during some of our recent lectures with David, we had to create a new landform from an old existing Quarry in Norther england. we had to put 25% of the soil that was extracted from the site back onto the site in decent manner. although that sounds easy it was very fiddly with having to add, move contours on Auto Cad. however the outcome qas rather good. to the right is one of my visuals of my design. and below is where i have been playing with sketchup.