The transmission lines allow the transportation of electrical energy from the generation plants to a substation, between two substations or between the same generators. These lines are characterized by their wide length, capacity and power to carry voltage levels up to more than 500 kV.

ESE made the electromechanical assembly and civil works between Cochabamba and La Paz on the 4,500 meters above sea level that included the construction of entry, exit and expansion bays. Several transmission lines were also carried out between the boundaries of La Paz and Beni with results that were highly accepted by customers. ESE has the personnel trained to make the foundations for transformers, fire walls, porticos, patio equipment, electrical conduits, control rooms, access roads and all complementary works.