312 IAC 11.5-2-8 "Significant environmental harm" defined

Sec. 8. "Significant environmental harm" means damage to natural or cultural resources, the individual or cumulative effect of which is found by the director to be obvious and measurable (based upon the opinion of a professional qualified to assess the damage) and that: (1) creates a condition where recovery of affected resources is not likely to occur within an acceptable period; and (2) cannot be adequately mitigated through the implementation of a mitigation plan approved by the director.