The Organisation pour la mise en valeur du fleuve Sénégal (OMVS; in English Senegal River Basin Development Authority) is an organisation grouping Guinea, Mali, Mauritania and Senegal for the purpose of jointly managing the Senegal River and its drainage basin. In 1963 a predecessor organization was established, the Organisation des Etats Riverians du Fleuve Sénégal (or the Senegal River Riparian States Organization), with the four border countries—Guinea, Mali, Mauritania, and Senegal—to manage the Sénégal River drainage basin and the river itself. This organization dissolved when Guinea withdrew due to political tensions and the three remaining countries subsequently created the OMVS. Guinea returned to the organisation in 2006. More information...
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