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126 concrete wall units, 132 beams, 120 columns and 400 roof slabs were all pre-cast in factory conditions away from Jacksons Edge before being delivered to site and carefully crane-lifted into place. At Whitlingham we drove a number of savings, including the reuse of material used for the temporary works within the permanent works as sub-base for the structures and access roads. In Blackpool we are helping improve the bathing water quality by increasing the capacity of the sewerage network and reducing the volume of surface water entering the sewer system.

Water and wastewater

Work in the water and wastewater sector is probably what we are most well-known for within the construction and civil engineering industry; our experience in this sector spans our entire history.

Innovation is central to our operations to drive continuous improvements, saving time, money and reducing project risk.

An extremely successful AMP6 bidding period saw us maintain our long-standing relationships with Yorkshire Water, Severn Trent Water and Northumbrian Water Group, as well as establish new long-standing framework relationships with United Utilities, Anglian Water and Dŵr Cymru Welsh Water.

In recent years we have also worked with other water and wastewater clients including Scottish Water, Cambridge Water and Essex & Suffolk Water.

With a clear focus on delivering value for our customers, we work across the full spectrum of capital works in the water industry – from source to tap and sink to river.

We are able to complete projects to the highest standards with a full understanding of the regulatory environment in which our clients operate.

Most of the work that we undertake in the water and wastewater sector is delivered on a feasibility, design and construction basis through our joint venture, Mott MacDonald Bentley (MMB).

Grafham Resilience

In Cambridgeshire, we constructed a new 40 megalitre service reservoir and associated infrastructure - one of the largest schemes in our history.

The project, which is the largest precast concrete reservoir in the UK, provides resilience to Grafham Water Treatment Works.

In a ‘resilience event’, the final solution will enable flows in the existing trunk main to be reversed, re-zoning the entire network and ensuring continuity of supply.

126 concrete wall units, 132 beams, 120 columns and 400 roof slabs were all pre-cast in factory conditions away from Jacksons Edge before being delivered to site and carefully crane-lifted into place.

Jacksons Edge

We have constructed a new 18ML twin-compartment service reservoir with 1.4km scour pipeline in Disley, Cheshire, using pre-cast concrete technology.

Minimising disruption to the local community is particularly important at Jacksons Edge. To manage this, the programme has been expedited, and by using ‘productisation’ – manufacturing off-site – we are further reducing the length of time we are actually required on site.

Covenham to Boston

In 2013 we brought to a close the construction of the Covenham to Boston Pipeline, a 61km polyethylene pipeline running across Lincolnshire.

The 27 million litres per day transfer pipeline was required to address a water supply/demand deficit in the growing town of Boston in Lincolnshire. By reusing and improving existing assets – and providing new assets – the water supply for a population forecast to reach 101,000 by 2035 has been secured.

At Rivelin Water Treatment Works we are constructing seven new clarifiers, three new rapid gravity filters, extending the washwater recovery facilities and replacing existing filter media as part of a large scheme set for completion in 2018.

Rivelin Siroflec

At Rivelin Water Treatment Works we are constructing seven new clarifiers, three new rapid gravity filters, extending the washwater recovery facilities and replacing existing filter media.

The project will improve the water treatment process for to up to 250,000 Yorkshire Water customers in the Sheffield area.

110,000 tonnes of earth and stone were excavated to create room for the base for the new treatment building. This material will be re-used to almost entirely bury the new clarifier building; this will minimise the visual impact on the surrounding Rivelin Valley, which lies adjacent to the Peak District National Park.

Our team carrying out a project at Butterley Reservoir dealt with much scrutiny from the public and media in their delivery of refurbishments to a listed spillway, first built in 1906.

Butterley IRE

Our team carrying out a project at Butterley Reservoir dealt with much scrutiny from the public and media in their delivery of refurbishments to a listed spillway, first built in 1906.

Initial objections were raised when our client announced plans to make safe the only Grade II listed Victorian spillway in the country. Popular with tourists, the spillway controls the flow of water from the reservoir, safely ensuring it does not overtop and damage or erode the embankment.

By using sympathetic design and construction methods and engaging with the local community, supporting local events and schools, the team has alleviated initial concerns and now, once complete, the improvements to the spillway will help maintain its legacy long into the future.
Local dignitaries, including Jason McCartney MP, praised the high standards on site and the communications and community engagement efforts were recognised at the prestigious Chartered Institute of Public Relations awards.

Our upgrade of Worksop Sewage Treatment Works was delivered as
part of an 'alliance' between four framework contractors and Severn Trent Water, helping to deliver greater efficiencies.

e5 Alliance

We were a member of Severn Trent Water’s successful e5 Major Projects Programme – an alliance formed between four framework contractors and STW to eleven major projects.

The programme was successful as each contractor worked collaboratively with one-another to maximise available efficiencies in delivery (after all, the ‘e’ in e5 stands for ‘efficiency’!).

For ourselves, the overall e5 Major Projects Programme comprised three projects, worth a total of nearly £50 million to MMB. We have expanded the sewage treatment works at Rushmoor, installed a new activated sludge plant at Strongford Sewage Treatment Works and significantly upgraded Worksop Sewage Treatment Works.

We are currently on site constructing the new North Wales Sludge Treatment Centre at Five Fords Wastewater Treatment Works.  The site will receive dewatered sludge from satellite sites across North Wales, bringing our client’s sludge assets in North Wales in line with their assets in the south of the country.

Five Fords WwTW

We are currently on site constructing the new North Wales Sludge Treatment Centre at Five Fords Wastewater Treatment Works. The site will receive dewatered sludge from satellite sites across North Wales, bringing our client’s sludge assets in North Wales in line with their assets in the south of the country.

Working closely with the client we challenged original proposals for two sites in North Wales, developing a proposal for just one site that still achieves the aims of the project. This new solution reduced costs by £15m.

Dŵr Cymru Welsh Water will be able to return bio-gas produced by the new facility to the grid through an existing plant on site, providing them with an income into the future.

This project at Baitings Reservoir saw us marry our knowledge of the water industry with our highways expertise.  We replaced the 105m bridge deck and constructed new bearings.

Baitings IRE

We replaced a 105m long bridge deck at Baitings Impounding Reservoir to ensure the 60-year-old, seven span structure over the reservoir remains safe for highway traffic for future generations.

We began by removing the existing bridge deck to enable us to undertake remedial work to repair existing piers and abutments, before replacing the deck with a new pre-cast, pre-stressed beam bridge deck solution.

The project gave us opportunity to marry our knowledge of IRE sites with our highways and bridge experience, a sector in which we have worked since the 1980s. Given the nature of the site, we constructed a temporary floating pontoon to house the 90t crane required to lift and remove the existing 82 bridge beams, and lift into place 35 bridge beams and a further 28 parapet beam sections for the new bridge deck.

The project picked up the prestigious CECA Yorkshire and Humber ‘Contract of the Year’ award for schemes under £2million and was commended for the way an old bridge deck was refurbished and replaced at the ICE Yorkshire and Humber Awards.

At Whitlingham we drove a number of savings, including the reuse of material used for the temporary works within the permanent works as sub-base for the structures and access roads.

Whitlingham

We have constructed and commissioned a new sludge cake reception facility at Whitlingham Water Recycling Centre in East Anglia.

The scheme has combined civil, mechanical and electrical elements associated with new buildings, MCC, odour control units, storage silo and connecting pipework. The site team have driven a number of savings, including the reuse of material used for the temporary piling mat within the permanent works as sub-base material for the structures and access roads.

In recent years we’ve delivered a number of different programmes of work with Northumbrian Water, including a series of works to upgrade security across their operational assets.  
Working in a truly collaborative fully-integrated manner with Northumbrian Water, the asset database was broken down into batches so that the security improvement works could be delivered in the most efficient manner.

Minor Works Programme

In recent years we have become adept at delivering programmes of minor works collaboratively with our clients, none more so than with Northumbrian Water. We deliver a number of sub-programmes across their operating regions, including the Minor Works Sub-Programme.

Here we resolve wastewater compliance issues, working in an agile way with the client and suppliers to react quickly and provide safe, cost-effective solutions.

Each scheme under the programme is delivered for under £150,000. Key to its success is engagement with all parties from the start: the ‘One Team’ approach. The whole team plans the works collaboratively, and there is a drive to continuously improve delivery by taking learning and standard designs from one scheme to the next.

We estimate that by taking this approach we have achieved efficiencies of over £1.1million over the course of the programme.

The design and build of a new 5.5ML distribution service reservoir and 3.1km pipeline at Cowleigh sees us working in and around the popular spa town of Malvern, and in the Malvern Hills, an Area of Outstanding Natural Beauty (AONB).

Cowleigh DSR

The design and build of a new 5.5ML distribution service reservoir and 3.1km pipeline at Cowleigh sees us working in and around the popular spa town of Malvern, and in the Malvern Hills, an Area of Outstanding Natural Beauty (AONB). This has influenced a number of our decisions in the development of the project.

The design takes into account a natural fault line within the rock formation, and the route of the pipeline is designed to minimise our impact. Our choice of materials has also been influenced: not only does the use of Molecur plastic pipes reduce costs, it reduces the need for mechanical lifting and can be cut using a handsaw rather than power tools. This lessens our impact on our surroundings, and reduces safety risks.

We’ve been proactive with the community too, hosting a public exhibition prior to starting on site and engaging with local residents whilst laying the pipeline through the streets of Malvern, keeping them up-to-date with progress.

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