Egypt gets 95% of its water from the Blue Nile, which is one of two major tributaries of the Nile River. The Other major tributary is the White River which originates in Uganda. Egypt is concerned that the diversion of that water via a Dam will affect the flow of the Nile River water to Egypt, which it disparately needs to sustain itself. The Dam is 20% complete and is expected to cost $4.2 billion to complete. Ethiopia states that it needs that Dam to help generate the necessary hydropower to grow its economy.