The game-changing contract has been valued at £1.2bn, ranking it as the biggest building job in the UK excluding power station projects.
Bouygues takes the top slot in the September league and jumps from 14th to second place behind Kier in the annualised league of contract wins.
Among other contract wins Balfour and Carillion took an equal share of the £292m A14 upgrade job for Highways England.
On the building side, Greenwich Peninsula developer Knight Dragon awarded Mace the £150m project to deliver the next phase.
Murphy took an £56.9m electrification job for Network Rail to upgrade a section of railline from Gospel Oak in North London to Barking in the east of the Capital.