Create a Pipe Structure Style
Korey Gaddy, of TPM Solutions, details how to create a new Plan View Structure Style from a block in Civil 3D.
From the TPM Solutions YouTube Channel
Korey presents the essentials of the creation of the Plan View of a Structure Style from a custom block well.
I suggest you employ raw AutoCAD to create the block and plan the name and storage location thoughtfully.
You actually do not want to include the Map coordinate system data in the WBLOCKed block.
This video is not a walk-through about the use of the Infrastructure Parts Editor in Civil 3D.