A sand dam is a reinforced concrete wall built across a seasonal riverbed to capture and store water beneath the sand. It holds 2-20 million liters of water depending on size of the dam and the size of the sand particles collected. Evaporation is reduced to a minimum with the water stored beneath the sand. The sand also filters the water clean and protects it from parasite carriers such as mosquitoes and snails, reducing the incidence of two of the Africa’s greatest killers of children under five; Malaria and Diarrhea. Water can be abstracted by scoop holes, pipe infiltration gallery or through a protected shallow well with an installed hand pump.