Land rehabilitation plans for mineral extraction permits must include the grading plans, topsoil replacement, seeding, mulching, erosion control, and sedimentation control specifications for each phase and the final site restoration. The following minimum standards and conditions apply.
(A) Final grades may not exceed a 3:1 ratio (33% slope), except for rehabilitated areas in existence at the time of adoption of this chapter. In completing final grading in each phase, the top of the slope may begin 20 feet from property lines.
(B) A minimum of six inches of topsoil shall be placed on all graded surfaces.
(C) Seeding and mulching shall be consistent with Minnesota Department of Transportation specifications for rights-of-way. Exceptions to seeding and mulching include areas returned to agricultural production.
(D) Soil restoration, seeding, and mulching must occur within each phase as soon as final grades, or interim grades identified in the phasing plans have been reached. Exceptions to seeding and mulching include the processing, storage and staging areas within each phase.
(E) Soil erosion and sedimentation control measures shall be consistent with MPCA's Protecting Water Quality in Urban Areas.
(F) Unless otherwise amended or approved by the city, all final grades and site restoration efforts shall be consistent with the rehabilitation plan.
(G) Within six months after completion of mineral extraction or after termination of the permit, all equipment, vehicles, machinery, materials and debris shall be removed from the subject property.
(H) Within 12 months after completion of mineral extraction or after termination of the permit, site rehabilitation must be completed.
(I) All water areas resulting from excavating shall be eliminated upon rehabilitation of the site. In unique instances where the City Council has reviewed proposals for water bodies at the time of approval of the overall plan and has determined that such would be appropriate as an open space or recreational amenity in subsequent reuse of the site, water bodies may be permitted.
(Ord. 2015-02, passed 6-8-2015)