Proposed Malewa dam in Kenya: Adequate adaptations to original design

Malewa dam in Kenya was first studied the 1990s at preliminary design stage, through a study funded by Japanese Government who entrusted JICA with it. At that time, its main purpose water supply to Nakuru, Naivasha and Gilgil cities Rift Valley. Thirty years later, reviewed within frame of feasibility World Bank account for revised needs -now excluding Nakuru- also taking into increased awareness environmental impact on downstream Lake (Ramsar zone), management scarcity, climate change trends, reliability issue, quality water, sedimentation, as well growing concern operation maintenance costs. Among solutions, focused gravity economic reasons, ground poses serious health problem this area due high fluoride content detrimental human consumption, construction confirmed be best solution after decision making process, subject some changes basic design, such using compensation flow generate hydro-power pump WTP nearby dam, mixing groundwater, building check dams implementing measures.