In 2016 , Bechtel stated that it is the largest civil engineering project the company has undertaken in its history .
Bechtel was contracted in 2013 to head a consortium to develop six lines , including all tunneling and stations .
In 2016 , Bechtel stated that Bechtel is the largest civil engineering project the company has undertaken in Bechtel 's history .
Bechtel was contracted in 2013 to head a consortium to develop six lines , including all tunneling and stations .