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. . . C. Tilling, planting, or harvesting of agricultural, horticultural, or silvicultural (forestry) crops. D. Emergency work to protect life, limb, or property and emergency repairs, unless the Land Disturbing Activity would have otherwise required an approved erosion and sediment control plans, except for the emergency. If such a plan would have been required, then the disturbed land area shall be shaped and stabilized in accordance with the city's requirements as soon as possible. Native Vegetation means the presetdement group of plant species native to the local region, that were not introduced as a result of European setdement or subsequent human introduction. Ordinary High Water Mark means the boundary elevation where the vegetation changes from predominately aquatic (Where "aquatic" broadly means that the vegetation can survive moist conditions.) to terrestrial. This elevation delineates the highest water level, which has been maintained for a sufficient period of time to leave evidence upon the landscape, commonly that point where the natural vegetation changes from predominandy aquatic to predominandy terrestrial. Water often reaches this elevation in spring. For rivers and streams the ordinary high water mark is usually the top of the bank. It is less well defined for lakes and wedands. The definition in Minnesota Statute 103G.005, subdivision 14 says that the" . . . "Ordinary high water level" means the boundary of waterbasins, watercourses, public waters, and public waters wedands, and: 1. the ordinary high water level is an elevation delineating the highest water level that has been maintained for a sufficient period of time to leave evidence upon the landscape, commonly the point where the natural vegetation changes from predominandy aquatic to predominandy terrestrial; 2. for watercourses, the ordinary high water level is the elevation of the top of the bank of the channel; and 3. for reservoirs and flowages, the ordinary high water level is the operating elevation of the normal summer pool. The term "ordinary high water mark" is further defined in Minnesota Rule 6120.2500, subpart 11. The Minnesota Department of Natural Resources' area hydrologist determines ordinary high water marks. Paved Surface means a constructed hard, smooth surface made of asphalt, concrete or other pavement material. Examples include, but are not limited to, roads, sidewalks, driveways and parking lots. Permanent Cover means "final stabilization." Examples include grass, gravel, asphalt, and concrete. See also the definition of "final stabilization." Receiving waters means the water where the discharge goes 4