Westerschelde Tunnel Construction, Netherlands

Key Data:

Project name

Westerschelde Tunnel

Project type

Tunnel

Location

Zeeland, The Netherlands

Construction commenced

November 1997

Estimated completion date

November 2003

Estimated total construction costs (inc. tunnel and roads)

€726 million (1.6 billion guilders)

Tunnel length

6.6km

Deepest point

60km below the Amsterdam Ordnance Datum

Maximum slope

4.5%

Diameter

11m

Tunnel width

3.5m lanes in each tunnel

No. of tunnel ring segments

52,000

Manufacturer

Herrenknecht

Length

185m

Construction timeframe

15 months

Installation timeframe

3 months

Average daily progress

12m

Boring operations material production

1.6m³