Extract boundaries From Cut & Fill Volume Features - Power InRoads SS3/SS4

I used the Terrain Model > Create Cut & Fill Features tool to create cut & fill features.  We get two mesh objects (one for cut and one for fill).  Is there any way to extract the boundary for each individually?  I have using tried the mesh tools to extract boundaries but all I get is a series of random lines.  I have not been able to find any tools that allow me to extract mesh boundaries or even merging the shapes to get a contiguous boundary.

Is there a straightforward way to extract boundaries from these cut & fill features?