4.6 PCSR 01-14-2014 - Laserfiche WebLink

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January 10,2014. Page 6 of 8 of the mine where it will be managed to promote infiltration. Erosion control practices include: (1) Routing on-site storm water flows to naturally occurring retention areas.(2)Creating channels to facilitate item number one. (3)Creating berms and other obstacles to facilitate item number one. The site has appropriate equipment and machinery to implement appropriate erosion control practices on an immediate and as-needed basis. Silt fencing will be used as needed for erosion and sediment control along perimeter areas that may temporarily drain off-site during stripping, overburden removal and berm construction. Where possible, a vegetative buffer of five to ten feet will be left intact between the silt fence and the mining area to provide initial filtering and sediment removal prior to runoff reaching the silt fence. (10)A comprehensive rehabilitation plan showing suitable provisions for rehabilitation of the excavated area to a useable condition compatible with the adjacent land such that it will not become a health or safety hazard or a nuisance. Such plan shall, at a minimum, include anticipated final elevations, slopes and plans for the return of vegetation, subsoil and topsoil.Where the council deems practical and necessary, such plan shall also include adjoining related areas where extractions have previously been made which remain under the control of the applicant or the owner of the land on which the extraction is proposed. Comment: The information is provided on pages 7 and 8, and the Reclamation Plan, C3 of the application. The requirement for Topsoil Preservation (Sec. 42-96) is not addressed. The Plan of Operation must identib,the volumes of soils required for reclamation and the future locations of soil stockpiles. Final slopes on the northern portion of the Site and the west property boundary of the southern parcel for McCrossan are indicated as 3:1 slopes, which exceed the required maximum of 4:1. This may be acceptable, however the thickness of topsoil will need to be increased and provisions for drainage/erosion control need to be addressed. Erosion control measures for slope areas where surface water runoff is concentrated must be identified. The reclamation plans require the backfilling of soil from the mining grade to the final contours. An earthwork balance assessment of soil volumes for reclamation must be provided by the applicant to insure that sufficient volumes of soil are maintained onsite to meet the reclamation earthwork needs. The Reclamation Plan indicates future potential roadways. The north-south frontage road in the southern portion of the Site indicates a grade as steep as 20%. The plan should be modified to accommodate a typical roadway grade. The Reclamation Plan does not indicate the specifics related to revegetation of the mined areas. Response: Topsoil for reclamation: All topsoil shall be retained onsite until completion of all reclamation work in accordance with the reclamation plan.