As the Grand Ethiopian Renaissance Dam (GERD) nears completion, the Nile River Basin is at a crossroads. The next few months will be consequential for relations between countries in the river basin—notably Ethiopia, Sudan, and Egypt—because dam management upstream could have consequences for the supply of water downstream. Although the three countries began discussions after the project was announced in 2011, they have yet to reach an agreement on how the new reservoir should be filled and managed. Despite the absence of an agreement, Ethiopia intends to begin filling the reservoir this July. This article describes the competing perspectives between countries, explains reasons for the lack of an agreement, and provides recommendations for addressing the challenges of the GERD. If …