The cross-section of the ground is level at Station 39+00 and has an elevation of 213.60 ft. According to grading plans the contractor must bring the grade at the centerline to an elevation of 219.80 ft. In addition, the top graded surface is to have a 2% grade falling away from the centerline on each side for a distance of 13.00 ft, followed by 9.00 feet graded with a 3% slope away from the centerline. At that point, a 5 to 1 fore slope must be constructed down to the ground line. The distance from the centerline to the toe of the slope would be:

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elev. = 219.80¹ elev. = 213.60' elev. = 219.80¹ elev. = 213.60'

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Cross section of the ground is level at Station 390... View the full answer