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poultry and/or livestock. <br /> <br />"Best Management Practices" or "BMPs" means a practice, or a <br />combination of practices, that is determined by a state or <br />designated area-wide planning agency to be the most effective, <br />practical means of preventing or reducing the amount of pollution <br />generated by nonpoint sources to a level compatible with water <br />quality goals. <br /> <br />"Buffer area" means an area of natural or established vegetation <br />managed to protect other components of a Resource Protection Area <br />and state waters from significant degradation due to land <br />disturbances. <br /> <br />"Chesapeake Bay Preservation Area" or "CBPA" means any land <br />designated by the City Council pursuant to Part III of the <br />Chesapeake Bay Preservation Area Designation and Management <br />Regulations, VR 173-02-01, and Section 10.1-2107 of the Code of <br />Virginia. A Chesapeake Bay Preservation Area shall consist of a <br />Resource Protection Area and a Resource Management Area. <br /> <br />"Construction footprint" means the area of all impervious surface <br />including, but not limited to, buildings, roads and drives, <br />parking areas, and sidewalks and the area necessary for <br />construction of such improvements. <br /> <br />"Development" means the construction, or substantial alteration, <br />of residential, commercial, industrial, institutional, <br />recreation, transportation, or utility facilities or structures. <br /> <br />"Diameter at breast height" or "'DBH" means the diameter of a tree <br />measured outside the bark at a point 4.5 feet above ground. <br /> <br />"Dripline" means a vertical projection to the ground surface from <br />the furthest lateral extent of a tree's leaf canopy. <br /> <br />"Impervious cover" means a surface composed of any material that <br />significantly impedes or prevents natural infiltration of water <br />into the soil. Impervious surfaces include, but are not limited <br />to: roofs, buildings, streets, parking areas, and any concrete, <br />asphalt, or compacted gravel surface. <br /> <br />"Intensely Developed Areas" or "IDAs" means a portion of a <br />Resource Protection Area or a Resource Management Area designated <br />by the City Council where development is concentrated and little <br /> <br /> <br />