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Final Grading Plan <br /> <br /> 1. Topographic data, including contours at <br /> <br /> 9.50.04 <br />vertical inter-v'als of ........... <br /> <br />than two feet, except that where the horizontal contour inte~wal is 100 <br />feet or more, a one foot vertical interval shall be shown. Water courses, <br /> <br />lakes wetlands, limits of flood plains and other-significant physical <br />features shall be delineated. The ordinary hieh water elevation and 100 <br /> <br />· fear Flood Plain elevation shall be identified. U.S.G.S datum survey · <br /> <br />shall be used for top0~aphic mapping. <br /> <br />2. Soils data, including' classification of all surface soils, in accordance <br /> with the Soil Consetwation Ser¥ice Classification system and los of <br /> <br />¸3. <br /> <br /> borings sufficient in number and depth to establish the elevation of the <br />· -water table and soil ~pes throughout the plat: " <br /> If the subdivision is to be serviced width on site systems, the soil twpes <br /> shall be identified. For each lot having less than 25% Class I soils, the <br /> location of a septic field and alternative field must be identified. <br /> <br />4. L. ocatiOns and invert elevations of storm sewers and drainat~e ditches <br /> <br />and culverts within the plat and to a distance of 100 feet bevond the plat. <br /> <br />Drainage area map of exiSting subdivisions showing the acreage of each <br />drainage area (existing and proposed) as well as providing the <br />predevelopment and post development runoff rate. in cfs, for the 10 year <br />and 1'00 year storm events. <br /> <br />6. Pre and post'runoff calculations. <br /> <br />7. Size and type of each storm sewer faciliw proposed. <br /> <br />8. Proposed method of Convevimz Surface water drainage within and <br /> <br />beyond the limits of the plat to publicly owned or controlled drainage <br />facilities or storm sewers. <br /> <br />Lots with ~rades flatter than 2% must provide a certificate of grading <br />prior to issuance of the Certificate of occupancy. The lots subject to tltis <br />requirement should be noted. <br /> <br />10. Lot corner elevations as well as drainage swale centerline .grades at <br /> intersections of lot lines. <br /> <br />1'1. Drainage and utility easements <br /> <br />12. Direction of flow arrows in and around house pads. <br /> <br />9.50 Subdivision Regulations <br /> <br />9-21 <br /> <br />March 2003 Draft <br /> <br />61 <br /> <br /> <br />