Coltbridge Viaduct

Coltbridge Viaduct is part of a disused Victorian railway line, located in the Roseburn/Murrayfield area of Edinburgh. The triple-arched viaduct spans the Water of Leith, Coltbridge Avenue and the Water of Leith Walkway.

The integrity of the structure was being compromised by the growth of vegetation and erosion of mortar on the underside of the arches, causing risk of falling debris.

The scope comprised:
• Vegetation removal
• Drainage
• Masonry repairs
• Waterproofing
• Extensive scaffolding
• Other refurbishment works

Marlow Flood Alleviation Scheme

Marlow’s enviable location on the banks of the River Thames in Buckinghamshire has been both a blessing and a curse for the picturesque town in recent years, with residents and businesses suffering from numerous instances of flooding. Most notably, this was in 2014 when 23 properties were flooded.

The Environment Agency identified that there were a total of 287 properties, which were “at risk” of river flooding in the town. To enable the completion of the wider Marlow Flood Alleviation Scheme, Barhale were selected to deliver advanced protection works on the river bank to the south east of the town.

INTU Lakeside Enabling Works

To facilitate a new 225,000 square foot extension to the INTU Lakeside shopping centre in Essex, Barhale were required to divert existing utility services away from the new building footprint by carrying out extensive open cut excavation.

The new extension will act as a focal point for the shopping centre, housing numerous leisure facilities including; a bowling alley, various food and drink outlets and an interactive family entertainment centre.

There were three existing services, which clashed with the footprint of
the new building:
• Potable water main
• Gas main
• HV electricity ducting

London Sustainable Industries Park

Barhale have successfully completed a £1.38m design and build
contract for the Greater London Authority (GLA) at Dagenham
Dock in East London. As part of a regeneration scheme for unused
industrial land, the GLA are selling serviced plots of land within the
Mayor of London’s first clean technology commercial park.

An important part of the regeneration required upgrading the
local sewerage infrastructure. Along with our design partner, GHA
Livigunn, Barhale were engaged to design and construct a 6m
diameter x 14m deep, segmental caisson pumping station, including
associated MEICA installations with two 66 l/sec pumps.

Downtown Road Sewer Diversion Works

Barratt Developments sought to construct a block of low rise houses in the Rothershide area of London. To achieve this, the existing foul and storm trunk sewers, that were running across the centre of the site, needed to be diverted to the perimeter. The work comprised the installation of clay and concrete pipes for the new route and the forming of “on-line” manholes through which to break into the existing sewers, in order to divert the flows. Once diverted, the old sewers were abandoned. The Client provided a design that showed the new route. Flows were maintained within the sewers throughout the duration of the project.

Battersea Power Station – Foul Water Connection

In Battersea, the Barhale team were able to draw upon their wealth of tunnelling experience, to develop innovative solutions to mitigate un-foreseen changes to the scope of works. Their proactive approach to potential problems saved the client time and money in delivering a very tight programme.

Following the excavation of the reception cofferdam; designed to enable retrieval of the tunnelling boring machine (TBM), it was established that the existing sewer was not in the location shown on the drawings. Also, the area surrounding the sewer was overlaid by a dense zone of utility services including an Extra High Voltage (EHV) trough and large diameter portable water mains; consequently it was no longer possible to retrieve the tunnel boring machine from the cofferdam.


Abbey Wood Station Civils and Drainage Works

The opening of the new train station building at Abbey Wood was an important milestone for The Crossrail Project as it was a step closer to the introduction of the Elizabeth line services. Abbey Wood is one of ten new Elizabeth line stations, providing passengers with a direct link through central London to new destinations.

As part of the Abbey Wood project, Barhale were required to undertake a series of phased drainage, utility and highway works at the newly constructed Crossrail Station (involving working alongside live rail lines) and within the surrounding streets due to requirements for public footpaths and access to the innovative station building.

A number of drainage runs and manholes were required to be constructed on both sides of the new station to serve the station connecting to the existing surface water and sewer drainage system.

Crossrail Farringdon Station Upgrade

As part of upgrades carried out at Crossrail Farringdon Station, Barhale were engaged by Bam Ferrovial Kier (BFK JV) to carry out trial holes, organise and excavate for the installation of bollards at both ends of Cowcross Street. This is located in the heart of London, in an area frequented by thousands of visitors on a daily basis and in the midst of busy traffic and local businesses. Moreover, the trial holes and excavations took place in areas congested with live services, owned by a diversity of utilities companies (BT, Virgin Media, Vodafone, UKPN, Thames Water, Cadent Gas).

To address these challenges, Barhale took a proactive approach that emphasised exemplary collaboration and stakeholder management. As a result, Barhale provided several design solutions to overcome numerous site restrictions. Barhale also ensured that third party assets were successfully diverted following a strict delivery programme.

Finally, hand-digging and non-obtrusive techniques ensured that the excavations were carried out with zero accidents and cable strikes, despite the heavy presence of live services.