If the original HEC-RAS file has the cross sections in the correct location on the topo map, then when you import the HEC-RAS model into RiverCAD the cross sections should appear in the correct location. However, you need to make certain to select the radio button item "Use real world coordinates" and not "Use HEC-RAS virtual coordinates (schematic)" in the Import HEC-RAS Project dialog box.
If you continue to have difficulty in importing your HEC-RAS model, please forward all of the associated HEC-RAS data to me as a ZIP file and I will look at it and get back to you as quickly as possible.
Sincerely,
Chris E. Maeder, M.S., P.E.
Senior Technical Engineer
chris.maeder@bossintl.com