Civil 3d 2010 - Corridor Problem

[rplese]

I am given a Feature line for a curb.  From that I create a polyline at 0 elevation, an alignment and a profile. When I go to create a corridor, at the corners (which are made of many short line segments) the corridor drops to the 0' elevation.  There is only one region and one assembly in the corridor and it should be daylighting on the OG surface.  Note: There is enough surface to catch the daylight if it were drawen at elevation. 

Do I need to redo the alignment?

[mathewkol]

It sounds like you've assigned an elevation target to your corridor using that 0-elevation polyline.

[AlmasSuljevic · Accepted solution]

rplese,

I agree with Matt and think that is the reason for this issue. Generally, in many cases the drop is due to the surface profiles or alignment having elevation of 0 (maximum or minimum). You want to make sure you target correct surface and profile. Also a drop in a corridor to zero could mean that your baseline alignment and profile are not the same lengths.

[rplese]

Thanks guys, the surface works now.