertaining to coal seams, test borings, core samplings, or soil samples is available for inspection by any person with an interest that is or may be adversely affected by the surface coal mining and reclamation operation. However, the information that pertains only to the analysis of the chemical and physical properties of the coal, except information concerning a mineral or elemental content that is potentially toxic in the environment and the nature and location of archeological resources on public land and Indian land as required under the federal Archeological Resources Protection Act of 1979 (16 U.S.C. 470aa et seq.), is confidential.