To Export Civil 3D Objects to File Geodatabase (FGDB) Format
You can use the Export to FGDB command to export the following Civil 3D objects to a file geodatabase that can be used in ArcGIS or in another application:
Alignments
Feature lines
Plots
Pipe networks
Points
The Export to FGDB command saves the file geodatabase to a specified folder and it does not require an ArcGIS account or publishing privileges.
To export objects to FGDB
Ensure that your drawing has a co-ordinate system assigned to it. If a co-ordinate system is not specified for the drawing, you will be prompted to assign one after selecting the command.
On the Output tab, click Export panel
Export to FGDBFind.
In the Export to FGDB dialog box, select the objects to export.
Click the Edit Export Settings button.
Specify the ArcGIS category and destination layer for each object type.
Click each object type to display a list of attributes that you can export for the object type. You can select the tick boxes for the attributes you want to export and change the default attribute name.
Click OK.
Specify a file name and location for the file geodatabase and click Save.