Iberdrola Ingeniería has bagged a €43.1 million contract, which the company's engineering and construction subsidiary says is the largest energy infrastructure it has undertaken in Spain.

The company has been chosen to construct a new transmission line to distribute the energy generated by nine wind farms corresponding to Group 3 of the Huelva electrical clearing zone, with a total power output of 335.15 MW.

The new double circuit transmission line is designed for 400 kilovolts (kV) but will initially operate at 220 kV.

It will connect the new substation of Puebla de Guzmán (Huelva) with that of Guillena (Sevilla) and will be 120 kilometres long. Later on it will serve as the main hub for transporting electrical energy to Andalucía and will reinforce the interconnection with Portugal.

The work will be carried out during the second half of this year and through much of 2009, and Iberdrola Ingeniería plans to deliver it turnkey ready to go into operation in October of next year.

It will serve to the following wind farms to the transmission grid: Los Lirios (48 MW), La Retuerta (38 MW), El Almendro (43.5 MW), La Tallisca (40 MW), Valdefuentes (28 MW), Las Cabezas (17.4 MW), El Centenar (40 MW), El Saucito (30.25 MW) and Majal Alto (50 MW).

As per the information available, Iberdrola Ingenieria is developing renewable energy projects worth €710 million, which will have a joint capacity to generate about 1,250 megawatts of electricity. Among them are €170 million in wind power developments that will have a combined capacity to generate about 1,000 MW in electricity. Most of them are wind farms in Spain, as well as two wind farms in Poland, Iberdrola said.