Surface editing using OOPS

We normally receive topographical surveys as 3D polylines and blocks which we use to create a Civil 3D existing ground surface model. 

The 3D cad drawings are at times not layered properly that I would wrongly define polylines I don’t need such as bridge soffits, overhead cables and any other polylines that could mess up the surface model.  Below is an example where the overhead cables were included in the breakline surface definition.  

 

A quick way to amend the surface model without deleting the polyline is to use the OOPS command.  The OOPS command restores objects erased by the last ERASE command.

Delete the overhead cable polylines using the normal ERASE followed by the OOPS command and rebuild the surface.  This will remove the overhead cable polyline from the surface definition but retaining it in the drawing.