With only a few months to go before the dam's third reservoir is filled over the next rainy season, the pressure is weighing on the Senegalese president's shoulders. Sall, who is also the chairman of the Africa Union, knows his input on the decade-old thorny issue will be particularly scrutinised.
On 25 October, the Egyptian prime minister Moustafa Madbouli along with six of his ministers will be in Paris to meet with French officials. The delegation will also attend a France-Egypt business summit organised by France's business lobby Medef and meet representatives of a dozen French companies.
Egypt is preparing a major conference on water issues in Cairo in October with several African heads of state. Its aim is to find new markets for Egyptian companies but also allies to help it block next year's planned third filling of the Grand Ethiopian Renaissance Dam.