It is managed by the Organization for the Development of the Senegal River (l’Organisation pour la mise en valeur du fleuve Sénégal, or OMVS). The dam irrigates 2,550 square kilometres of land and maintains the navigability of the Senegal River between Saint-Louis, Senegal and Ambidédi, Mali.
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Deforestation of an already arid region, the displacement of farmers who cannot afford to purchase irrigation fixtures to utilize the dam waters, an increase in water-borne disease, and a sharp decrease in the vitality of local fisheries are just some of the consequences that have detracted from the Manantali Dam's success.