Civil Cell Reference lines

Hi,

Using Power InRoads V8i (SS4) 08.11.09.904

Two issues here:

I'm attempting to place a civil cell I'm developing for a Tee intersection (testing right now) and use the typical two reference lines:  Side road centerline and intersecting road edge of pavement.

1.  I had the impression I could click to use a breakline feature from the terrain for the intersecting EOP, but I find I cannot, although It does hold elevation info, so why can I not use it?

The terrain was created from .dtm file.  It happens the EOP line is also along the external boundary.  I had to fiddle a little with the terrain template to isolate the EOP (breaklines) to their own level in order to turn off the external, but I got that part, but it did not work.  Nor could I use the back of curb for the same purpose.

I created a HZ feature and profiled it per breakline data, but it means duplicating data.  Using this new feature the civil cell placed just fine.  Why is the breakline not usable?  The terrain resides in a reference file.

2.  Also, my template section uses a null point PGL at the top of curb elevation and has a roof-top crown peaking just beneath, at top of pavement.  See graphic attached.  Not sure how to build that cell properly, as the PGL controls from above the surface crown and is not on the pavement surface.  Suggestions would be appreciated.  What breakline(s) need to get added to pavement surface, and will point control be lost if I need to flatten out the cross-slopes?

Pat