8. Supervision of rehabilitation work

The two phases prior to execution of the work are :

• Verification of the pipe's initial condition. This phase takes place at the start of the works, and involves visual or televised inspection to check that the condition of the pipe has not changed since the condition diagnosis study. A report (including a comparative report if necessary) is drawn up and submitted to the project manager (photo or video report);

• verification of the pipe's reception condition. This phase follows the preparatory work (hydrocleaning, milling of obstacles) and is also the subject of a report submitted to the project manager (photo report, video cassette).

Monitoring the execution of rehabilitation work can vary greatly depending on the...