Calculate Topsoil Volumes with Place Lined Material
Autodesk's Jeff Bartels covers how to employ Structural Materials calculations with Daylight subassembly Place Lined Material options for Civil 3D.
In other words - how to calculate slope controlled volumes of Daylight materials in Corridors.
See the Jeff Bartels YouTube Channel.
and the Civil Immersion blog.
Jeff covers an advanced Volumes method that is native to the Place Lined Material options available in the Civil 3D stock Daylight subassemblies in detail.