The state's abundant rivers and streams have been dammed to provide about fifty-five percent of the country's hydroelectric energy. Much of this is sent to other states accounting for over six percent of all of Mexico's energy output. Main power stations are located at Malpaso, La Angostura, Chicoasén and Peñitas, which produce about eight percent of Mexico's hydroelectric energy. Manuel Moreno Torres plant on the Grijalva River the most productive in Mexico. All of the hydroelectric plants are owned and operated by the Federal Electricity Commission (Comisión Federal de Electricidad, CFE).