Plotting Special Ditches in Sheets

I have been trying now for a while to try to figure out how to plot my special ditch in my profile sheet for my mainline alignment.  I cannot find any direction on how to do it.  Also, can I reference in a dgn file that has the special ditch profile in it or does the ditch profile have to be in the same file that my mainline profile/corridor is in?

Any help would be great!