The rehabilitation of pipe. It most often includes the repair, restoration or rehabilitation of sanitary sewer & storm sewer lines and less often includes culverts, water lines, irrigation and plant piping. Since it includes fixing old pipe, it does not include pipe replacement. It can include but is not limited to the following methods of rehab:
cement mortar lining
fold & form
deform & reform
clock spring installation
Does not include open cut pipe replacement or abandonment.