Bridge Grading around End's of Abutments?

Good Afternoon Bridge Experts, 

Here at my organization internal bridge design is rather simple, we don’t design anything big or complicated mostly single span with concrete or steel beams.  And when we have created designs the approach has been for the deliverable to be a paper plan set, now migrating to ORD (eventually OBD) it will a 3D model.  So we are starting the transition of getting our minds around a 3D model-centric deliverable.  We believe the construction of a bridge 3D model will be for the most part fairly straight forward due to the simplicity of the designs we have been dealing with.  Except, for the area of transition from where the approach grading (roadway) ends at the back of the abutment and raps around the wingwall to where it matches with the grading at the front face of the abutment.  I don’t know what the correct engineering term for this area is but the Bridge CADD Technicians call this “the cone”.  What is the correct term by the way?  The area we call the “cone” is depicted in red as shown below.

Now the above illustration is way simplified, but I was just using this dgn file as a test bed for ideas.  I am no expert in either Bridge design or ORD but I can see various ways to try and model this area but I don’t know which is the best approach.  I know darn sure I’m not the first to find this area of bridge design irksome.  That is why I’m posing this question to you the experts, “What approach using just ORD tools (because we are just in the beginning of its migration and we are not going to OBD right off) to creating a ‘clean and neat’ 3D model of this area (red area)?” 

I can see using the following techniques, below these techniques are the pros and cons that I can come up with:

1. 3D solid tools (like I did in this dgn) where the level used in creating the “cone” is the same as the finish grading either side of it.  I just set the level, created a triangular profile and extruded it around an axis.  Once all the terrain elements are complete I can just make it all one mesh (I believe that is way it needs to be finished up).
   1. Pro – fairly easy to create
   2. Con – a bit of an effort to finish and clean up the ‘finish grade’ terrain
2. Create a 3D cell of the “cone” with it’s origin point being the origin point of the cone, and orientated so that origin point would be at the top.  The cell’s symbology would be setup like the 3D solid above and so would be the design’s finishing touches.
   1. Pro – fairly easy to create
   2. Con – a bit of an effort to finish and clean up the ‘finish grade’ terrain
3. Wrap an alignment around all sides of the abutment except for the back which the approach grading covers.  Then drop various Roadway Designer Templates along this alignment which would completely tie in the grading from one side of the abutment to the other.
   1. Pro – The tools are the same to the ones used in the approach (roadway) 3D design.
   2. Pro – There is much less ‘finishing touches’ to be done to the terrain with this approach.
   3. Con – The construction of the alignment could be complicated, and the use of end conditions to create the “cone” will be.
4. Civil Cells of just the “cone” areas, similar to proposed option 1 & 2 but this the lease familiar technique that I could come up with since I’ve never used a Civil Cell before.
   1. Pro – Not sure what they are, not having uses these before.
   2. Con – Unfamiliar.
5. Any other options that didn’t come to me that are better? 

Can any of you suggest which path to take, or a better workflow entirely? 

Thank You Again for your time and enjoy the weekend,