Peruvian Hidroeléctrica Tingo receives EIS approval for 50 kV line August 13, 2012 | Latin America News Peruvian Ministry of Energy and Mines' (MEM) Department of Environmental Affairs has approved the EIS of the 50 kV line proposed by hydropower developer Hidroeléctrica Tingo. This content is available to only paying subscribers. Username or E-mail Password Remember Me Forgot Password