25 Pa. Code § 106.61
The Department may, if it finds there is reasonable cause to suspect the existence of conditions which could cause floodwaters or materials carried by floodwaters to endanger or cause damages to people or property, order the owner to conduct such investigations, studies, tests and analyses as may be required to properly evaluate the safety of the structure. Such investigations, studies, tests and analyses shall be accomplished under the supervision of a registered professional engineer or other licensed professional as may be appropriate, experienced in the design, construction, operation and maintenance of such facilities and approved by the Department, and shall be accomplished in accordance with such methods and within the time limits as the Department may prescribe. Failure to provide such investigative results to the Department on request will constitute adequate grounds for revocation or suspension of a permit.
25 Pa. Code § 106.61