Bridge improvements reduce flood threat

The impact of the new Eden Bridge over the River Eden on its flood plain is a key issue to the construction of the Carlisle Northern Development Route (CNDR).
February 16, 2012 Read time: 2 mins
A corrugated steel system from Tubosider UK was used for the culverts
The impact of the new Eden Bridge over the River Eden on its flood plain is a key issue to the construction of the Carlisle Northern Development Route (CNDR). The new 8.25km road is being built west of the city following the flooding of Carlisle in north-west England in 2005, and increased flood risk generally, The local study carried out by the 2759 Environment Agency in the wake of the 2005 floods recommended lowering the flood bank downstream by 1m and removing an old railway embankment to mitigate the future threat to Carlisle but placing added importance on the Eden plain's topography.

As a result of the flood modelling work carried out by 2762 Capita Symonds, the technical adviser managing the project for Cumbria County Council, the plan for the new bridge's northern embankment called for a series of culverts with a combined cross section of 160m².

Although the illustrative drawing featured a concrete hatched structure, design engineers Scott Wilson recommended the greater practicality and easier installation of a corrugated steel system as manufactured by 2580 Tubosider UK, also the providers of the most economical solution.

"Tubosider's bolted plate is 2309 Highways Agency-approved, sufficient to gain approval, and using its detailed plans for assembling each prefabricated component, all 15 culverts are now in place. The final solution was for ten large diameter structures of 6mm thickness and then five smaller ones of 4mm, all ranging in span from 3.32-4.46m.

It's a system 1486 Birse Civils has often used before," said design manager Bob Gibson of Birse Civils, contractors for the design and construction of the new road.

Due to open in early 2012, the CNDR will run from the A595 to M6 Junction 44 and is a £176 million (e200 million) public private partnership (PPP) concession contract run for Cumbria County Council by 1146 Balfour Beatty through its wholly-owned subsidiary Connect Roads. It will take traffic away from Carlisle centre and improve links between west Cumbria, Scotland and the north-east of England. As winning bidder, Balfour Beatty also takes control of 150km of existing road network and will maintain this for a period of 30 years.
Road Structures

For more information on companies in this article

Related Content

  • FCC and ACS of Spain to take part in tender for UK’s Mersey bridge project
    May 22, 2013
    Spanish construction companies FCC and ACS say they will take part in the tender of the US$3.05 billion (£2bn) Mersey bridge project in the UK. FCC and ACS will take part as members of two of the three consortia that have expressed an interest. FCC will take part in the tender through its German subsidiary Hochtief, and it infrastructures division Iridium, within the consortium led by BAM Nuttal of the UK. Meanwhile, ACS will be part of the Bilfinger and Macquarie consortium through its subsidiary Globalvia
    Read More
  • Northern Spire wins award from UK’s Association for Project Management
    November 30, 2018
    The Northern Spire bridge in Sunderland, northern England, has beaten off stiff competition to win another national construction and engineering award. The Spire, which opened in August this year at a cost of €132 million, was named Project of the Year: Engineering, Construction and Infrastructure 2018 by the UK’s Association for Project Management. The award is the latest honour for Sunderland’s 105m-tall cable-stayed bridge which links Castletown on the north side of the River Wear with Pallion.
    Read More
  • Stantec: coming to an infrastructure site near you
    April 13, 2017
    Acquisitive Canadian firm Stantec is snapping up more transportation expertise as it moves out of its home North American market. David Arminas reports. Last December, politicians from the US states of Kentucky and Indiana celebrated the opening of the second of two major bridges. A ribbon-cutting ceremony took place in cold wintry weather on the new 762m-long cable-stayed Lewis and Clark Bridge. The event marked the finish of the prestigious three-and-half-year Ohio River Bridges Project.
    Read More
  • Tackling the UK's traffic congestion
    February 28, 2012
    The biggest problem on UK roads is congestion, and there is no shortage of ideas as to how it should be tackled. Patrick Smith reports. Congestion (and how to relieve it), along with safety, are among the top priorities facing those responsible for looking after the UK's roads. Road pricing, car-share lanes, greener vehicle initiatives and alternative methods of transport such as buses, trams and rail are all part of the approach, but prior to the current economic climate the nation's love affair with the c
    Read More

Highlighted Content