Use the Export Feature Lines to SHP command to transfer survey linework data from an Autodesk Civil 3D drawing to a SHP file.
After exporting your linework data to a SHP file, you can include the file in the import event for another drawing.
The linework may include feature lines, 2D polylines, or 3D polylines. Selected property set data will also be included in the export.
SHP Import/Export Utilities
SHP Import/Export. Double-click Export Feature Lines to SHP to open the
Feature Line Export SHP File dialog box.
to display the Open File dialog box. Use this dialog box to specify the file name and path where the SHP file will be located.