11E-517 Cuts, Fills, and Grading Improvements Proposed subdivisions shall

Cuts, Fills, and Grading Improvements Proposed subdivisions shall be carefully planned to be compatible with natural topography, soil conditions, geology and hydrology of the site, as well as to minimize cuts, fills, alterations of topography, streams, drainage channels, and disruption of soils and vegetation. The design criteria shall include the following: A. A preliminary soil report prepared by a qualified engineer may be required by the Commission and/or Council as part of the preliminary plat application. B. Preliminary grading plan prepared by a civil engineer shall be submitted as part of all preliminary plat applications. Said plan shall contain the following information: 1. Proposed contours at a maximum of five (5) foot contour intervals; 2. Cut and fill banks for building pad elevations; 3. Drainage patterns; 4. Areas where trees and/or natural vegetation will be preserved; 5. Location of all street and utility improvements including driveways to building envelopes. Any other information which may reasonably be required by the Commission, or Council to adequately review the affect of the proposed improvements. C. Grading shall be designed to blend with natural land forms and to minimize the necessity of padding or terracing of building sites, excavation for foundations, and minimize the necessity of cuts and fills for streets and driveways. D. Areas within a subdivision which are not well suited for development because of existing soil conditions, steepness of slope, geology or hydrology may be allocated for open space for the benefit of future property owners within the subdivision. E. Where existing soils and vegetation are disrupted by subdivision development, provision shall be made by the subdivider for re-vegetation of disturbed areas with perennial vegetation sufficient to stabilize the soil upon completion of the construction. Until such times as said re-vegetation has been installed and established, the subdivider shall maintain and protect all disturbed surfaces from erosion. F. Where cuts, fills, or other excavation are necessary, the following development standards shall apply: 1. Fill areas shall be prepared by removing all organic material detrimental to proper compaction for soil stability. 2. Fills shall be compacted to at least ninety-five (95) percent of maximum density as determined by AASHO T99 (Am. Assoc. State Highway Officials) and ASTM D698 (Am. Stnd. Testing Methods). 3. Cut slopes shall be no steeper than two horizontal feet to one vertical foot. Subsurface drainage shall be provided as necessary for stability. 4. Fill slopes shall be no steeper than two horizontal to one vertical. Neither cut nor fill slopes shall be located on natural slopes of three to one or steeper, or where fill slope toes out within twelve (12) feet horizontally of the top and existing or planned cut slope. 5. Toes of cut and fill slopes shall be set back from property boundaries a distance of three feet plus one-fifth of the height of the cut or the fill, but may not exceed a horizontal distance of ten (10) feet; tops and toes of cut and fill slopes shall be set back from structures at a distance of at least six feet plus one-fifth of the height of the cut or the fill. Cuts and slopes shall be re-vegetated as provided in Section N (5). Additional setback distances shall be provided as necessary to accommodate drainage features and drainage structures.