(A) (1) All areas directly affected by mining shall be addressed in the approved reclamation plan to provide that a stable and safe condition consistent with the post-mining land use is achieved. The reclamation plan may designate high walls or other unmined and undisturbed natural solid bedrock as stable and safe and not in need of reclamation or designate other areas affected by mining including slopes comprised of unconsolidated materials that exceed a three to one (3:1) slope, whether or not graded, as stable and safe. For slopes designated as stable under this section, the city may require that a site-specific engineering analysis be performed by a registered professional engineer to demonstrate that an acceptable slope stability factor is attainable at a steeper slope.
(2) Final reclaimed slopes covered by topsoil or topsoil substitute material may not be steeper than a four to one (4:1) horizontal to vertical incline, unless recommended by on site-specific engineering analysis performed by a registered professional engineer. All areas in the extraction pit site where topsoil or topsoil substitute material is to be reapplied shall be graded or otherwise prepared prior to topsoil or topsoil substitute material redistribution to provide the optimum adherence between the topsoil or topsoil substitute material and the underlying material.
(B) If the approved post-mining land use includes a body of water, the approved final grade at the edge of a body of water shall be a slope no steeper than six to one (6:1).
(Prior Code, § 345.07)