Subassembly with lots of conditional formats

[WardE01]

I am trying to come up with the best way to model rip-rap apron around a sheet pile bulkhead supporting a bridge. Coworkers and I have brainstormed either trying to use feature lines (which hasn't been optimal) or to use an assembly and make a faux-alignment. The attached images are of the sheet pile bulkhead, which is essentially an oval, and the dimensions for the riprap lining which would ideally be keyed in below the existing ground surface. The surface we are grading to has quite a bit of variation. The riprap typical is in the two png files, Note 6 is "Dimensions vary as the riprap apron slopes both parallel and perpendicular to the centerline of the track."

So might be a bit of a high hope, and maybe it would be done better as a graphic with assumed quantities and generous contingency. Thanks for any help and thoughts!

[ecfernandez]

Hi @WardE01, welcome to the Autodesk Civil 3D forums. I read your post and could not understand the specific question or problem you would like to receive ideas about. Could you please be more specific? This will help us think of possible solutions to what you are looking for.

Best regards! 

[Neilw_05]

This could be done in 2 parts.

1. create an assembly for the bottom of rip rap and run it around the bulkhead. This gets you a bottom surface and tie in to existing.

2. run a second assembly for top rip rap and use the tie in from 1. for the extents for the top rip rap surface.

Compute volumes between the 2 surfaces for rip rap.