Metropolitan Washington Airports Authority (MWAA) has awarded the contract to the Capital Rail Constructors joint venture. Parsons is serving as the lead designer for the nearly US$1.2bn (£790m) project.
Work involves designing and building an 18km segment of the Silver Line including six stations.
“This is the first of many milestones to come for the second phase of the Silver Line,” said MWWA president and CEO Jack Potter. This contract is the largest of several Phase 2 procurement packages and represents approximately 50% of Phase 2 work.
Phase 1 of the project is currently under construction and is now more than 90% complete. Construction of Phase 2 is due for completion in 2018.