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F. Grading. <br /> Grading shall refer to any excavation (Section 18.70.040D.) or fill (Section <br /> 18.70.040E.) or combination thereof on property by artificial means to alter natural <br /> features including slopes and contours. For the purpose of this chapter, grading shall not <br /> include exploratory excavations, such as geotechnical or archaeological work, conducted <br /> under the direction of a qualified professional, repair or replacement of underground <br /> utilities. <br /> G. Ridge and Ridgeline. <br /> A ridge is a landform created by a series of hills. A ridgeline is a continuous <br /> ground line connecting the highest elevations of a ridge. The end of the ridgeline shall be <br /> the last peak on each end of the landform at which the elevation of the ridgeline no longer <br /> rises in elevation, and only decreases in elevation. <br /> Figure 2, below, illustrates the ridgeline definition. <br /> End Peak End Peak <br /> Ridgeline Ends Ridgeline Ends <br /> \I \I <br /> Landforrn No longer Increases in <br /> Elevation beyond End Peaks <br /> Figure 2: Ridgeline <br /> H. Slope (Grade). <br /> Slope, also referred to as grade, is the ratio of height (rise) over distance (run) for <br /> a segment of land, where a vertical line would have an infinite slope. For example, a <br /> vertical rise of one foot over a horizontal run of one foot has a slope of 100-percent. The <br /> 25-percent slope standard used in this chapter is, therefore, the ratio of a one-foot rise <br /> over a four-foot run, i.e., 25 percent. Slopes are typically measured between adjacent <br /> contour lines and perpendicular to the contour lines. <br /> 6 <br />