1501:14-3-07 Highwalls.

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 18 degrees in accordance with 1501:14-3-06 (A) from the top of the highwall to the quarry floor shall be deemed acceptable with a minimum of four feet of non-toxic earthen material covering the submerged slope, with an additional six (6) inches of topsoil used to cap any exposed slope, then planted to a diverse vegetative cover in accordance with this Chapter. 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.

Effective: 08/01/2005

R.C. 119.032 review dates: 10/04/2007

Promulgated Under: 119.03

Statutory Authority: 1514.08, 1514.081

Rule Amplifies: 1514.02

Prior Effective Dates: 3/24/75, 10/4/02