KHARTOUM - Sudan proposed on Wednesday upgrading negotiations with Egypt and Ethiopia on a Nile mega-dam to prime ministerial level in a bid to break the deadlock.
"The disputes between the three delegations are of a legal nature especially in terms of a... mechanism for water sharing. Sudan has proposed to refer these issues to the prime ministers of the three countries," Yasser Abbas, Sudanese irrigation and water resources minister, told reporters after the latest round of virtual talks.
No timeline has been set for the prime ministers to meet as Addis Ababa continues to stick to the July deadline of filling the reservoir of the Grand Ethiopian Renaissance Dam to the consternation of its partners.
In a late Wednesday statement, Egypt's irrigation and water resources minister Mohamed Abdel Aty roundly blamed Ethiopia for the negotiations slowing down to a grinding halt.
"The negotiations held recently did not achieve any progress worth mentioning because of Ethiopia's stubborn position on technical and legal matters," he said.
"At the end of the irrigation ministers' meetings, Ethiopia rejected the suggestion that the issue be referred to the three Prime Ministers as a final chance to examine the floundering of the negotiations and to find solutions for the various disputes," the statement added.
The GERD, set to be Africa's largest hydropower project, has been a source of tension in the Nile River basin ever since Ethiopia broke ground on it nearly a decade ago.
Ethiopia sees the dam as essential for its electrification and development, while Sudan and Egypt view it as a threat to essential water supplies.
"Sudan will not accept the filling of the lake unilaterally before an agreement is reached," Abbas added.
The recent rounds made progress on the technical front but the minister stressed that "legal differences need a political decision by the heads of government of the three countries".
The United States, which has been observing the talks along with the European Union and South Africa, sent a pointed message on Wednesday to Ethiopia.
"257 million people in east Africa are relying on Ethiopia to show strong leadership, which means striking a fair deal," the White House's National Security Council posted on Twitter before the latest meeting.
Washington's involvement in the heated talks began in November after Egyptian President Abdel Fattah al-Sisi put in a request to his ally US President Donald Trump.
The 6,600-kilometre-long (3,900-mile) Nile is a lifeline supplying water and powering electricity in the 10 countries it traverses.
Its main tributaries, the White and Blue Niles, converge in the Sudanese capital Khartoum before flowing north through Egypt to drain into the Mediterranean Sea.
"Technical issues have been resolved -- time to get the GERD deal done before filling it with Nile River water!," the National Security Council added.