Hi Josh,
the tool is there, but it is VERY counter intuitive (to me at least).
The tool you are looking for is "Vertical Geometry>Project Profile to Element"
The workflow is like this.
1) The element you wish to project (say your surveyed ditch element) must already have a profile assigned and its profile must be displayed in a profile view.
2) Activate the tool
3) Select the profile representation of your "surveyed ditch".
4) Now select the plan element you wish to project the ditch onto... probably your road ceneterline.
You will see dynamic graphics display in the plan view showing you the projection... DP to accept.
5) Now make you plan view active.
6) Hover over your road centerline, select the "Open Profile Window" inplace tool and DP into another view to activeate the profile view.
You will now see the projected elements in that road ceneterline profile.
To me, this is very confusing.
Why isnt the tool called "Project Element to Profile"?
1) DP to select the Profile View you want the elements projected to.
2) Select the 3D or Profiled plan elements you wish to project to that profile.
3) Continue selecting until you are done.
Easier??