North Carolina General Statutes Chapter 136. Transportation § 136-102.2. Authorization required for test drilling or boring upon right-of-way;  filing record of results with Department of Transportation

No person, firm or corporation shall make any test drilling or boring upon the right-of-way of any transportation system, under the jurisdiction of the Department of Transportation, until written authorization has been obtained from the owner or the person in charge of the land on which the highway easement is located.  A complete record showing the results of the test drilling or boring shall be filed forthwith with the chairman [Secretary] of the Department of Transportation and shall be a public record.  This section shall not apply to the Department of Transportation making test drilling or boring for highway purposes only.