Corridor - Strip Top Soil Under Corridor

[Plheureux]

Is there a way to setup it up so that topsoil is automatically stripped under a corridor? I tried using surface strata and this works fine in a cut section but in a fill section it is leaving the topsoil which we would need to remove.

I am hesitant to using stripping boundaries because if we raise/lower the road we have to keep updating our boundary.

[Erik_Petersen]

You have to tie your catch points to the surface vertically, or continue your slope to tie to it.

[Plheureux]

[Plheureux]

In this case I was able to accomplish this using the surface instruction a vertical offset. I think in some cases with conditional statements, getting the surface extents could be tricky. There needs to be a way to limit the extents based on the extents of the design surface.

[Gavin_Jones]

Corridor Strata Surface

You have to make it as a subgrade using a surface instruction. It has to be 100% below Finished Grade so if it extends beyond the Finished Grade surface you need to extend the Finished Grade to include some of the existing surface (use surface instruction with node to node offsets to add to finished grade surface - I sent you an example project on how to do this earlier - I will record a video for you on this today Alan

[Plheureux]

Thanks @Gavin_Jones. This is close to how I approached this. It would be nice if you could limit the surface instruction based on instruction with a corridor reference surface.