Engineering on the “Bassée” project

General PMC services for engineering work on the “Bassée” and assistance with public consultation/communication

Following on from the feasibility study for the vast hydraulic engineering project for flood prevention in the sector known as La Bassée, upstream of the confluence of the Seine and Yonne rivers, Egis, in a consortium with Ashurst, provided general PMC services for this project.

La Bassée
Date : 2008-2016
Duration: 8 years
Contractor: Grands Lacs de Seine (Institution Interdépartementale des Barrages – Réservoirs du Bassin de la Seine)

Project overview

The aim of the La Bassée engineering work is to improve the protection of the Paris region against damage arising from simultaneous floods on the Seine and Yonne rivers, a phenomenon responsible, notably, for the catastrophic flooding in Paris in January 1910. The work would involve the building of several storage units (basins temporarily retaining the flood waters), with a total capacity of 55 million m3.

 Provision of these services was entrusted to the Egis /Ashurst consortium and comprised consultancy and management, including general overseeing of the project, assistance in developing the programme, selection of a lead contractor and awarding of works contacts, as well as assistance with administrative procedures land acquisition steps and public consultation and communication.

Our missions

The mission covers the main elements addressed by the consortium:

  • study of social acceptability and review of public consultation for the project;
  • drafting of specifications for additional studies required to determine the operation programme;
  • drafting of the operation programme;
  • study of possibility of use of PPP arrangement;
  • drafting of file for referral to CNDP (national public debates commission) and preparation of public debate;
  • development of land acquisition steps relating to instituting of rights of way in case of flooding.