Centrais Eletricas Brasileiras SA (Eletrobras) is a Brazil-based holding company engaged in the electric power generation, transmission and distribution. Eletrobras operated 36 hydroelectric plants, 120 thermal power plants, two nuclear power plants and 4 wind and solar farms, which totaled 41,621 megawatts (MW) of installed capacity as of December 31, 2011. Additionally, the Company is responsible for approximately 56,179 kilometers of transmission lines, 187,256 kilometers of distribution lines and 229 substations. The Company is present in Brazil and other countries of South America, including Argentina, Uruguay and Venezuela. The Company has 12 such subsidiaries as Eletrobras Distribuicao Amazonas Energia, Companhia Energetica de Alagoas - Ceal, Companhia Energetica do Piaui - Cepisa, among others. In October, 2013, the Company acquired a 50% stake in the share capital of Rouar SA, held by Administracion Nacional de Usinas y Transmisiones Electricas UTE.