01-14-2014 PC MIN - Laserfiche WebLink

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Planning Commission Minutes Page 10 January 14,2014 I) The applicant must provide a more detailed plan which identifies the 1111 placement of control measures for water runoff and sediment erosion for all areas which do not drain to the interior settling ponds. This must include description of control measures and locations where they are placed. Appropriate control measures are temporary vegetative seeding, mulch, buffer zones, earthen dikes, drainage swales, sediment traps, riprap, sediment basins and silt fencing. g) The requirement for Topsoil Preservation (Sec. 42-96) is not addressed. The Plan of Operation must identify the volumes of soils required for reclamation and the future locations of soil stockpiles. h) 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. i) The reclamation plans requires 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. j) 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 must be modified to accommodate a typical roadway grade. k) The Reclamation Plan must indicate the locations and plantings for the revegetation of the mined areas. 1) Mining which occurs in the vicinity of the wetland will decrease the drainage area for the wetland, as proposed. There is a potential that the hydraulic characteristics of the wetland will be changed resulting in a change in the related biological conditions. These potential impacts to the wetland must be addressed in accordance with the Minnesota Wetland Conservation Act (WCA). m) The applicant shall be responsible for the cost and construction of all road improvements,including turn lanes, as required by the Township, Sherburne County or MnDot.The city reserves the right to require the applicant to pay for road maintenance of haul routes. n) Dust control is required for all roads and within the site,when it is determined that dust is creating a public nuisance or otherwise adversely affecting adjacent properties. o) All activities on the site shall be conducted in a manner that is consistent with operating permits issued by the city, county, state, federal and other agencies. A copy of any and all permits related to the operation of the site shall be submitted to the city for their reference. p) Vehicles and equipment not in operable condition or materials not • associated with the mineral extraction/excavation activity shall not be kept or stored at the site.