The work is due to be completed by 2015 and includes modernising or replacing substations, cables, feeder stations, transformers, switchgear and rectifiers.

The contract for lot 1 covering lines 7 and 10 and lot 3 for lines 11 and 12 was awarded to a consortium of Siemens and MPE. The lot 1 contract is worth Reais 117.5m ($US 58m) and lot 3 Reais 106m. The lot 2 contract for lines 8 and 9 went to the ABB-Rodominas consortium for Reais 164.3m.