evidence: In Benin, the sustainable management of multipurpose dams is a national issue. In 2008, the dam on the Okpara River, a tributary of the Ouémé River, was in an advanced state of degradation, due to a lack of monitoring and a lack of investment over several years. The government attributed responsibility for financing to the Société Nationale des Eaux du Bénin (SONEB), which indicated that it did not have the required means. According to the experts, the lateral spillway of the dam could fail in the case of heavy rain with very important social, sanitary, economic, and environmental repercussions. There is no other way to supply drinking water to the city of Parakou, the third largest city in Benin, which had about 200,000 inhabitants in 2008 and is experiencing significant population growth. [...] Concerning the Okpara dam, the project management of the rehabilitation works was ensured from 2011 to 2012 by the Territoire de Développement de l’Ouémé Supérieur (TDOS46 - Upper Ouémé Development Territory), with the financial support of the PPEA. A partnership agreement between TDOS and CWP-Benin allowed for the provision of technical assistance. The Local Water Partnership (PLE) of Borgou acted as delegated project manager. In particular, the action enabled the successful implementation of resource protection measures and the operationalisation of a consultation framework on the integrated management of the dam and associated ecosystems. Capacity building for concerted management of stakeholders and the participatory development and management plan for the livestock transit corridor at the sub-basin level continued during the 2nd phase of the PPEA (2013-2015).