AFRICANGLOBE - Ethiopia rejected a proposal that would guarantee Egypt the rights to most of the Nile River’s water, as disagreements cast doubt over future talks about Africa’s biggest hydropower project. The 6,000-megawatt Grand Ethiopian Renaissance Dam on Ethiopia’s Blue Nile River, set to be completed in 2017, has raised concern in Cairo that it will reduce the flow of the Nile, which provides almost all of Egypt’s water. The Blue Nile is the main tributary of the Nile.