Construction of separate unitary header system in Nantes (44)



In line with the future Chronobus line project in Nantes, Nantes Métropole is in the process of rehabilitating and restoring the water network pipes under the proposed future lines. In the case of the Boulevard Babin Cehvaye, the existing egged shaped unitary header will be completed with the addition of a waste water treatment system in order to update the community water treatment system.




  • Year : 2011
  • 1,1 km of pipe in an urban area
  • 4 000 m3 of urban earthwork
  • 35 individual connections
  • 4 months of work
  • Between 2 and 4 meters deep
  • 4 stages of work