ADDIS ABABA (Reuters) - Ethiopia’s giant new hydropower dam on the Blue Nile will begin generating power in the next 12 months, the country’s president said on Monday. “This year will be a year where the Grand Ethiopian Renaissance Dam will start generating power with the two turbines,” Sahle-Work Zewde said in a speech to parliament. Ethiopia is locked in a dispute with Egypt and Sudan over its $4 billion Grand Ethiopian Renaissance Dam, which Cairo has said could threaten its main supply of water.