The Waters of Mayotte wishes to strengthen the transfer capacity between the Potable Water Production Plant (UPEP) in Bouyouni and Mamoudzou in accordance with the Master Plan of Water Destined to Human Consumption (SDEDCH) in order to meet the water needs of the villages in the north of Mamoudzou. On the other hand, the current supply line is positioned on private plots and has a high point that significantly limits the transfer capacity. The layout of the current pipeline includes the plot to host the future Lycée des métiers du bâtiment de Longoni. The purpose of the operation is to replace and strengthen the pipeline of sections 3 and 5. The work to be carried out is: _ Lot 1 is the upstream part of section 3. It concerns the realisation of the DN 500 melted Potable Water Supply (AEP) network from the upstream connection point (limit T2/T3) to the junction point with Lot 2. _Lot 2 is the downstream part of section 3. It concerns the realisation of the DN 500 cast AEP network from the point of connection with lot 1 to the downstream connection point (limit T3/T4). _Lot 3 is the pipeline portion of section 5, upstream and downstream of the crossing. It concerns the realisation of the DN 500 cast AEP network from the upstream connection point (limit T4/T5).