This contract affects a section almost 800 m long, covered with DN1800mm steel pipe, laid in a trench in the EPAL compulsory-purchase strip.

The main tasks are:

• Land clearance and preparation of the track;
• Shoring of the trench for laying the pipe, using minipiles, in the area where the new supply line runs parallel to Alviela aqueduct;
• Fitting pipes and accessories underground;
• Lower crossing of Alviela aqueduct using horizontal pile-driving;
• Building a venting chamber;
• Building a chamber for the bottom outlet;
• Connections upstream and downstream from the current bypass delivery pipe.