Social movements are not a new field of study in Geography and the social sciences , but currently , it has proved an important area for the interpretation of social change. River communities, indigenous, peasants , quilombolas and traditional communities are examples of groups seeking through various forms of organization the legitimacy of their rights thus promoting new strategies and practices. Another group entered in this context are the populations that articulate against the construction of dams to try to secure their livelihoods. These movements place themselves in opposition to political appropriation of the territory who interpret only as sources, and not in multiplicity of meanings, such as their symbolic and cultural values. These territorial disputes, social movements against dams that are established shall be in place and ifs territory pillars, giving them new meanings and relating to the production of individual and collective identities . The central aim of this paper is to analyze how to set up the organization and mobilization of territorial movement that against the construction of small hydroelectric Santa Rosa I work expected to be installed in the Black River on the border of the cities of Braga and Rio Belmiro Flores , in the states of Minas Gerais and Rio de Janeiro respectively. The research aims to analyze to what extent the articulations between different actors (Association of Residents, Non-Governmental Organizations and Local Committees) and at different scales were important to the project not been implemented until now. In addition to the bibliographic, interviews with those involved as well as analysis of documents produced during the process of licensing the dam were performed.