Water and Utilities 1
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Water and utilities

Supporting our customers as they deliver essential services

MGF have vast experience in delivering shoring solutions to the water and utilities sectors, including supply to the Water Companies for their AMP programmes which accounts for around a third of our business.

For planned works, our early involvement with customers enables us to provide value engineered design solutions balancing safety and practicality. Such schemes can range from smaller trench support systems utilising steel trench sheets and manhole brace to larger cofferdams, often with complicated geometry, utilising trench sheets or sheet piles and heavy duty hydraulic bracing and hydraulic struts.

Reactive works are usually smaller scale excavations, often in restricted site conditions with very limited planning time available, therefore trench support tends to be provided by trench boxes, manhole boxes, drag boxes, vertishore and trench sheets with walers and struts or manhole braces.

It is in this arena where MGF’s logistical agility provides maximum impact to the customer through fast response times.

Furthermore our innovative approach to product design means that we have the capability to assist our customers in overcoming the challenges they face, for example our GRiPSHORE range has been developed predominantly to satisfy the needs of the reactive utilities market as GRP is safe to use for electrical works and it is light enough to be handled manually.

Case Studies

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Case Study: Louisiana Public House, Bristol

Project: Victorian sewer repair

Client: Wessex Water

An impressive excavation to upgrade a Victorian sewerage system proved to be more complicated than usual for client Wessex Water. The 4-metre-deep trench was excavated by hand to the rear of one of Bristol’s historic landmarks – the Louisiana Public House.

The Louisiana was built to cater for travellers brought to the area by the construction of the Basin, part of the Floating Harbour. Fast forward 200 years and the ...

On: 5 Jun, 2019By: MGF
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Case Study: Alleviating flooding at Beaumaris Castle

To alleviate the flooding in Beaumaris, John Kelly Construction were contracted to install a surface water drainage system.
The project required the contractor to excavate within 25m of Beaumaris Castle – a UNESCO World Heritage Site and one of the best examples of 13th and 14th century architecture in Europe attracting over 100,000 visitors last year.
Faced with the challenge of installing 600m of 1.5m diameter polypipe in 6m sections between existing manholes, John Kelly Construction spent time researching the ...

On: 25 Apr, 2019By: MGF
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Case Study: River Humber Pipeline Replacement

The River Humber pipeline is an important pipeline – connecting an import location for gas at Easington, on the East Yorkshire coast, to the national network – delivering gas supplies to millions of households throughout the UK.
The original pipeline, Feeder 9, is buried in a cut-and-cover trench under the river bed where tidal patterns have eroded the river bed covering the pipeline. Remedial work was undertaken to provide a short-term solution while a long-term solution was developed.
National Grid, ...

On: 14 Aug, 2018By: MGF
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Case Study: Wessex Water Upgrade Bridgwater Water Supply Grid

Excavation works began in early 2017 at the Dancing Hill Reservoir site as part of a £6 million project to upgrade the water supply grid for Bridgwater and the surrounding areas. Major upgrades are required due to large-scale developments in the area.
The on-going project currently has four connected cofferdams in place allowing safe working space to combine new pipeworks to the main reservoir tank. Multiple back-to-back 203UC tank braces with special alignment of bracing has been key in the ...

On: 1 May, 2018By: MGF
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Case Study – Rapid Gravity Filter (RGF) Replacement, Derbyshire

New RGF Installation Saves £500,000
Main Contractor: Severn Trent Water
Long-standing clients Severn Trent Water were tasked with the refurbishment of six Rapid Gravity Filters (RGF) in Bamford, Derbyshire, as part of a £5 million design and build contract.
Contractors Stantec Treatment (formerly MWH Treatment Ltd) put forward a case to build two brand new RGF’s rather than refurbish the six filter systems currently in service. Stantec demonstrated it’d be considerably cheaper and would provide an improved service.
The solution ...

On: 14 Feb, 2018By: MGF
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Rising Main Replacement with GRiPSHORE at Wigton Road, Leeds

Project: A project to replace a section of existing cast iron rising main in Leeds ‘Millionaire’s Row’ has called for MGF’s latest lightweight technology.
Customer: In Depth Civil Engineering and Barhale
As part of the Yorkshire Water AMP 6 programme, the MGF Yorkshire Depot supported Barhale to safely undertake the replacement of 930m of an existing rising main along Wigton Lane in Leeds, using the innovative safety solution GRiPSHORETM
GRiPSHORETM is MGF’s new lightweight shoring range which combines GRP (Glass Reinforced ...

On: 1 Dec, 2016By: MGF
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Case Study – Water Treatment Works at Hyndburn

Project: Waste Water Treatments Works at Hyndburn
Customer: United Utilities
Main Contractor: HMB Alliance

In 2003 the HMB Alliance were upgrading Hyndburn WwTW at Great Harwood, as part of a £10 million water treatment project. This required a 14.0m long, 3.0m wide, 10.0m deep trench to carry large pipe runs from the main settlement tank.
Aside from the high loadings generated by the fairly poor ground conditions (granular fill with a mid-level water table) and the huge depth, the ...

On: 24 Feb, 2016By: MGF
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Case Study – Water Treatment Works at Hurleston

Project: Water Treatment Works at Hurleston
Customer: United Utilities
Main Contractor: Balfour Beatty

In 2003, Balfour Beatty Construction were in the process of upgrading Hurleston WTW, located just north of Nantwich off the A51, as part of a £6 million design and build contract. A major part of the contract was the construction of a new Clean Backwash/Interstage Pump/Sump Tank, alongside an existing 2-storey Control Building.
This required the installation of a temporary cofferdam, 25.2m x 14.4m x 5.0m ...

On: 24 Feb, 2016By: MGF
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Case Study – Vyrnwy LDTM Project

Vyrnwy Large Diameter Trunk Main Project
Project: Vyrnwy Large Diameter Trunk Main Project
Customer: Balfour Beatty Utilities

The Vyrnwy Large Diameter Trunk Main (LDTM) consists of three parallel pipelines with a total combined length of around 240km. These large mains carry up to 210 million litres of water a day from, Lake Vyrnwy, to 900,000 people in Cheshire and Merseyside.
Over the project, MGF teams across multiple locations have demonstrated the ‘one team’ service excellence to deliver the temporary ...

On: 24 Feb, 2016By: MGF
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Case Study – Sewer Replacement in Shallow Trench GRiPSHORE

Sector: Water and Utilities
Client: South West Water
Contractor: R & M Utility and Civil Engineering Services
Location: St Johns Road, Exmouth
Scheme: 600mm Diameter Sewer Replacement
MGF Depot: Exeter
Products hired: GRiPSHORE™ 500mm GRP Vertishore rails with aluminium hydraulic struts

Scope of works:
R&M were contracted by Balfour Beatty to replace a 140m sewer run in Exmouth, Devon. The works required a full road closure and the route was highly congested with services.
R&M were having difficulty identifying ...

On: 24 Feb, 2016By: MGF
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Case Study – King Posts at Buckton Castle

Project: King Posts at Buckton Castle, Stalybridge
Customer: United Utilities
Main Contractor: KMI

In 2002, a joint venture between Kier, Murphy and Interserve were constructing a new £4.7 million filtration system at a water treatment works in Oldham, as part of a £300 million framework deal awarded by United Utilities.
This required a 4.0m deep excavation with a perimeter of approximately 46 metres in total. The location of the excavation cut into the side of a fairly steep hill, ...

On: 24 Feb, 2016By: MGF
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Case Study – Hornsey Water Treatment Works London

Project: Hornsey Water Treatment Works, London
Customer: Thames Water

As part of their AMP4 programme Costain asked MGF to design and supply numerous temporary works solutions for seven schemes on a large WTW improvement scheme. The largest and perhaps most challenging schemes on the site was the Lamella Building excavation.
The 7.4m deep excavation measured 58.3m x 17.4m and was adjacent to a river and reservoir, therefore is was essential that ground movement was kept to a minimum and ...

On: 24 Feb, 2016By: MGF

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