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5 <br /> Wee <br /> Storm DrainAge Facilities - the system of inlets, conduits, <br /> channels, ditches, and appurtenances which serve to collect and <br /> convey stormwater through and from a given drainage area. <br /> Storm Water Runoff - means the direct runoff of water resulting <br /> from precipitation in any form. <br /> Stream - a body of water flowing in a natural surface channel. <br /> Flow may be continuous or only during wet periods. <br /> Swale - an elongated depression in the land surface that is at <br /> least seasonally wet, is usually heavily vegetated, and is <br /> normally without flowing water. Swabs conduct stormwater into <br /> primary drainage channels and provide some groundwater recharge. <br /> Ten Year Storm - means the surface runoff resulting from a <br /> rainfall of an intensity expected to be equaled or exceeded, on <br /> the average once in 10 years, and of a duration which will <br /> produce the maximum peak rate of runoff for the watershed of <br /> interest under average antecedent wetness conditions. <br /> Tract - means all contiguous land and bodies of water in one <br /> ownership, or contiguous land and bodies of water in diverse <br /> ownership being developed as a unit, although not necessarily all <br /> at one time. <br /> Uncovered - means the removal of ground cover from, on, or above <br /> the sail surface. <br /> Undertaken - means the initiating of any activity, or phase of <br /> activity, which results or will result in a change in the ground <br /> cover or topography of a tract of land. <br /> Velocity - means the average velocity of flow through the <br /> cross-section of the main channel at the peak flow of the storm <br /> of interest. The cross-section of the main channel shall be that <br /> area defined by the geometry of the channel plus the area of the <br /> flow below the flood height defined by vertical lines at the main <br /> channel banks. Overload flows are not being included for the <br /> purpose of computing velocity of flow. <br /> Waste - means surplus materials resulting from on-site construc- <br /> tion and disposed of at other locations. <br /> Wetland - areas that are inundated or saturated at a frequency <br /> and for a duration sufficient to support a prevalence of vegeta- <br /> tive or aquatic life requiring saturated or seasonally saturated <br /> soil conditions for growth and reproduction. <br /> Workingdays - means days exclusive of Saturday and Sunday during <br /> which weather conditions or soil conditions permit <br /> land-disturbing activity to be undertaken. <br />