Extension of the Subway, USA

International

Works completed

Washington D.C., USA

Category

Railway Works – Subways

Work start

1997

End of worls

1999

The work involved the construction of 1.6 miles of Dual Train Track. (0.5 mile consists of precast concrete, post-tensioned single-box segmented air structure, 0.8 mile of ground level and open-cut section and 0.3 mile of two (2) underground level stations.) The project includes sound barrier acoustic panels, retaining walls, two AASHTO girder highway bridges, vehicle parking areas, sanitary sewer, drainage, potable water distribution system and electrical distribution system.