Next was to add the breaklines for the contour banks. Breaklines were added in the Existing Topography following the survey points closely and these breaklines were then moved to the Proposed Topography. The breakline elevations were then optimized using the OptiLine parameters shown.
Then, the breakline was offset to create a wide flat surface so the machine control file will pick up the points. The operator will use the centerline to cut the channel base and then use vertical and horizontal offsets to batter up the side slopes to the required height (E.g. 700mm for banks).
Lastly, the Cut/Fill Map was recalculated to show the estimated earthworks and update the cuts and fills in the map.