To main content

Tunnel construction Warnow, Rostock

The Warnow Tunnel is located in Rostock, Germany, at the old mouth of the river Warnow in the Baltic Sea. In the DDR period this area grew out to be the main harbor of East-Germany. After the 'turn' (die Wende) in 1989 the port more or less died. Goods came cheaper and quicker from Rotterdam, Bremen and Hamburg by rail.

A new industry developed and now it is a very busy Ferry Terminal. Since the early 90's traffic jams in the city of Rostock (B105 - B103) caused disturbance of the development of the city and outer region. The solution to this problem was found in building a motorway ring road around Rostock, formed by A19 Berlin-Rostock-Hafen and the A20 Lübeck-Stralsund. For this, the ring road had to cross the river Warnow at the north of Rostock. Out of several possibilities for crossing the Warnow, the Immersed Tunnel alternative was selected.

The tunnel design and works 

The tunnel cross section comprises two parallel 2-lane motorways, with a total width of 23.1 meters and a height of 8.3 meters. Longitudinal, the tunnel consists of 6 elements of each 120 meters. Boskalis was involved in the engineering and execution of the Marine Works:

  • Dredging works
  • Immersion of the elements
  • Installation of the foundation bed
  • Backfilling and rock protection
  • Hydrographic and immersion surveys

Project vessels and equipment

The-Coastway.jpg

Coastway

Trailing suction hopper dredger

Download sheet

Related projects

Selected filters
Loading_TSHD_by_CSD_header.jpg

Creation bird island, Le Havre port 2000

Le Havre is the fifth largest container port in Europe and is expanding its facilities: the current 14 quays for container vessels are to be expanded with another 12 (all outside the locks). Port 2000’s rationale centres on Le Havre’s determination to position itself as a leading hub.

Read more
hfd_onder_header.jpg

Creating two berths pockets, NCIG terminal

For 200 years the Port of Newcastle has been Australia’s premier coal export harbor. Of the 95 Mtpa of various commodities such as steel, aluminum, minerals and so forth exported from Newcastle in 2008-2009, 90.5 Mtpa were attributable to coal. Average annual growth rate of coal exports from 1990 to 2006 was 6.1%. This constant increase has caused a spike in ships queuing to enter the harbour to be loaded. To increase capacity and avoid these traffic jams, a decision was made to develop a new coal stockpile area and construct a third coal terminal.

Read more
Balboa_2_header.jpg

Port expansion, Balboa

The plans to expand the Panama Canal represent one of the most important infrastructure improvements of the 21st century. Since its opening in 1913 the Canal has provided the shortest and most economically viable shipping route from Pacific to Atlantic seaports. With the ever-increasing size of modern-day vessels, it was inevitable that the Canal would need to be widened and deepened. The expansion of the Canal has made the extension of the Port of Balboa at the mouth of the canal on the Pacific Ocean a necessity. The Phase 4 projects included Marine Works and Civil Works to improve two existing berths and to build a completely new berth capable of handling not only Post Panamax but also Super Post Panamax ships.

Read more
DSCF0226_header.jpg

Land reclamation, North Manama Causeway

The purpose of the project was to provide additional land to accommodate a section of a proposed new highway system to service the area and to relieve congestion on the corniche road. Boskalis appointed Hydronamic (the in-house engineering department of Boskalis) to provide detailed design and on site assistance with supervision of the sub-contractor for the rock works.

Read more
Figure_1_header.jpg

Port environmental mitigation measures, Hamina

Hamina, which is close to the Russian border in south-east Finland, is a home port for the oil industry and a transit harbor for timber, cars and other goods on their way to Russia. To provide access for larger vessels it had to deepen the existing channel by two meters to 12 meters and create a new channel section. Terramare Oy, a subsidiary of Royal Boskalis Westminster, won this assignment in late 2008. The project started in July 2009.

Read more
Raahe_1_header.jpg

Port development, Raahe

The Raahe project is the largest dredging contract in Finnish history. Access for larger ships is economically important for the clients using the port of Raahe, such as the steel company Ruukki.

Read more

Dredging & Inland Infra

Offshore Energy

Salvage

Read more

Read more