The Rio Negro dam system is made up of the “Dr. Gabriel Terra”, “Rincón de Baygorria” and “Constitución” hydroelectric power plants. This set of dams is one of Uruguay´s electric supply system mainstays. The project consists in a "Flood Management Review” (FMR) and in the creation of an "Emergency-Action Plan" (EAP). Within the frame of this project the Negro River dam system´s hidrodinamic model is created, wich allows evaluation of operational criteria, analysis of backwaters reservoir and main courses, and the simulation of the different break scenarios, among others. It´s used the MIKE FLOOD modeling system.