1113.05 GRADING PLAN CONTOUR LINES.
   The grading plan shall show contour lines at five-foot intervals where average slopes exceed ten percent and at two-foot intervals where the average slope is less then ten percent. Elevations are to be based on sea level datum (USGS), if available. Datum for contours shall be indicated on the map.
(Ord. 45-67. Passed 8-7-67.)