Pasted Surfaces for Profile Labels
Use a Pasted Surface to Generate Corrected Profile View Labels
Jeff Bartels of Autodesk covers the basics of the Surface Edit Paste command - a way to combine surfaces in Civil 3D.
He employs the tool to create adjusted surface labels in the band style of a typical roadway that includes a bridge over the existing ground.
From the Jeff's YouTube Channel.
and the Civil Imersion blog.
The concepts covered here are very important for the creation of intermediate surfaces often employed in design in Civil 3D.
In other words sometimes it takes more than one surface to create and/or document your design in Civil 3D.
My only caution here is that you'd better carefully manage where all these interactive surfaces are stored in your project.
In Jeff's quick and dirty example the working drawing is the publishing drawing. This can drive you crazy as things get more complicated.