I am trying to do multiple grading side slopes on a pond project. I have all elevations set for the bottom. The deep portion is 2:1 side slopes and the shallower portion is 8:1. Civil asks for the entire length and I respond no, do the 2:1 no problems but it then asks for transitional length when I try to do the 8:1. Any suggestions or should I just do these as two seperate gradings??