To Export Storm Sewers .stm Files From AutoCAD Civil 3D

You can export one or more pipe networks into an .stm file. You must choose entire pipe networks. You cannot export individual parts, or a set of connected parts within a pipe network.

The .stm file can then be opened by the Hydraflow Storm Sewers extension for analysis and editing. After editing the file in Storm Sewers, you can import it back into AutoCAD Civil 3D. Changes made to the file while in the Storm Sewers extension are recognized in AutoCAD Civil 3D.

To export an .stm file from AutoCAD Civil 3D

1. Do one of the following:
   • In the drawing, select a pipe network. On the Pipe Networks tab, click the Analyze tabStorm Sewers drop-down Export To File.
   • Click the Output tabExport panel Export To File.
   • In Toolspace, on the Prospector tab, right-click the Pipe Networks collection, or right-click the pipe network you want to export, and then select Export to Storm Sewers.
   • At the command line, enter ExportStormSewerData.
2. On the Export to Storm Sewers dialog box, specify the pipe networks to be exported, and then click OK.
3. On the Export Storm Sewers to File dialog box, specify the location and the name for the .stm file, and then click Save.

To export an .stm file from AutoCAD Civil 3D and open it in Storm Sewers for editing

1. Do one of the following:
   • In the drawing, select a pipe network. From the Pipe Networks tab Analyze panelStorm Sewers drop-down Edit In Storm Sewers.
   • At the command line, enter EditInStormSewers.
2. On the Export to Storm Sewers dialog box, specify the pipe networks to be exported, and then click OK.
3. On the Export Storm Sewers to File dialog box, specify the location and the name for the .stm file, and then click Save.