Incatema starts works on the last phase of the maritime section of the Cambérène outfall in Senegal

17 November, 2022

Once the execution of the tunnel has been completed, Incatema Consulting & Engineering has started the last phase of the maritime works of the Cambérène outfall, in Senegal. The aim is, on the one hand, to prepare the seabed to extract and retrieve the tunnelling machine, which, as we have said, has just finished these days the execution of the microtunnel, and on the other, to place 100 m of weighted polyethylene pipelines on the seabed to ensure treated wastewater outlet through 26 shafts.

Cambérène sea outfall has two trunks, land and sea. Urban wastewater from Cambérène district, located north of Dakar, is treated in the plant Incatema has built. Thanks to a newly built pumping station, within the wastewater treatment plant plot, treated wastewater is pumped into the sea. All the land trunk collects treated wastewater from various outfalls that travel across town and arrives at a collecting well connecting to the sea trunk of the outfall whose construction we are completing.

Lastly, treated wastewater is disseminated from the seabed 1,300 m away from shoreline, in the farthest edge. “There, previously treated wastewater follows a natural physical, chemical and biological transformation due to temperature, salinity, pressure and ultraviolet radiation and the marine currents. The process allows to reduce environmental impacts, according to the Senegalese government plan to reduce pollution in North Dakar”, points out Fernando Díaz, head of Infrastructures department at Incatema Consulting & Engineering.

The construction of this sea outfall is financed by the Islamic Development Bank, contracted by the Senegalese National Sanitation Company (ONAS). This infrastructure aims at meeting UN Sustainable Development Goals no. 6 y 14, “Clean water” and “Life under water protection” as we indicated here.