Construction and electro-mechanical assembly of the interconnection system between the different pits and the 50MW geothermal plant. Consists of the construction of stations for separation of solid materials, station for the re-injection and pumping of condensed material, plus 15 kilometers of pipeline to connect the plant and 6 extraction and re-injection pits. Project successfully executed in the Ollagüe area, that took 400,000 man/hours with staff working at 4,600 meters above sea level, in high mountain conditions, facing low temperatures and strong winds.