Spanish infrastructure company ACS said its Avanzia unit won a $323m contract to upgrade the Tula power plant in Mexico.

It follows Avanzia’s other recent contract wins for the overhauls of the Manzanillo and El Sauz power plants in the Mexican state of Queretaro, ACS said in a statement.

Work on the Tula project will start in February 2015 and is expected to be completed in 29 months for the first combined-cycle gas-fired power unit and 31 months for the second unit, ACS said.

The 638 MW plant is operated by Comision Federal de Electricidad (CFE) and the contract awarded covers engineering, equipment, construction and start-up of the two combined-cycle units, as well as associated services aimed at ensuring Tula’s efficient operation, ACS said.