Goudel III Water Treatment Plant Expansion Project in Niamey of Niger The purpose of the project is to build a water treatment plant with daily production capacity 40000m3 in Goudel region, Niamey. The main works include: construction of flocculator, mixing weir, sedimentation tank, and supply & installation of matched hydraulic & electric equipments. The completion of the project greatly eased the pressure of potable water in Niamey.