African Union-brokered talks ended without an agreement on a disputed dam project on the Nile River’s main tributary, potentially ratcheting up tensions between two key U.S. allies on the continent. The negotiations over the Grand Ethiopian Renaissance Dam in Ethiopia have again foundered over the pace at which the country plans to fill the 74 billion cubic-meter reservoir, stoking Egypt’s concern that it will lose control over its water supply to a regional upstream rival.

Egypt’s Irrigation Ministry said in a statement that the talks had concluded with continuing differences on the main issues regarding the filling and operation of the dam.

Vital Interests

While Egypt’s stance has been more conciliatory in the negotiations that have spanned much of the past decade, it has already involved both the U.S. and the United Nations Security Council in the dispute in a series of meetings that have also failed to make a breakthrough.

In a June 29 letter to the Security Council, Egypt vowed to “uphold and protect the vital interests of its people.” It went on: “Survival is not a question of choice, but an imperative of nature.”

The Egyptians want a discrete agreement relating only to the dam and believe that Ethiopia is seeking to redraw a so-called colonial-era agreement to grant itself more control of the flow of Africa’s longest river, the official said.

Another point of contention is the talks over mechanisms for any further disputes, another person associated with the talks said. Ethiopia wants disputes to be sorted out between Egypt, Ethiopia and Sudan and if that fails, within the African Union. Egypt wants the right to appeal to international bodies such as the UN.

Sudan has expressed similar concerns to Egypt over the construction and plans for the use of the dam. Ethiopia has long claimed its neighbors have no reason to fear an impact of Nile flows and says high rainfall make this year a propitious time for filling. In a June 26 letter to the UNSC, the country alleged a policy of “impeding any water use by Ethiopia.”