9-102.120 - DETERMINING NATURAL SLOPE

Natural slope, meaning the slope of the ground prior to any soil disturbance, shall be determined by measuring the horizontal distance between adjacent contours on a United State Geologic Survey (USGS) 7.5 minute quadrangle map or other topographic map acceptable to the Zoning Administrator with a scale of not less than 1:24000 (one inch = 2,000 feet) and contour intervals of not more than 20 feet, and then dividing the difference in elevation between the two contours by the measured horizontal distance. The horizontal distance shall be measured perpendicular to the contours.