News Archive

London’s Tideway Tunnel preferred bidders announced

The preferred bidders have been chosen to build London’s 25km long, 7.2m i.d. Thames Tideway Tunnel. The companies will build a component each of the three parts of Thames Water’s mega tunnel that has been split into geographical sections of west, central, and east. The contractors chosen are: Read more

Bertha’s breakthrough lifts spirits in Seattle

Just before noon yesterday, February 19, a long-awaited plume of dust rose into the air on the SR-99 Alaskan Way Viaduct Replacement project, in Seattle, marking Bertha’s slow and successful breakthrough into her repair shaft. Read more

Prince Charles marks 150 year anniversary of London’s sewer network

London’s sewers hosted royalty today, February 18, as Prince Charles toured Thames Water’s newly completed £635m Lee Tunnel to mark 150 years since the capital’s sewerage network went into service. Read more

$11 billion Melbourne metro rail line resurrected by Daniel Andrews

In Australia, Daniel Andrews has staked his credibility as Victorian Premier on beginning construction of the Melbourne metro rail line before the next election, having scrapped the former government’s plans for the East West Link cross-city road tunnel. Read more

Boris reveals plans for more London road tunnels during visit to Boston’s Big Dig

The Mayor of London, Boris Johnson, yesterday (February 8th) confirmed five locations for planned major road tunnels under the UK capital. Johnson and Transport for London have considered more than 70 locations across the capital where the introduction of tunnels, fly-unders and decking could deliver benefits. Read more

Mühlhäuser acquires Obermann Systems

Just one year after the successful handover of the reins to the fourth generation at Karl-H Mühlhäuser GmbH & Co, the German-based tunnelling logistics equipment supplier announced the first acquisition in the company’s 100-year history. Read more

SNWA launches tender for Intake No 3 Low Lake Level Pumping Station

In the US, the Southern Nevada Water Authority (SNWA) is to tender the next stage of the Lake Mead Intake No. 3 project, a Low Lake Level Pumping Station that will draw water from the new intake structure in the bottom of Lake Mead and through the new 3-mile (4.8km) tunnel which has been constructed by Vegas Tunnel Constructors (VTC). Nearly 50% of the contract involves underground work. Read more

NorthConnex contract confirmed

Australia’s Federal Assistant Infrastructure Minister Jamie Briggs and New South Wales Roads Minister Duncan Gay have announced contracts had been signed to close the deal on Sydney’s $3bn NorthConnex project. Read more

Bertha rescue pit complete


Seattle Tunnel Partners has completed excavation of the 39.5m deep pit that will be used to access and repair Bertha, the 17.5m diameter Hitachi Zosen SR 99 TBM being used to bore the 2.7km long Alaskan Way Viaduct Relacement Tunnel. Crews removed the final scoop of soil from the pit on Friday, Jan. 30.

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Cityringen circle line metro TBMs reach Copenhagen Central

A milestone was reached in the construction of Copenhagen’s Cityringen metro circle line on January 29, when Denmark’s prime minister Mrs Helle Thorning-Schmidt and transport minister Mr Magnus Heunicke witnessed the breakthrough of TBMs ‘Eva’ and ‘Minerva’ into the station box at Copenhagen Central station. Read more

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