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12 August 2005

Mott MacDonald wins two new contracts on US$2.8 billion bridge and tunnel links in Korea

Mott MacDonald has been awarded two contracts from Yooshin Engineering Corporation to assist in the design and build of strategic new bridge and tunnel links in Korea. Both projects are road crossings connecting islands to the mainland – Geoje Island in the south near Busan and Incheon Island in the north near Seoul.

One of the contracts is for the design review of a new 800m main span cable stayed bridge, set to be one of the longest of its kind in the world, together with approach bridges and viaduct spans, the total length of which will be 12km. Due for completion by October 2009, this US$1.24 billion bridge will link mainland Korea with the new airport at Incheon, South Korea and will help to provide improved access to the main airport serving the capital, Seoul. The structure will have a steel deck with 238.5m high concrete towers to give 74m clearance of deck over shipping.

The other contract is to assist Yooshin Engineering Corporation in supervising the construction of a US$1.6 billion fixed link from the Korean mainland near Busan to the Island of Geoje. This island is large, heavily populated and home to a number of Korea’s major shipyards. The existing route from Busan around the coast will be significantly reduced in length by the new crossing.

The project will involve building two cable stayed bridges with main spans of 475m and 230m, and an immersed tube tunnel 3.7km long, with a total crossing length of 8.2km. The rectangular dual two-lane undersea tunnel will be one of the longest and deepest in the world and will require extensive ground improvement. An existing small island will form the transition between the tunnel and the approach spans for the bridge section of the crossing. This project is due to be completed in December 2010.

Mott MacDonald’s project director, Stuart Davis, previously worked on the redesign of Kayang Bridge in Korea. This involved helping Seoul Metropolitan Government to manage the construction of this major link to the city’s 2002 World Cup Stadium and it was the first ever contract awarded by a Korean public authority to a foreign consultant. He said of the contracts, “We are delighted to be working with Yooshin Engineering Corporation on such prestigious projects in Korea, it offers us a fantastic opportunity to demonstrate our bridge and tunnel expertise and to help create two national landmarks linking up the Korean mainland.”

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