In June, copper cabling worth tens of thousands of pounds was stolen from the Channel Tunnel Rail Link construction site.
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Sections of a drill which broke through the roof of a rail tunnel came from a construction site above the ground, accident investigators have found.
An Israeli army spokesman said the tunnel had been under construction for many weeks and that the gunmen also wore Israeli army uniforms, which added to the confusion.
The building owners said a wind tunnel analysis was done before construction.
Construction of the tunnel started in November 2007.
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Proponents of the project argue construction of the tunnel will provide economic benefits for Russia by allowing the country to develop its resource-rich, remote Far East region, while providing the U.S. with a reliable source of long-term energy.
Declared the European Green Capital in 2010, Stockholm is investing in new construction like the City Line tunnel, which will put commuter rail lines underground and double the number of trains able to move through the city.
In their 1950s heyday the ferries carried millions of passengers, but these numbers dropped due to competition from rail and the construction of the second Mersey road tunnel in 1971.
Engineers who have assessed the project to build deep underground storage facilities feel it would be a bigger construction challenge than that of the channel tunnel, with tunnelling between 200 and 1, 000 metres.
Its subsidiary, Aker Wirth, has construction projects in Iran, including a water tunnel in Ghomroud.
Mr Obama noted that the involvement of several jurisdictions, as well as private companies whose payments were tied to performance, meant "construction workers are on the job digging this tunnel, doing great jobs, getting good pay".
As the surge invaded this square-mile that comprises the southern tip of Manhattan and the oldest part of the island water swept through the Ground Zero construction site and it completely filled the Battery Park Tunnel.
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Before any construction work could begin, archaeologists employed by the Channel Tunnel Rail Link project were charged with investigating areas of Kent, Essex and London.
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The councillor also said that as the tunnel already features a memorial to a worker who died during its construction it would be right to commemorate Mrs Snell and Mr Rolfe.
After construction vehicles were moved away, the first traffic received a police escort through the tunnel.
"Immediate checks revealed that the augering operation was associated with construction activity on land about 13 metres (42ft) above the top of the tunnel, " it added.
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