I have asked this question a couple different times without an efficient response as of yet. I get my bore holes and define my strata. I build my sites and input my site improvements. However, excavation is never directly vertical. How can I define my excavated areas to return original ground at a degree or ratio of slope so that I can get the accurate quantities? A corridor or utility approach do not make sense as these are for large commercial sites that have excavation over 20' below existing grade, then filling up to bottom of foundations. These buildings are not perfect squares or rectangles. It would seem fairly simple to create a side slope feature for over-excavation or site improvements.