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Additional GI delays Silvertown tunnel contract award

Transport for London (TfL) has said that it expects to award the contract for the construction of the 1.4km long Silvertown Tunnel in July next year following the need for additional ground investigation.

The extra work for the twin bore road tunnel has led to the contract announcement coming two months later than the originally expected May 2019 date, according to recent board documents published by TfL.

TfL also said that delays in gaining a development consent order for the scheme meant that access to private land was delayed, which impacted on earlier ground investigation work.

TfL confirmed that the ground investigation has now been completed on site and has been supplied to bidders for use in the final technical submissions, which are expected to be submitted at the end of next month.

A TfL spokesperson said: “Since June 2017, we have been discussing the proposed agreement with the potential bidders for the Silvertown Tunnel, alongside their proposals for delivering the scheme.

”The first submission of technical proposals for evaluation were submitted in July 2018 and we expect final commercial and financial proposals in early 2019 before announcing a preferred bidder in Summer 2019. This will allow work to begin later that year and the new tunnel is expected to be open to traffic during 2024.” 

The two shortlisted bidders are Cintra Global and Hochtief PPP Solutions.

The impact of the delay will push the opening date for the tunnel back from 2023 to 2024.

ITM was awarded the baseline monitoring contract providing measurements, including the manual monitoring of the surrounding assets, such as the Emirates Air Line and Docklands Light Railway viaduct. Work has started to install the monitoring equipment and the 12 month monitoring period has commenced.

In May Transport secretary Chris Grayling granted a Development Consent Order for the project following a lengthy delay in the decision-making process.

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