Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. US-Brokers Nile Dam Deal Still Deadlocked Patsy Widakuswara WASHINGTON - The latest round of talks between Egypt, Ethiopia and Sudan in Washington has stretched into its fourth day as the parties struggle to reach a comprehensive agreement on the Grand Ethiopia Renaissance Dam (GERD), a massive hydropower dam project on Ethiopia's Blue Nile River. The White House released a statement saying President Trump spoke with Ethiopian Prime Minister Abiy Ahmed on Friday, and "expressed optimism" that a deal was close. The tripartite meeting hosted by the U.S. Treasury is the parties' last-ditch attempt to resolve the question of the operation of the dam, particularly the filling of its reservoir, an issue that has triggered concerns of a "water war" between Egypt and Ethiopia. The meeting was scheduled to end Wednesday but continued until Friday without an agreement on filling the reservoir. The U.S. Treasury released a statement Friday that the parties will continue to work on the legal and technical aspects of the agreement for a signing by the end of February. The agreement would include a schedule for a stage-based filling plan of the reservoir, and a mitigation mechanism for filling and operations during periods of drought and prolonged drought. Ethiopia and Egypt have been negotiating for years, but several technical sticking points remain, including the duration and rate at which Ethiopia will draw water out of the Nile and the quantity of water that will be retained. Cairo fears Ethiopia's plans to rapidly fill the reservoir could threaten Egypt's source of fresh water. The technical details of how, when, and where the water will flow are a life-and-death matter for each party," said Bronwyn Bruton, deputy director of the Atlantic Council's Africa Center. Bruton added that the situation is complicated by "international organizations and mediating third party countries, which all come with their own interests and agendas." With the Trump administration's urging, last November the parties agreed to hold four technical governmental meetings at the level of water ministers with the World Bank and the United States attending as observers. They agreed to a deadline of January 15, 2020, for reaching an accord. When they failed to reach an agreement, the parties agreed to another round of talks this week. The main issue has been a lack of consensus, said Mirette Mabrouk, director of the Egypt Program at the Middle East Institute. "Ethiopia's priority has been to complete the dam and Egypt's priority has been to ensure that its near sole source of water is not decimated," Mabrouk said. A flexible treaty In previous statements, the ministers have recognized that flexibility in trans-boundary water management is essential considering the constantly changing levels of the Nile. They have agreed that guidelines for the filling and operation of the GERD "may be adjusted by the three countries, in accordance with the hydrological conditions in the given year." However, competing hydrological and political interests have hindered negotiations. The director of the Water Institute at the University of North Carolina, Aaron Salzberg said that parties are striving for an agreement that is "easily codified in terms of numbers" --how fast you can fill, how much water is released." At the same time, he says, the agreement must establish a joint decision-making process that allows flexibility in responding to changing conditions, but not one that may be "too open to interpretation and set the stage for conflict down the line." This is not something that should be forced, Salzberg added. "The parties themselves must drive the process. This is an agreement that will need to last multiple lifetimes," he said. .