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Wheaton Station and Tunnels

Design of value engineering; cost proposal for contractor.
Estimated cost: Commencement:
August 01, 1983
Completion date:
June 01, 1987
600 5th Street
Washington, DC 20001
United States
Technical data:

Subway, 2 tubes, 1 double crossover, 5 shafts and cross adits, 1 station and 1 escalator, Length: 2 x 8530 ft., Construction method: NATM

Geology description:

Quartz, diorite, micaschist, gneiss.

Geology types:
Bid cost: Final cost:
$48,000 USD
Service areas:
Construction methods:
Tunnel length:

The project was part of the extension of Glenmont Route north into Maryland and included Wheaton Station and two approx. 2500 m long running tunnels as well as ventilation shafts and a cross-adit. Ilbau America, advised by Dr. Sauer & Partners, recommended changes to the existing conventional design and introduced the New Austrian Tunnelling Method (NATM), which was then used to construct the station tunnels, running tunnels and ancillary structures. The shaft at Hildarose Drive was constructed in conjunction with a large double cross-over.

Completed station platform
Installing waterproofing
Escalator shaft
Waterproofing installed
Finished Lining