About the Project

Phase 2 Overview

The Metropolitan Washington Airports Authority (MWAA) awarded Capital Rail Constructors, a joint venture of Clark Construction, LLC, and Kiewit Infrastructure South Co., a design-build contract for Phase 2 of the Metrorail Silver Line project.

Phase 2 will extend the Silver Line 11.5 miles west from the Wiehle-Reston East Station, through Washington Dulles International Airport and into Loudoun County, Va. Capital Rail Constructors will design and construct six stations and the supporting infrastructure necessary to power to the system. Five of the new stations — Herndon and Innovation Center to the east of Dulles Airport, and the Route 606, and Route 772 Ashburn stations to the west — will be built on ground level. At Dulles Airport, the team will construct an aerial station adjacent to Parking Garage 1. The station will be connected to the Main Terminal by an underground pedestrian walkway equipped with moving sidewalks.

MWAA is undertaking the Silver Line Project in partnership with Fairfax and Loudoun counties, as well as the Commonwealth of Virginia. Upon completion, ownership of the Silver Line will be transferred to the Washington Metropolitan Area Transit Authority (WMATA), the agency responsible for operating and maintaining the Washington region’s Metrorail system.

Once construction is complete, the system will be turned over to WMATA who will complete their testing requirements, train their operational personnel, and prepare for the start of revenue service.

Environmental Information

Download our Environmental Policy. (PDF)