Rule 1501:14-3-07. Final highwalls

119.03 To insure public safety when highwalls are retained as part of the intended future use, the operator shall: (A) Design the procedures to detonate explosives in a manner that the final highwall will not be fractured to an unstable condition; (B) Stabilize any unstable final highwalls; (1) Lime mining waste used to backfill highwalls. An angle of eighteen degrees or less, in accordance with paragraph (A) of rule 1501:14-3-06 of the Administrative Code, from the top of the highwall to the quarry floor shall be deemedis acceptable with a minimum of four feet of non-toxic earthen material covering the submerged slope, with an additional six inches of topsoil used to cap any exposed slope, then planted to a diverse vegetative cover in accordance with Chapter 1501:14-3 of the Administrative Code. An alternative plan for cover or treatment may be approved by the chief based upon a showing by the applicant that, at a minimum, the alternative plan is as effective as four feet of cover for protecting water quality and sustaining vegetative growth. (C) Provide egress from the pit area; (D) Restrict access to the highwall as approached from the top; and (E) Perform other measures as are necessary to insure public safety because of the particular site conditions. Last updated June 25, 2025 at 6:33 PM Supplemental Information Authorized By: 1514.08 , 1514.081 , 1514.12 Amplifies: 1514.011 , 1514.02 , 1514.081 , 1514.12 2/1/2029 8/1/2005