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.
In order to solve a potential ammonia issue at Stanbridgeford Sewage Treatment Works (STW), Barhale’s team with Anglian Water’s IOS programme have installed a new biological tertiary treatment plant to remove additional ammonia.
The new plant consisted of:
• 12 no. SAF units which were constructed off site
• 2 no. 7.5kw feed pumps and 2 no. 11 kw blowers
• A new MCC kiosk and PLC which were constructed off site
• Utilising the existing feed well and drying bed slab
In their component parts, the elements are fairly standard pieces of equipment which can be found on sewerage works around the country. The way in which the Barhale team have brought the pieces of the plant together however, and some of the specific nuances of the design, has made the solution particularly innovative.
Barhale’s team in Scotland successfully delivered all civil works,
including a new access road and substation platform, at the new
Chipperlaigan GIB compound in Ayrshire, Scotland for Iberdrola
Engineering and Construction.
The works were required to facilitate Iberdrola’s need to upgrade
their Kilmarnock to Coylton circuit. This overhead line cable circuit
runs north to south between Kilmarnock and Coylton with a ‘tee’
connection at the Chipperlaigan site, which enables the circuit to link
to the town of Ayr in the west. To accommodate a required increase
in load flow, the existing cable at Chipperlaigan was replaced with a
275kV Gas Insulated Busbar (GIB) arrangement.
Barhale, on behalf of Thames Water/Optimise, re- laid trunk sewers
at Wembley as a result of a number of new developments within the
catchment surrounding Wembley Stadium. The works were to resolve
flooding, which had been occurring and prevent future flood events
as a result of 1 in 30 year storms. The scheme, which commenced in
May and was completed in December 2015.
Wembley Stadium and its surrounding environment is a very busy
pedestrian traffic route. This level of pedestrian traffic proved to be a big
challenge facing the project especially as there were numerous events
that took place at the Stadium and the neighbouring Wembley Arena.
To protect members of the public and minimise disruption to them,
strategic planning of the work area was required.
To facilitate a grid connection for a proposed wind farm, Barhale were
tasked with the construction of a new substation control building and
associated civil works. Works took place to the west of the village of
Douglas in South Lanarkshire.
The new substation control building was a single story steel portal
frame structure, which was constructed on top of a reinforced
concrete floor slab. External facing bricks were constructed to a
defined level, in front of which an insulated aluminium cladding
façade was attached to the frame to provide the external walls. The
same cladding was attached to the top of the steel portal frame to
construct the roof structure.
As part of upgrades to the waste water treatment system at Woburn Forest Center Parcs, Barhale were contracted by ACWA to construct a new 1200m3 balance tank and undertake associated civils. The increased tank capacity will provide operational and emergency resilience for expanded village facilities, which includes 57 luxury accommodation lodges at the popular holiday site.
Despite challenging conditions, which included cold winter weather, working in an area adjacent to guest accommodation, and modifications to the initial scope that increased the volume of work, the Barhale team finished the work within cost and programme, and in accordance with all technical standards.
To facilitate the connection of the new Aikengall II Windfarm, the existing Crystal Rig 400/132kV Substation in East Lothian needed to be extended. This was done through the construction of a new 132kV substation at Westerdod and the installation of a 132kV cable between both substation sites. Barhale were engaged by Iberdrola Engineering and Construction (IEC) to deliver a new control building and all associated civil works.
The Barhale team were tasked with delivering all civil works associated
with the new 132kV substation; prior to the installation of all electrical
equipment by a third party ‘Balance of Plant’ contractor.
Barhale were awarded the scheme by Thames Water to alleviate flooding within the Bayswater area of London.
The scheme involved the connection of the existing Victorian sewers to a new pumping station from which discharge would be carried via a new rising main to another existing brick built egg shaped sewer.
The pumping station was designed for storage of a 1 in 15 year storm. Discharge passed through a reinforced concrete valve chamber some 6m long, 3m wide and 3m deep, to a 600mm concrete outlet pipe laid in open cut trenches to the existing Victorian brick built sewer at Inverness Terrace, a narrow road with a number of Embassies to one side.
During a recent project at Turnham Green Tube Station for FM Conway, on behalf of London Underground (LU), Barhale were able to demonstrate how Early Contractor Involvement (ECI) enabled the development of a realistic and successful cost plan. This in turn led to collaborative interaction at design stages and the delivery of a successful project in line with the agreed cost.
The scope of works required excavation of the existing rail embankment under the six arches and installation of extensive temporary works formed by sheet piles braced by frames against the viaduct wall.
This was a high risk project. The works would be taking place in a restricted area with limited head-room, and in very close proximity to live railway lines (District Line and Piccadilly Line on the Underground network).
As part of Anglian Water’s Integrated Operational Solutions (IOS) programme, Barhale have delivered a new Booster Pumping Station in Silverstone, Northamptonshire. This is to help meet the increased demand in water supply that occurs intermittently throughout the year when events are held at the nearby race circuit.
This is especially important during the British Grand Prix weekend in July. Each year the drastic increase in water demand puts a tremendous strain on the existing water network. This is caused by nearly 400,000 members of the public who visit the circuit over the three days and the many thousands more who camp in the surrounding areas in the week leading up to the event.