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Grading Plan: <br />1. Topographic data, including contours at vertical intervals of not more than two feet, except that <br />where the horizontal contour interval is 100 feet or more, a one foot vertical interval shall be <br />shown. Watercourses, lakes wetlands, limits of flood plains and other significant physical features <br />shall be delineated. The ordinary high water elevation and 100-Year Flood Plain elevation shall be <br />identified. U.S.G.S datum survey shall be used for topographic mapping. <br />2. All high points and emergency overflow elevations shall be provided. <br />3. Soils data, including classification of all surface soils, in accordance with the Soil Conservation <br />Service Classification system and logs of borings sufficient in number and depth to establish the <br />elevation of the water table and soil types throughout the plat. <br />4. If the subdivision is to be serviced with on site systems, the soil types shall be identified. For each <br />lot having less than 30,000 square feet Class I soils, the location of a septic field and alternative field <br />must be identified. <br />5. Locations and invert elevations of storm sewers and drainage ditches and culverts within the plat <br />and to a distance of 100 feet beyond the plat. <br />6. Drainage area map of existing subdivisions showing the acreage of each drainage area (existing and <br />proposed) as well as providing the predevelopment and post development runoff rate, in cfs, for the <br />10 year and 100 year storm events. <br />7. Pre and post runoff calculations. <br />8. Size and type of each storm sewer facility proposed. <br />9. Proposed method of disposing of surface water drainage and method of conveying surface water <br />drainage within and beyond the limits of the plat to publicly owned or controlled drainage facilities <br />or storm sewers. There shall be no grades less than 1%. When grades are less than 2%, a certificate <br />of grading will be required prior to occupancy. The lots subject to this requirement should also be <br />noted on the final grading plan. <br />10. A development plan for each lot specifying house type, garage elevation, minimum floor elevation, <br />and lowest opening elevation. <br />11. A table specifying house type, garage elevation, minimum floor elevation, lowest opening elevation, <br />street centerline grade, 100-year flood elevation, and back yard and front yard slopes must be <br />provided. <br />12. Additional information as requested by the City. <br />Street Plan: <br />Development Review Manual (September 2011) <br />Plat/Subdivision Review <br />Page 11 of 45 <br />