(1) All methods for restoring or upgrading the performance of an existing pipeline system. (2) Methods by which the performance of a length of sewer is improved by incorporating the original sewer fabric, but excluding maintenance operations such as tree root or silt removal. Or rehabilitation In situDescribes work on site; in the original place. For example, in situ concrete would differentiate cast in place concrete from precast concrete. renovation to improve the performance and extend the life of a defective pipeline, incorporating the fabric of that pipeline. Rehabilitation may be to address structural and/or hydraulic weakness.
