This project involved the design and construction of a 23.1-mile extension of the existing 103-mile long WMATA rail system. Upon completion, Dulles Metrorail will provide high-quality, high-capacity transit service in the Dulles Corridor. New Metrorail service in the corridor will result in travel time savings between the corridor and downtown D.C., expand the reach of the existing regional rail system, offer a viable alternative to automobile travel and support future transit-oriented development along the corridor.


Phase 1 extends from East Falls Church to Wiehle Avenue on the eastern edge of Reston. It also includes four stations in Tysons Corner—Tysons East, Tysons Central 123, Tysons Central 7 and Tysons West. Construction began in March of 2009 and completed in 2013.


DMY worked on this $2.6 billion project since 2010 to provide construction materials testing and inspection services including field density tests for soils and aggregates, sampling fresh concrete, monitoring pile-driving activities, inspecting ready-mix concrete batch plants, and specialty testing.



Project Location  –  Fairfax County, Virginia

Project Owner  –  Metropolitan Washington Airports Authority (MWAA)

Project Client  –  MACTEC Engineering and Consulting (Now AMEC)

Project Completion  –  2013