3,050 MW Mambilla HPP Transmission Lines Project, Nigeria December 6, 2017 | Middle East & Africa Project Update The project entails the construction of 700 km of 330 kV transmission lines comprising two corridors—one between Mambilla and Makurdi, and the other between Mambilla and Jalingo. This content is available to only paying subscribers. Username or E-mail Password Remember Me Forgot Password