Case Studies

A new reservoir, conditioning plant and associated low-carbon pipework to ensure resilience of supply without stressing local water sources

The installation of a new reinforcement main, upgraded pressure management systems and improved network flexibility to resolve peak‑demand issues

River Tyne eel screen installation ensures that the raw water abstraction station complies with The Eels (England and Wales) Regulations 2009

Implementation of a strategic and meticulously planned solution to divert eight water mains to enable the construction of a new dual carriageway

Water treatment works upgrade utilising advanced modular ozonated ceramic membrane technology

Water resource management plan to help combat the risk of shortages, boosting resilience and securing water supplies across the East of England

Filter upgrade project: reviews, assessments, upgrading and replacement of operationally critical equipment at a major water treatment plant

Repairs to cracks and joints at a key reservoir to restore structural stability by preventing water infiltration and reducing the risk of leaks or failures

Water zone management to provide security of supply, improve resilience and upgrade of strategic infrastructure across the North-East region of the province

Complying with the Eels (England and Wales) Regulations 2009 at the raw water intake for Pitsford WTW

Providing Uiscé Éireann with additional flexibility in addressing water compliance issues and production shortfalls during upgrade works

Innovative engineering and sustainable practices to aid delivery of ceramic membrane plant upgrade

Optimising treatment processes to remove the risk of the formation of increased trihalomethanes and increasing the works output by over 75%

Installation of more than 12km of 900mm diameter ductile iron water main & a new pumping station ensures resilience of supply for 1 million customers

A comprehensive upgrade of water intake, treatment, and distribution to secure long-term supply

20km pipeline to balance the water levels in both Abberton and Hanningfield Reservoirs and ensure resilience of supply in the Essex Resource Zone

Ensuring security of a safe, sustainable supply of water to the Longwood Water Supply Zone

Safe, efficient construction of a new water booster station providing network resilience

Rehabilitation of a deep underground trunk main using innovative lining method

Enhancing water quality and resilience through strategic investment

Reservoir expansion and on-site electro-chlorination plant to enhance storage, resilience, and sustainability for the Greater Dublin Area’s water supply

Flood resilience upgrades to protect assets in the event of a 1-in-30-year storm

Ensuring continuous operation of during periods of unusually low raw water pH following heavy rainfall

£4.3m treatability improvements project to upgrade existing water treatment processes and fully modernise operations

Scheme solution optioneering, selection and development for potable water trunk mains to support the Water for Life Hampshire programme

Tackling discolouration issues through innovative manganese filtration and process redesign to enhance network water quality

Strengthening the resilience of the water supply network for Severn Trent by addressing a critical operational vulnerability with a reliable secondary source

Innovative air pigging technique to clean a 130-year-old pipeline reduces costs, water use, carbon emissions & environmental impacts

Replacement of the backwash system fundamental to the treatment process, delivered through collaborative working with all delivery partners

The challenges of designing and constructing the Witches Oak programme of works on multiple sites to a condensed timescale

Installation of new control system replacing a 30 year-old existing system across four sites located in Argyll

Ceramic membrane technology and modular build deliveries innovative solution that provides significant benefits and efficiencies

£30m upgrade to enhance water treatment and distribution in Central Borders for improved quality and reliability for local communities

Installation of new 450mm trunk main to provide an effective and sustainable supply to a population of 17,500 (and increasing) across Derry City

The removal of two reservoirs from the Reservoir Act

Embsay Water Treatment Works is a standalone 24 ML/d water treatment works operated by Yorkshire Water (YW) and located in the Yorkshire Dales National Park, providing clean water to over 15,000 people in Skipton and surrounding areas. The existing works comprises of clarifiers, rapid gravity filters and a chlorine contact tank with associated chemical dosing. […]

Delivering the successful design and construction of a large diameter emergency drawdown siphon at one of Yorkshire Water’s largest reservoirs

Newly constructed spillway to future-proof a major 18th century reservoir

Design and construction of new 2.1 MLD water treatment works, while maintaining operation of adjacent, outdated plant

New £6.5m water storage tank completed on schedule replacing 90 year-old asset

Grade II listed structure that underwent refurbishment to address safety concerns in the draw-off tower and spillway

A testament to engineering prowess and safety excellence

Design and construction of a new run to waste system and attenuation lagoon to protect water quality

Replacement of non-compliant intake screens with new complaint Intralox eel screens including the associated infrastructure & MEICA work

Update on construction of a large diameter strategic water main including a challenging crossing of the River Tees

Removing manganese and iron through the first UK water industry application of jet mixing for coagulant mixing at a water treatment works

Breaking the reactive cycle to move towards a proactive future

Design and construction of a 43 ML semi-precast concrete reservoir to provide resilience in South Tyneside and Wearside

Installation of new 315mm trunk main to provide an effective and sustainable alternative water supply to Randalstown and Antrim

Clean water infrastructure pipe spray lining

A novel water treatment plant constructed on the site of an upgraded reservoir to aid Affinity Water’s environmental sustainability commitments

Refurbishment of a 90-year-old potable water storage tank in Bedfordshire without compromising water quality

Design & construction of the repairs to the lower part of the spillway, abandoned siphon recommissioning and the infill of a tunnel

West Hallington Reservoir is a Northumbrian Water Group (NWG) asset situated 1km to the northeast of the village of Colwell in the Tynedale district of Northumberland. The reservoir was constructed between 1884 and 1890 for Newcastle & Gateshead Water Company for the purpose of municipal water supply. The reservoir was built adjacent to the earlier […]

Severn Trent’s Green Recovery Programme: combining natural solutions with conventional infrastructure

The challenges of designing and constructing the Witches Oak programme of works on multiple sites to a condensed timescale

In 2015, Bournemouth Water was acquired by Pennon Group, who already owned South West Water (SWW). Alderney WTW, located in the north of Bournemouth, is a strategically important water treatment works that supply high quality drinking water to approximately 375,000 customers – nearly 75% of the homes and businesses in Bournemouth Water’s operational area. Alderney […]

Anglian Water’s Strategic Pipeline Alliance (SPA) is delivering one of the largest infrastructure projects in AMP7; a new water main network, hundreds of kilometres long, which will allow Anglian Water to move water around the region from areas of surplus to areas of deficit, future-proofing supply to customers. The network is being constructed in 11 […]

Birds Park Reservoir is no longer used for water supply and is enjoyed by the community for recreation. Constructed around 1850, the dam is an earth embankment, 45m long and 13.8m high, perched above a residential area near Kendal, Cumbria. There are no historical drawings, and limited site investigation data was available but it was […]

Bourn Reservoir is an above-ground reservoir complex located approximately five miles outside Cambridge, England. Only one tank was still operational after the other two were removed from service due to natural degradation. A new tank was required to meet demand from large-scale developments in the supply area. A review was conducted to ascertain the total […]

Clough Bottom Impounding Reservoir (IR) is an earth-fill embankment reservoir located on the eastern edge of the West Pennine Moors, around 4km north east of Rawtenstall, Lancashire. The reservoir is currently used for public water supply and compensation flows. The reservoir was formed by the construction of an earth embankment across the Whitewell Brook and […]

NI Water’s Derg Water Treatment Works (WTW) is located in the north-west of Northern Ireland and produces on average 20 Ml/day, supplying water to approximately 10,000 homes to a wide area including Castlederg, Strabane, Omagh and their associated rural areas.  In recent years there have been multiple exceedances of the pesticide, MCPA [(4-Chloro-2-methylphenoxy) acetic acid], […]

Newly commissioned treatment centre providing high quality drinking water to 44,500 customers in Somerset

The water network in the western end of the Thames Valley Supply Area is dominated by local borehole water sources. Over time, population growth coupled with general environmental drivers to reduce reliance on groundwater sources in sensitive chalk stream areas, Thames Water has sought to improve supply resilience and deployable output by linking local sources […]

Hampton Loade WTW treats raw water from Chelmarsh Reservoir, located approximately two miles north-west of the site. The reservoir is supplied by the river intake pumps located within the intake building immediately adjacent to the River Severn. The maximum flow that can gravitate to the works from the reservoir is 130-135 megalitres/day (MLD). To increase […]

Located 5 miles south of Chelmsford, Hanningfield Water Treatment Works (WTW) is the largest works operated by Essex & Suffolk Water (ESW). The WTW, which has a peak output of 220 MLD, draws water from the 26,000 ML Hanningfield Reservoir to supply a large part of south Essex. The washwater system is over 50 years […]

South West Water’s (SWW) Hingston Down Reservoir site is located on an exposed Cornish hilltop and contains two service reservoirs which supply nearby villages with potable water. Originally there was only one reservoir at the site and there was no way of being able to take it out of service for cleaning, so a Braithwaite […]

Forming part of Southern Water’s (SW) Hampshire supply region, the Isle of Wight (IoW) is located just off the south coast of England and is divided into two water distribution zones (WDZ), namely IoW North and IoW South. The IoW South comprises major towns of Ryde, Sandown, Shanklin and Ventnor with multiple villages and more […]

King George V Reservoir (KGV) is an operational raw water storage reservoir located in the Lea Valley at Walthamstow and is a Site of Special Scientific Interest (SSSI) with restricted access. It is controlled by Thames Water’s Lea Valley/North London Abstraction Group based at Coppermills AWTW. Seepage through the clay core at the north-east of […]

Kinnerley WTW is located in rural Shropshire, approximately 10 miles north-east of Shrewsbury. The site treats around 4 Ml/d from a single groundwater source, after which it is pumped to Pant DSR to supply. The existing water treatment process on site includes two aeration towers, chlorine gas, three iron and manganese pressure filters, a balance […]

Essex and Suffolk Water, part of Northumbrian Water Ltd, supplies drinking water to 794,000 properties. Maintaining a supply to those customers requires the distribution of up to 670 Ml/d of high-quality drinking water. In Essex, the two primary treatment works are Hanningfield WTW, a physio-chemical works near Chelmsford and Layer WTW, a biological works, near […]

Lee Road Water Treatment Plant (WTP) provides approximately 70% of Cork City’s total treated water supply. Water is taken from the River Lee, treated and then pumped to reservoirs in the north-west of the city through a system of rising mains. Water is distributed to consumers throughout the city via a network of gravity distribution […]

Littlehempston is a large complex potable water treatment works located near Totnes, South Devon, which has multiple river and reservoir sources. It supplies circa 78,000 properties to an area that includes Torbay, Newton Abbot and Kingsbridge. The original treatment works comprises flat bottom clarifiers (FBC) and rapid gravity filters (RGF), with an additional process stream […]

Located near Maerdy in South Wales, Lluest Wen Reservoir is a Category A Large Raised Reservoir as defined by the Reservoirs Act 1975. The reservoir is impounded by a 200m long, 25m high earth embankment dam across the Rhondda Fach River and currently impounds 1.07Mm3 of water. Construction of the reservoir was originally completed in […]

Lower Barden Reservoir is the lower of two reservoirs located near Bolton Abbey within the Yorkshire Dales National Park. The reservoir is an impounding reservoir with a crest length of approximately 640m and a maximum height of 28m with a capacity of 2.23 Mm3. The overflow is located on the right-hand side of the embankment […]

Northumbrian Water’s Ovingham Raw Water Pumping Station (RWPS) is an abstraction station located on the north bank of the River Tyne in South Northumberland between the towns of Wylam and Ovingham. The station provides raw water from the River Tyne to Horsley Water Treatment Works (WTW) and the Great Southern Reservoir at Whittle Dene WTW. […]

Northern Ireland Water’s Cushendall Water Pumping Station (WPS) is housed on the outer perimeter of Dundonnell Water Treatment Works (WTW) situated on the outskirts of Cargan village in the middle of County Antrim. The WPS solely supplies Parkmore Service Reservoir (SR) with potable drinking water, which in turn gravity feeds three other downstream SRs (Knockans, […]

The River Lyd Pumping Station is consented to abstract up to 40 Mld from its intake source at Lifton, Devon during November through to March, pumping raw water approximately 7km to Roadford Reservoir. The pumping station was last used on a full operational basis during the mid-1990s and the original equipment had remained in a […]

United Utilities and Managed Service Provider (MSP) Costain have delivered improvements to the existing spillway at Rivington Upper Impounding Reservoir in Lancashire. The team worked collaboratively, undertaking a complex construction programme in challenging conditions, while managing the operational needs of the reservoir site and popular recreational area. The main objective was to upgrade the existing […]

This project was commissioned by UK Water Industry Research (UKWIR), as part of their efforts to address one of the 12 Big Questions the UK Water Industry is facing, “How do we achieve 100% compliance with drinking water standards (at point of use) by 2050?”. Today, no more than 10% of the total incoming flows […]

Reverse Osmosis (RO) will play an essential role in helping the water industry tackle the numerous environmental and sustainability challenges it faces. Global climate change is causing increased stress on water resources around the world, and this means more reliance on desalination of brackish and sea water sources to provide drinking water security. The technology […]

Seedy Mill WTW treats surface water from the Blithfield Reservoir. The existing supply to the works is gravity-fed up to a maximum of 85 MLD. Additional yield could be provided by utilising three in-line booster pumps located at Nethertown. In addition, there are two individual borehole contributions at Seedy Mill and Trent Valley, which can […]

Upgrading the existing water treatment process with GAC and UV treatment to meet long term taste and odour targets

With approximately 60km of new 800/900mm pipeline required to replace the existing potable water mains, some of which are over 150 years old, the Tees and Central Strategic Pipeline will directly improve water quality, network resilience and operability within the Tees Network. The pipeline will serve approximately 50,000 properties and link a number of strategic […]

Tophill Low Water Treatment Works (WTW) is a 68 Ml/d water production plant situated in the East Riding of Yorkshire, approximately six miles from Driffield. The works was originally constructed in 1959 and upgraded in the 1990s to the current configuration. The treatment process presently includes pH correction, ozonation, coagulation, DAF clarification, rapid gravity filtration, […]

Ufton Nervet WTW is a groundwater treatment site located in the Kennet Valley Water Resource Zone, to the south of Reading and supplies an ‘island zone’ of approximately 12,000 properties. Groundwater is pumped through pressure filters for iron removal after which chlorine is dosed before flows enter the contact tank, which is a single cell […]

Usk is a large raised reservoir formed by an earth embankment dam, which completed constructed in 1955 with an approximate capacity of 12,268,000m3. The dam is 480m in length, with a maximum height of 31m, and supplies raw water to Bryngwyn Water Treatment Works and as well as providing compensation water to the River Usk, […]

The  Wells to Glastonbury Pipeline will ensure that approximately 13,000 customers have resilience of water supply by providing a secondary source and route to Windmill Hill Reservoir for the purposes of maintaining a safe supply of water to Glastonbury and Street in the event that the primary main from Cheddar WTW to Cooks Corner is […]

Whitehall Distribution Service Reservoir (DSR) is located on Stronsay, one of the north isles in Orkney, located 25 miles to the north of the Orkney mainland. The isle is home to 350 residents and is accessible by public ferry and plane. The Stronsay WTW that feeds the DSR is 300m to the south of the […]

In the summer of 2020, the water industry was set a challenge by its regulators to identify ways to support the country’s green economic recovery from Covid-19. Severn Trent responded with a number of proposed programmes, including Decarbonising Water Resources (DWR), the subject of this paper. The objective of the DWR programme was to provide […]

Wooler Water Treatment Works (WTW) is fed by four boreholes and supplies up to 160m3/hour of potable water to Wooler and surrounding areas, including several tourist and semi-residential holiday parks serving over 5,000 people. Seasonal fluctuation in demand can increase turbidity and increase iron and manganese concentrations in the borehole water, particularly when flows are […]

The Alston Spade Mill Pipeline project forms a key part of the United Utilities AMP7 programme and will ensure that the currently untapped resource at four local reservoirs in Lancashire is utilised and will boost the available water in the network without having an additional impact on the environment. Currently the four reservoirs have been […]

While the east of England is attracting people like no other part of the UK, it is also the driest area of the country – a threat to its success that Anglian Water is determined to overcome. The Strategic Pipeline Alliance (SPA) comprises, Farrans, Mott MacDonald Bentley, Costain and Jacobs, who are delivering one of […]

Dean Clough Lower Impounding Reservoir (IR) is a Category A, earth-fill embankment reservoir, located approximately 6km north-east of Blackburn in Lancashire. It is currently used to provide storage for public water supply. It was formed by the construction of an earth embankment across the Dean Brook river and is the lower reservoir in a cascade […]

Drumaroad Water Treatment Works (WTW) supplies water to many households throughout Northern Ireland. A 2013 report commissioned by NI Water identified the need for increased potable water storage facilities within the Drumaroad Supply Zone to reduce the risk of water shortages under certain network situations. As part of a £13m investment to modernise the existing water infrastructure […]

Faughan Raw Water Pumping Station (RWPS) is located adjacent to the River Faughan and abstracts water from the river. It provides screening by means of bar and band screens before pumping the water via a 30 inch steel raw water pumping main to Carmoney Water Treatment Works (WTW). Carmoney WTW has a minimum daily output […]

Northumbrian Water’s Fontburn Water Treatment Works is located on the outskirts of the Northumberland National Park and produces drinking water for around 50,000 homes in rural and semi-rural areas from Longhorsley and Morpeth, down through Bedlington and as far as North Shields on the River Tyne. The plant produces approximately 20 million litres of water […]

Operated by South Staffs Water (SSW), Hampton Loade Water Treatment Works is located five miles from Bridgnorth, Shropshire and supplies around 700,000 customers. Constructed in the 1960s, the site comprises the treatment works, an intake on the River Severn and a regulating reservoir at Chelmarsh which stores the abstracted river water. The river intake is […]

Hanningfield Water Treatment Works (WTW) is the largest water treatment facility operated in the Essex & Suffolk Water supply area. It has been expanded over numerous phases and is currently in need of improvements to its washwater treatment plant in response to changing influent water quality. Hanningfield WTW draws water from Hanningfield Reservoir which is, […]

Heaton Park Reservoir is located within Heaton Park, approximately 5 miles north of Manchester city centre. The reservoir is over 90 years old and has the capacity of 2,800,000m3 at top water level. The reservoir was previously used to store treated water for the Manchester Ring Main from Haweswater and Thirlmere aqueducts. However, since the […]

Northumbrian Water’s Layer Water Treatment Works is located on site at Abberton Reservoir, just outside Colchester in Essex. It is the primal source of water treatment for the reservoir and produces clean drinking water for most of the north Essex region of Essex & Suffolk Water’s operating area, with a designed output of 145 Mld. […]

The brick-built Maiden Lane Reservoir holds 67 million litres of water and supplies a population equivalent of approximately 200,000 people in north-east London.  The reservoir is located in Dartmouth Park which opened to the public in 1972 and is in the London borough of Islington.  The top of the embankment gives an open semi-panorama of […]

Matchams Raw Water Intake is located on a fast-flowing bend on the River Avon. The building was constructed c.1955, and provides a reliable source of raw water to Alderney WTW in Bournemouth. The water depths along the extraction point are typically 3-5m (relative to ‘ordinary’ water levels), with a high river flow rate, circa 3 […]

Northumbrian Water Group (NWG) have recently upgraded their clean water treatment processes at Mosswood and Lumley Water Treatment Works (WTWs). This was to increase quality and resilience of customers’ water supplies by adding ultraviolet (UV) irradiation as an extra barrier of protection. The main innovation of these projects was that they provided a vastly more […]

There is currently limited ability within the existing Northern Resource Zone to transfer water between WTW demand zones during onerous operating conditions or during a major incident at any one of the WTWs. At Carmoney WTW recent flooding at the River Faughan disabled the abstraction plant and raised the pollution risks associated with the nearby […]

Pant-yr-Eos is a large raised reservoir situated approximately 2km east of Risca in the City of Newport, Monmouthshire. It is impounded by a 27m high, 280m long embankment dam with clay core, and has a storage capacity of approximately 600 Ml. The reservoir was completed in 1878 for provision of water supplies to Newport. To […]

Papplewick Borehole Pumping Station is one of a series of pumping stations constructed during the Victorian period by Thomas Hawksley to provide clean and reliable drinking water to the city of Nottingham. When brought into operation in 1884, the steam pumping station extracted groundwater via two deep wells with an ornate housing constructed over Well […]

The construction of Plas Uchaf Reservoir was completed in 1870. It has an embankment dam that is approximately 15m high, with a puddle clay core. It has a retained capacity of 225,500m3 and a surface area of 3.5ha. The reservoir is formed across a tributary of the River Elwy, with Dolwen Reservoir located approximately 0.7km upstream of Plas […]

The Queen Elizabeth II (QEII) Reservoir is a raw water reservoir in South West London that is owned and operated by Thames Water. The reservoir holds over 19 million litres of water, equating to 10% of the raw water storage for London. Once treated, this provides clean potable drinking water for millions of people across […]

When constructed in 1979, as part of the Kielder Transfer Scheme, Riding Mill Pumping Station was the largest pumping station in Britain. Abstracting flows from the River Tyne, it enables Northumbrian Water (NWG) to transfer water from Kielder Reservoir to the Derwent, Wear and Tees rivers, whilst supporting the operation of Mosswood WTW. The site […]

Severn Trent is undertaking a programme of rehabilitation works at one its borehole pumping stations (BPS); a groundwater abstraction site consisting of three boreholes (BH1, BH2 and BH3) that provides up to 10 megalitres per day (Ml/d). The three boreholes historically operated in a duty/assist/standby configuration. The site was previously operating at below its intended […]

The Eels (England and Wales) Regulations 2009 requires an eel screen to be installed within a diversion structure capable of allowing at least 20m3 of abstraction in a 24-hour period. The focus of this programme is to protect a threatened species of fish, brook lamprey (Lampetra planeri). This eel-like ancient fish is rare in the UK […]

Swinsty Reservoir is the third in a cascade of four impounding reservoirs in the Washburn Valley, North Yorkshire. The reservoir is impounded by a 490m long, 24m high earth-fill embankment dam with a central puddle clay core, storing 3.94 million cubic metres at top water level. The overflow is located on the right-hand side (RHS) […]

In May 2018 United Utilities appointed Mott MacDonald Bentley (MMB) to deliver an NEC Option A design and construct project for the upgrade of one of their water treatment works (WTW) in the northwest of England. The project scope comprised upgrade of several key treatment processes to ensure compliance with Badenoch and Bouchier performance recommendations […]

As the UK’s largest listed water company, United Utilities aspires to ensure resilience of its network to the effects of climate change, improving the quality of wastewater effluent and providing a reliable and wholesome drinking water supply to its customers. To help drive greater efficiency and innovation in its network, United Utilities appointed Costain as […]

Wing WTW is part of the Anglian Water network, located in the county of Rutland in the East Midlands. The treatment site originally opened in 1977 and was then expanded to include a granular activated carbon (GAC) system in 1989. Morcott WTW, which was commissioned in 2010, is adjacent to Wing with a combined area […]

The Ynys-y-Fro Reservoir system is situated 1km north-east of High Cross, Newport. The system comprises two reservoirs in cascade: an upper ‘subsiding’ reservoir and a lower ‘old pond’ reservoir. The upper reservoir is immediately upstream of the lower reservoir. The lower reservoir was constructed as an earth embankment dam and was built for the supply […]

The small villages of Huisinis and Gobhaig on the Isle of Harris each consist of a few households, but in the summer months the local beach is inundated with campers and campervans. This means that the water demand fluctuates dramatically through the year. The two villages were served by single, basic supplies: Huisinis by a […]

South East Water’s Beenhams Heath WTW serves the surrounding area of Maidenhead and Bracknell. Raw water is pumped via submersible borehole pumps from two off-site locations at Hurley and Waltham. The Hurley flows are directed through a membrane filter before passing through the GACs and combining with the Waltham flows via a collecting tower and […]

Eel populations have seen a sharp decline since the 1980s and whilst the exact reasons are unknown, legislation in the form of the ‘Eels (England and Wales) Regulations 2009’ was brought in to provide eels with extra protections. Within the regulations there is a requirement to prevent eels becoming trapped within raw water abstraction systems. […]

The Ayrshire Strategic Resilience Programme involves the transfer of water from the Milngavie WTW, located north of Glasgow, to the Ayrshire and East Renfrewshire regions southwest of the city, increasing resilience for approximately one million customers. Phase 1 (Amlaird & Gorbals) was completed in 2018 and Phase 2 (Highlees) will be completed in 2021. Phase […]

Craighead WTW is a new water treatment works located on a greenfield site close to the existing works in the north-east of Scotland. The project objective is to improve the treatment of water to the customers of the town of Huntley and surrounding areas. The existing Craighead WTW has reached the end of its economic […]

Dolwen Reservoir is a Category A Large Raised Reservoir as defined under the Reservoirs Act 1975. It is located on a tributary of the River Elwy, 0.7km upstream and north of Plas Uchaf Reservoir, near Abergele, Conwy, Wales. It was constructed in 1905 and has a capacity of approximately 288,185m3. Dŵr Cymru Welsh Water commissioned […]

Wessex Water’s £50m project to upgrade Durleigh Water Treatment Centre (WTC) in Somerset is progressing on programme and within budget, despite some particular challenges posed by the Covid-19 pandemic. Work at the site near Bridgwater started in 2019. It is the largest single-value scheme delivered by Wessex Water’s Engineering & Sustainable Delivery (ESD) department and […]

Temporary abstraction of groundwater required for infrastructure construction is now a licensable activity in the UK. This article presents a series of case studies describing techniques to manage and conserve the groundwater resources beneath and surrounding a construction site, so assisting the licensing process.

The Haweswater Aqueduct (HA) was constructed by the Manchester Water Corporation between 1935 and 1955 to provide water from Haweswater Reservoir to Heaton Park Reservoir in Manchester. The aqueduct was initially designed to convey 105 million gallons per day to allow for future increase in demand and is constructed of 8’ 6” concrete lined tunnels […]

Heigham Water Treatment Works (WTW) has supplied clean water to the City of Norwich for more than 100 years. The treatment works supplied an average 42 Ml/d of water into the Norwich Public Water Supply Zone serving a population in excess of 200,000. The £36m scheme was the largest capital investment project within Anglian Water’s […]

Lower Neuadd Reservoir is located in the Brecon Beacons, 5km north of Merthyr Tydfil in south Wales. The reservoir, which is an embankment dam, was constructed in 1884. It is the middle of a cascade of three reservoirs, with Upper Neuadd situated 3km upstream of the much larger Pontsticill Reservoir. Lower Neuadd Reservoir had a […]

Ludham WTW supplied 2.1 million litres a day (MLD) of treated water to 2,464 properties in Ludham and Martham whilst originally being fed by Ludham boreholes, with emergency supply coming from East Ruston boreholes. This £7.6m scheme addressed area growth and abstraction licence challenges by combining different schemes to deliver an efficient solution for customers […]

Maerdy Water Treatment Works (WTW) is located 35km north of Cardiff, supplying up to 16Ml/d potable water to customers in Ferndale and the surrounding area. Raw water is gravity fed from Castell Nos and Lluest-Wen Reservoirs and the quality can be highly variable, particularly following heavy rainfall resulting in a challenge to WTW performance. In […]

Northumbrian Water (NWL) provides water supply and sewerage services to a population of 2.7 million in the north east and 1.8 million in the south east of England, delivering 1,100 MLD of drinking water. Potable water treatment works vary from small groundwater sources to large surface water treatment facilities such as Mosswood Water Treatment Works […]

Severn Trent’s existing Poolend Borehole Pumping Station is located near Leek in Staffordshire and is one of four sources that supply water to Ladderedge DSR. A second borehole source feeds into the Poolend site where both sources undergo water treatment (pH correction, plumbosolvency, marginal chlorination, and ultraviolet (UV)). To ensure continued water security in the […]

Portsmouth Water’s River Itchen Water Treatment Works (WTW) is located to the east of Southampton Airport near to the picturesque Itchen Valley Country Park and abstracts water directly from the River Itchen for treatment. The River Itchen is 28 miles long and runs from mid-Hampshire near Cheriton through Winchester to Southampton at Mansbridge and is […]

Located in Temple, near Gorebridge, in Midlothian, Scotland, Rosebery WTW treats raw water sourced from Megget and Gladhouse Reservoirs which is blended at the works inlet. The blended raw water is generally low in turbidity (2.0 NTU 95%ile), moderate colour (63 mg/l Pt/Co 95%ile), with average to high metals concentrations (55 to 300ug/l Mn, Al, […]

In 2016, United Utilities was issued with a Service Reservoir Cleaning notice by the Drinking Water Inspectorate (DWI) as part of the Company transformation programme. Inspecting, cleaning and maintaining the reservoirs first required a batch of projects to provide the facility to isolate five existing service reservoirs (SRs) from the water network, whilst maintaining supply […]

The Eels (England and Wales) Regulations 2009 came into force on 15 January 2010 to support the UK in implementing EC Council Regulation (1100/2007). The regulations require all surface water abstractions of more than 20m3/d to be fitted with suitable eel screens by 2021. A batch extension was granted to Severn Trent until end of […]

The Sunderland Groundwater Stations (GWS) have historically provided a reliable and cost-effective source of good quality water to the Wearside distribution area. They were mostly built in the late 19th and early 20th centuries and consist of one or more shafts, of up to 150m in depth, into the magnesian limestone aquifer. Each station has […]

The Uckington Borehole Capital Maintenance (BCM) and Restoring Sustainable Abstraction (RSA) Treatment Project set out to achieve the goal of an ecological improvement of the River Worfe while safeguarding the public water supply to the Telford area network. Over-abstraction from the River Worfe was impacting the achievement of Good Ecological Status under the Water Framework […]

Affinity Water own and operate a crucial and long-standing water treatment works which is situated to support the north London water supply infrastructure. Any shortfall in the production of treated water leads directly to the need for importing water from a neighbouring water company. Four groundwater sources are combined and treated at site, all of […]

Ardsbeg Water Treatment Works (WTW) is located in a remote area in the north of Co. Donegal in Ireland and treats water from a lake source to serve local villages of Gortahork and Falcarragh as well as rural farms and dwellings. The WTW was originally built in the 1960s and was modified in 2003. However, […]

The Thames Water Ring Main (TWRM) in London is an 80km long, 2.5m diameter tunnel built between 1988 and 1994 to take water from five treatment works and transfer flows via pumping stations housed in shafts along the route. It is a major part of London’s water supply infrastructure and carries an average daily flow […]

The Thames Water Ring Main (formerly the London Water Ring Main) is a major part of London’s potable water supply infrastructure. Originally constructed between 1988 and 1993, it forms a 50-mile ring of mostly 2.54 m (100”) diameter concrete pipeline to transfer potable water from water treatment works in the River Thames and Lea catchments […]

The Hereford Water Network is dependent on a single source of supply from the River Wye and Dŵr Cymru Welsh Water identified a need to assess the resilience of the network to maintain customer supply during any future loss of source supply events. The resulting hydraulic assessment identified the requirement to increase the available storage […]

The low-pressure standard (formerly called DG2) is defined by Ofwat as a pressure of less than 10 metres at a flow of 9 litres per minute when measured on the customer side of the water company stop tap. Any properties in breach of this threshold are recorded on the low pressure register and the number […]

Blackmoorfoot Reservoir, a storage reservoir situated south-west of Huddersfield in West Yorkshire, was constructed between 1871 and 1876 at a cost of £260,000. It has a capacity of over 700,000 gallons and covers an area of 102 acres and provides raw water to Blackmoorfoot WTW, which supplies treated water to Huddersfield and surrounding areas. The […]

The Bray Keleher Water Treatment Works (WTW) abstracts and treats a maximum of 45 Ml/d of river Thames water and is located on Monkey Island Lane, Bray, between Windsor and Maidenhead. The works is of strategic importance in maintaining supplies to the western region of South East Water (SEW). As part of the final determination […]

Between 1893 and 1904 the Birmingham Corporation dammed the Elan Valley in Wales and constructed an aqueduct to channel water to Birmingham. At the height of the industrial revolution, between 1800 and 1900 Birmingham was booming, and its population rose substantially. Following outbreaks of smallpox and diarrhea, city officials deemed it essential to provide its […]

The Birmingham Resilience Project (BRP) is designed to provide a backup source of raw water from the River Severn to the water treatment works that serves Birmingham. During planned or unplanned outages of the primary water source, the raw water system will abstract water from the River Severn between October and March and supply 117 […]

Raw water has been collected in reservoirs in the Elan Valley in Wales and transferred 118km under gravity through an aqueduct to the water treatment works (WTW) in Birmingham for treatment and distribution to the city’s residents and industries since the beginning of the 20th century. The original infrastructure was constructed over 100 years ago, […]

During AMP4, Thames Water Utilities Ltd (TWUL) undertook low flow investigations for the Letcombe Brook, in the Wantage area of Oxfordshire. It was determined that the abstraction at Childrey Warren Water Treatment Works (WTW) was having an adverse impact on the river flows and the local environment. A subsequent review of options which included augmentation, […]

Situated on the Derbyshire/Nottinghamshire border, Church Wilne WTW serves 600,000 Severn Trent (ST) customers in the East Midlands. Built in 1967 to extract and treat 27 ML/day from the River Derwent, the works has been extended twice to 135 ML/day meeting the needs of both a growing population and increased water quality standards. However, the […]

South East Water’s College Avenue Water Treatment Works in Berkshire supports the Maidenhead water supply infrastructure. It extracts raw water from three boreholes and three chalk wells, which is then dosed with sodium tripolyphosphate (STPP), aerated, passed through granular activated carbon (GAC) absorbers, and finally injected with sodium hypochlorite to super-chlorinate it before entering the […]

Durleigh Water Treatment Centre is located approximately 2km west of Bridgwater, Somerset and is Wessex Water’s second largest surface water treatment works serving a population of 44,500. The site was originally designed to treat up to 28.5 Ml/d, with water drawn down from the 959,000m3 Durleigh Impounding Reservoir. Raw water quality has deteriorated in recent […]

High Speed 2 (HS2) will be the UK’s new £56 billion high speed railway linking London to the Midlands and north of England with some sections of the route already under construction. The new high-speed railway line in Yorkshire will run from Chesterfield to Leeds. Yorkshire Water are the water and wastewater authority in this […]

Located to the West of the town of Banchory, Aberdeenshire, Scottish Water’s Invercannie WTW is currently a 49 Ml/d water treatment works which serves the local population as well as providing raw and treated water to Mannofield WTW in Aberdeen via two 28km aqueducts (one laid in 1866 and the other in 1924). The treatment […]

Keele University is situated in the village of Keele, Staffordshire, on the outskirts of Newcastle-under-Lyme. It was established in the 1940s and has grown considerably to educate approximately 10,000 students on a 625-acre (253ha) campus. The University owns and operates its own water supply infrastructure; this includes approximately 16km of pipework and a service reservoir. […]

Severn Trent’s Ketford Borehole Pumping Station (BPS) is a critical source which feeds into the Bromsberrow BPS, where the water is blended before being pumped into supply. The pumping station was vulnerable to outage largely due to having a single operational borehole. There were three boreholes at the site (BH1, BH2 and BH3), which historically […]

Langford Water Treatment Works (WTW) is owned and operated by Essex and Suffolk Water (ESW), part of the Northumbrian Water Group (NWG). The treatment works, located near the town of Maldon, treats water abstracted from the nearby River Chelmer and River Blackwater. The river water quality changes greatly with rainfall, at times of excessive turbidity […]

Yorkshire Water’s Langsett Water Treatment Works (WTW) is located 17km north-west of Sheffield in South Yorkshire, on the edge of the Peak District National Park. The WTW treats raw water which is extracted by gravity from two upland impounding reservoirs at Langsett (adjacent to the WTW) and nearby Midhope (approximately 1km south-east of the site). […]

In April 2015, BT announced they would be withdrawing support of all their very low bandwidth (VLB) leased lines from a fixed deadline of the 31 March 2020. Leased lines are dedicated lines, used as connections to carry communications or electrical signals between two locations. They are often used in conjunction with telemetry outstations, with […]

United Utilities’ (UU) vision is to be a leading north west service provider, and one of the best UK water and wastewater companies. It is a challenging vision, but one United Utilities are capable of achieving by focusing on three objectives to deliver the best service to customers, at the lowest sustainable cost and in […]

Llyn Brenig impounding reservoir is located in the Denbigh Moors in North Wales. It was constructed in 1975 and was officially opened by the Prince of Wales. It forms part of the River Dee regulation to manage flow into the Dee via the Afon Alwen. The reservoir has a capacity of around 60 million cubic […]

Lough Fea Water Treatment Works supplies water to approximately 24,000 Northern Ireland Water customers, with the Lough Fea Clear Water Basin South supplying over 10,000 people in Cookstown and surrounding rural areas. A 2013 report commissioned by NI Water identified the need for increased potable water storage facilities within the Lough Fea Supply Zone to […]

Murton WTW is fed by six boreholes and supplies up to 350m3/hour of potable water to Berwick-upon-Tweed and surrounding areas, serving over 7,500 properties. The boreholes which feed the Berwick Water Supply Zone can contain turbidity, particularly when flows are high, interrupted or varied. The existing treatment process was unable to remove the turbidity, causing […]

Severn Trent have made a £60m investment in Newark-on-Trent upgrading the sewers and water supply network throughout the town. The project provided relief to some 400 homes and businesses from sewer flooding, and provided a robust water supply system which will serve the town for many years to come. The project included a 2.8km segmental […]

In summer 2019, Northern Ireland Water commenced upgrade works to the water supply on Rathlin Island, Northern Ireland’s only inhabited offshore island. The current public water supply on Rathlin Island is supplied from groundwater. It consists of a pair of closely located boreholes feeding a simple double cartridge type filtration system with sodium hypochlorite dosing […]

As with all water companies, Northern Ireland Water (NI Water) work within the targets and guidelines set by their industry regulator, the Northern Ireland Utility Regulator and the Drinking Water Inspectorate (DWI). At present Northern Ireland’s existing potable water main infrastructure comprises approximately 26,700 km of water mains, delivering approximately 560 million litres of clean, […]

The Eels Regulations 2009 require an eel screen to be installed within a diversion structure capable of allowing at least 20m3 of abstraction in a 24-hour period. The focus of this programme is to protect a threatened species of fish, brook lamprey (Lampetra planeri). This eel-like ancient fish is rare in the UK and ranges […]

Refurbishment project to strengthen resilience of raw water supply to Essex strategic reservoirs

Essex and Suffolk Water’s Syleham Water Treatment Works is located in the north-east part of Hartismere in Suffolk. The works supplies water to the north side of Eye and to Fressingfield Water Tower, which in turn supplies approximately 4,000 properties (10,000 customers) throughout a number of villages. It was originally constructed in 1940 and raw […]

Tarbert WTW is located on the edge of Loch Fyne, an inland sea loch, west of the small village of Tarbert in Argyll & Bute. The water treatment works is supplied from the Loch a’ Chaorainn located 5 miles north-west of the treatment works, serving a population of approximately 3,000. To remove the risk of […]

Uig WTW is located on the west coast of Lewis and provides potable water to the community of around 500 residents, with a significant tourist increase in the summer months. The works are gravity-fed by a high-level loch around 2km from the site. Treated water is then pumped from the water treatment works to a […]

United Utilities has completed the refurbishment of Aubrey Street Reservoir, a 40Ml underground service reservoir located just outside Everton and serving Liverpool district. Treated water for the 41-year-old reservoir is pumped in from Huntington Water Treatment Works in Chester. The main driver for the project was water quality, which risked being compromised by heavy ingress […]

Located in South Ayrshire, Scotland, Bradan Water Treatment Works (WTW) has a capacity of 120 Ml/day, with an output of approximately 70 Ml/day. The existing treatment processes comprise aluminium sulphate coagulation, dissolved air flotation, primary filtration, manganese contactors, orthophosphate dosing, lime and disinfection. The works supplies a large area along the west coast of Scotland, […]

Brantham Raw Water Intake is owned and operated by Essex and Suffolk Water (ESW), part of the Northumbrian Water Group (NWG). The raw water intake, located on the banks of the River Stour north of Colchester, abstracts water from the River Stour where it is transferred under gravity to Brantham Pumping Station. The raw water […]

The Bray Keleher Water Treatment Works (WTW) abstracts and treats a maximum of 45 Ml/d of water from the River Thames and is located on Monkey Island Lane, Bray which is part way between Windsor and Maidenhead. The works is of strategic importance in maintaining supplies to the western region of South East Water (SEW). […]

Since the beginning of the 20th century, raw water has been conveyed 118km from the Elan Valley in Wales, under gravity by aqueduct, to the water treatment works (WTW) in Birmingham for treatment and supply to the population of the city. The aqueduct has been in continuous service for over 100 years and requires some […]

Bryn Cowlyd Water Treatment Works is located south of the village of Dolgarrog in county of Conwy. The works is gravity fed with raw water from Llyn Cowlyd, 350m above and approximately three miles south west of the works, in the Carneddau mountain range in Snowdonia National Park. The old treatment works was commissioned in […]

During AMP4, Thames Water Utilities Ltd (TWUL) undertook low flow investigations for the Letcombe Brook, in the Wantage area (Oxfordshire). It was determined that the abstraction at Childrey Warren Water Treatment Works (WTW) was having an adverse impact on the river flows and the local environment. A subsequent review of options which included augmentation, works […]

In 2016 Yorkshire Water made the strategic decision to remove all chlorine and sulphur dioxide gas from its Water Treatment Works. This formed part of the Yorkshire Water Safety Improvement Plan as the existing toxic gas disinfection systems were becoming non-compliant with Health and Safety regulations and posed a potential significant risk to employees and […]

Balder Pipe Bridge spans the River Balder in Cotherstone Village near Barnard Castle, County Durham. The bridge abutments occupy private land on either side of the bridge with a public footpath running past the south abutment. The bridge was original designed to carry a single 24” cast iron raw water main which supplies Lartington Water […]

Dŵr Cymru Welsh Water has an extensive network of rural water supply assets in North Wales, with numerous service reservoirs and many kilometers of pipeline. Emergency repairs or mitigation measures have arisen from both freeze-thaw conditions and dry weather over the past few years. During 2018 there were both extremes of cold weather and one […]

Located south of the town of Elgin in the north east of Scotland, Scottish Water’s Glenlatterach WTW is situated in the heart of Speyside, home to some of Scotland’s most beautiful scenery as well as roughly half of all of the whisky distilleries operating in Scotland. Raw water is abstracted from the Glenlatterach Reservoir and […]

The Island of Jersey is situated in the English Channel, 161km south of the English coast. Jersey Water produces the Island’s potable drinking water, supplying over 90% of the Island’s population of 100,000. Jersey Water operates six major reservoirs, one of which is Grands Vaux Reservoir. Originally built in 1951, it is situated in St […]

Hazards Green WTW is a South East Water treatment works situated near Ninfield in East Sussex. The works abstracts river water directly from the Wallers Haven and following treatment, supplies a large volume of commercial and domestic customers in the surrounding areas. Prior to this scheme the existing abstraction point had ageing static, coarse trash […]

Guernsey is an island with a population of around 65,000. It has been served by three water treatment works; two (at Longue Hougue and St Saviour) utilising a membrane technology, and the third based on a more traditional rapid gravity filtration (RGF) process. The operation, control and reliability of the Longue Hougue plant had for […]

Loch Ness Regional is a new multi-site £22m water treatment works and infrastructure project for Scottish Water improving the water supply to their customers from the villages of Fort Augustus and Invermoriston, both to the south of Inverness. Located on the banks of Loch Ness, the project’s objective is to improve the treatment of water […]

Lochmaddy is the main town located on North Uist, which is one of the islands forming part of the Western Isles. This project involved the design, installation, construction and commissioning of a new water treatment works (WTW) on a greenfield site beside the existing site. Additionally, some of the works were within South Lewis, Harris […]

Yorkshire Water’s Loftsome Bridge Water Treatment Works (WTW) is sited off the A63 between Selby and Howden in East Yorkshire. This WTW is a key part of the Yorkshire Water Services’ network, serving the Hull distribution network and contributing significantly to the Yorkshire Water Grid System. The WTW abstracts water from the River Derwent which […]

The Mythe Water Treatment Works is situated on the east bank of the River Severn, approximately half a mile north of the town of Tewkesbury in Gloucestershire and provides drinking water to population of circa 400,000. Mythe WTW came to national attention in July 2007 when the site was partially inundated with flood water from […]

Otterbourne WSW is a critical site, located between Southampton and Winchester, supplying water to the surrounding area to a total of around 250,000 homes. Otterbourne was originally constructed in 1939, with extensions to the works being constructed in 1949 and 1958. The works treats borehole and river water which supply two independent treatment streams. The […]

As part of a continued effort to improve service to customers and ensure resilience and security of supply, the team at Northumbrian Water Limited together with Stantec UK carried out an investigative study of the issues related to the River Yare Strategic Crossing and identified a cost effective solution that achieved these objectives. The Great […]

Talybont is a Large raised reservoir situated in the Brecon Beacons National Park approximately 30 miles north of two of the most populated cities in Wales; namely Cardiff and Newport. Construction of Talybont Dam began in 1932 and ran through until 1939. It was conceived out of a requirement to supply treated water to the […]

Ten Acre Impounding Reservoir (IRE), located in Haverah Park near Harrogate, is owned and operated by Yorkshire Water (YWS). The reservoir is impounded by an earth-fill embankment dam, approximately 17m above natural ground level at the highest point, with a capacity of 150,000m3 at top water level. The reservoir was constructed by Harrogate Waterworks Company […]

Thames Water’s water distribution network totals some 31,000km of mains that provides about 2.6 billion litres of water every day. This network has been built up over many years and includes pipes that were laid during the Victorian age. Pressure management is an established way of leakage reduction and network protection, ensuring that customers receive […]

Warland Impounding Reservoir (IR) is situated on the western slope of Blake Moor, above Littleborough, Lancashire. The reservoir was originally constructed around 1857 by the Rochdale Canal Company to maintain water levels in the Rochdale canal, and was considered to be one of the largest dams in England at the time. It has a 1500m […]

The Water Supply GRID is the largest scheme ever undertaken by Wessex Water and provides important new infrastructure for the south-west region with resilience connections to Bournemouth Water, Bristol Water and South West Water via Wimbleball Reservoir – it is effectively a south-west area regional grid (see Figure 1 below). It has improved interconnectivity within […]

One of Affinity Water’s long-standing water treatment works (WTW) is to be upgraded following successful completion of industry leading research and development trials. By utilising a pioneering new technology, Affinity Water will be able to continue to deliver a high quality supply of water for customers and communities whilst continuing to operate a robust treatment […]

Audley Borehole Pumping Station is one of Severn Trent Water’s (STW) borehole capital maintenance projects which supports the Peckforton Group in supplying potable water to Coopers Green Reservoir. As part of the £3m scheme, the project focuses on delivering resilience from Audley to maintain high quality water supply to the people in Staffordshire. Audley is […]

During investment period 2016/17, Scottish Water commenced the first phase of construction on a £120m investment project known as the Ayrshire Resilience Scheme, designed to improve the resilience of the drinking water network throughout much of Ayrshire and parts of East Renfrewshire. Once complete, this scheme will benefit more than 200,000 Scottish Water customers. Caledonia […]

The Southern Strategic Support Main (SSSM) comprises a 700mm diameter pipe line between Barrow WTW in south Bristol to Sandford, a distance of 19km, and a 600mm diameter pipe line between Cheddar WTW and Banwell a distance of 11km. The two pipelines connect at Sandford. The project commenced with a review of the outline proposal […]

At the height of the industrial revolution, Birmingham’s population was booming. Between 1800 and 1900, the city had grown substantially. An innovative solution was needed to provide its residents and industries with safe drinking water. James Mansergh had identified the Elan Valley as a source for water. With Birmingham located so far in land, the […]

The Elan Valley Aqueduct (EVA) is a Victorian water structure built between 1893 and 1904. The aqueduct transports water entirely by gravity from the Elan Valley in Wales to Frankley Water Treatment Works in Birmingham, and comprises a combination of cut and cover conduits, siphons and tunnels. Over 100 years on and this aqueduct still […]

The Birmingham Resilience Project aims to deliver a new water supply into Birmingham to allow extended planned maintenance shutdowns of the Elan Valley Aqueduct (EVA) as well as providing a back-up for any emergency events. The new supply will be brought into use every other year, for up to 50 days during months of October […]

Since the beginning of the 20th century, the Elan Valley Aqueduct (EVA) has conveyed raw water 118km from the Elan Valley in Wales under gravity to Frankley Water Treatment Works (WTW) in Birmingham. The treatment works was inaugurated at the same time as the EVA and has treated water, to supply the residents and industries […]

The Southern Resilience Scheme is a new £27m water infrastructure project that provides improved security of water supply to a population of approximately 280,000 people across Bristol Water’s supply area. The scheme comprises a new 30km ductile iron main of 600mm and 700mm diameters, as well as the upgrade of the existing pumping station at […]

Cowleigh Distribution Service Reservoir (DSR) and Lower Wyche DSR are located to the north and south of Great Malvern, Worcestershire and are overlooked by the Malvern Hills. Cowleigh DSR receives water from Powick Pumping Station and the Southern Strategic Main, whilst Lower Wyche DSR receives water from Bromsberrow WTW which is borehole site. Severn Trent […]

Dalton Piercy Water Treatment Works (WTW) supplies an average demand of 32 Ml/d to ~45,000 properties and significant industrial customers in Hartlepool. The current site process includes UV disinfection, sodium hypochlorite dosing and orthophosphoric acid dosing. This article describes how Anglian Water’s @one Alliance successfully applied product-based delivery principles to the Dalton Piercy Manganese and […]

Of Dŵr Cymru Welsh Water’s 85 (No.) Water Quality Zones (WQZs), 20 (No.) contribute 75% of the company’s targets to improve water quality and reliability. Detailed analysis has been carried out and documented in Zonal Study reports for these zones. These identified specific schemes, ranked in cost benefit order, presented in a standard plan and […]

The water industry is highly-regulated, most particularly to ensure that drinking water is safeguarded and fit for human consumption. The Drinking Water Inspectorate (DWI), formed in 1990, holds responsibility for regulation in England and Wales. The DWI inspects the laboratories where water companies rigorously test their drinking water and ensure that water operations are of […]

High Speed 2 (HS2) Phase 1 will intersect a large number of critical third-party assets along its 190km route, with a significant impact on several of the UK’s water and wastewater companies. In London, approximately 50kms of Thames Water’s buried assets are affected by construction of the new railway, including a number of highly strategic […]

Welsh Water’s Glascoed Water Treatment Works (WTW) is situated south of the village of Bodelwyddan in the county of Denbighshire. It was commissioned in 1994, with additions made in 1995 and 2009. The works supplies up to 20 Ml/d to customers along the North Wales coast. The works receives its supply of raw water from […]

Built under the Bradford Corporation Waterworks Act 1890, Gouthwaite Impounding Reservoir (IRE) forms the lowest of a cascade of three reservoirs in Upper Nidderdale, all designed by their chief waterworks engineer. The upper two reservoirs, Angram and Scar House, supply water along the Nidd Aqueduct to Bradford. Gouthwaite IRE was built 11km downstream to provide […]

A ‘product-based’ approach to service reservoir construction is revolutionising the way MMB are constructing a new multi-million-pound distribution service reservoir (DSR) for Severn Trent Water (STW). To boost productivity in the construction process, the new 43ML reservoir is being treated as a ‘product’, manufactured largely off site in controlled-conditions, before being assembled on site near […]

Yorkshire Water’s Irton Water Treatment Works (WTW) is located 5.5km southwest of Scarborough in North Yorkshire. The WTW abstracts water from an aquifer via numerous boreholes and supplies two local service reservoirs; Springhill and Low Mount, which feed Scarborough and the surrounding area. Demand profiles are seasonably variable. The site has an abstraction licence for […]

Island Barn Reservoir is located in West Molesey near Hampton Court on the Surrey/London border. The reservoir is a non-impounding reservoir and is retained by an earth fill embankment with puddle clay core approximately 10.8m high and 2,700m long. The reservoir has a stated capacity of 4,191,000m3 and a surface area of 489,700m2, when full […]

The Lochaline Water Quality Upgrade Project required the design and delivery of a whole new water treatment works at Lochaline in the remote Morven Peninsula. A modern and compact membrane based treatment technology was selected which would support a rapid and efficient delivery strategy. The key to the delivery strategy was an on off-site modular […]

Lockwood Reservoir is one of ten Walthamstow reservoirs in north London and makes up part of Walthamstow Wetlands; Europe’s largest urban wetland nature reserve. It is also a Site of Special Scientific Interest (SSSI) and a Special Protected Area (SPA). The Wetlands attract 250,000 visitors a year and is a key site in London for […]

The installation of new eel and fish friendly screens at Northumbrian Water Group’s (NWG) Lumley Raw Water Pumping Station (RWPS) was the culmination of collaborative working between multiple stakeholders, to transform the screening methodology in an environmentally sensitive location. The final solution provides an option that presents immediate environmental benefits to aquatic life, with low […]

Between 2007 and 2014 two of Northumbrian Water’s (NWG) water supply zones, served by Whittle Dene WTW and Warkworth WTW, both in Northumberland, consistently received the highest number of water quality contacts for discoloured water. In previous AMP periods, NWG undertook a programme of strategic mains cleaning and unidirectional flushing to improve customer acceptability performance. […]

Melbourne WTW is the second largest clean water treatment works in Severn Trent Water (STW) and serves large population centres in south Derbyshire and Leicestershire with capability to supply up to a maximum of 250Ml/d. The dissolved air flotation (DAF) process removes suspended solids and other contaminants via the use of air bubble flotation. The […]

Melbourne Water Treatment Works (WTW) is situated in the eastern region of Severn Trent Water Ltd. It is the primary feed to 750,000 customers in the Leicestershire area. The original works was constructed in the 1960s and this was totally rebuilt in the 1990s and is capable of supplying up to 220MLD. In early 2016, […]

New Malden pipe-track contains 3 (No.) 30” and 1 (No.) 48” trunk mains, with the oldest main being nearly 170 years old. The mains feed the Surbiton supply zone and serve as bulk transfer mains to supply south-west London. Kingston Council is going to build a new cycleway over the track; however, these mains are […]

Located near Okehampton, Northcombe WTW supplies a large region of North Devon including Barnstaple, Bideford and South Molton. The works supplies over 88,000 customers, with around half of these relying on Northcombe as their sole supply of water. As standards for water quality change, South West water (SWW) has been issued a notice by the […]

Ogston Water Treatment Works (WTW) is located at Stretton, Higham in Derbyshire and it provides treated water to Higham, Ambergate and Whiteborough Reservoirs. The maximum works output is 76 mega litres per day (MLD) with an output for the New works DAF (dissolved air flotation) plant of 50 MLD. As part of the AMP6 coagulation […]

Prioress Mill Raw Water Pumping station (RWPS) is located in Rhadyr, near Llancayo, Monmouthshire, on the south bank of the River Usk. It abstracts at a rate of up to 318 ML/day, and is the primary supply to Llandegfedd reservoir, which then feeds Sluvad Water Treatment Works (WTW). Prioress Mill RWPS has been identified by […]

Yorkshire Water Services (YWS) committed to the Drinking Water Inspectorate’s (DWI) compliance date of 31 December 2017 for beneficial completion of a new clarification process at Rivelin WTW. The £25m scheme required the design and construction of a large 82.5MLD buried treatment plant (80m long, 40m wide and 14m high) on the border of the […]

Sheeplands WTW is a groundwater treatment plant supplying an average of 12Ml/d to the Bowsey Hill Service Reservoir and local district zones. The site comprises of three boreholes, a ‘blending’ raw water supply main received from Harpsden WTW, a nitrate removal plant, GAC vessels, sodium hypochlorite storage and dosing, sodium bisulphite storage and dosing, single […]

Caledonia Water Alliance (CWA) has been tasked with improving the water infrastructure network within Edinburgh and the Lothians, in partnership with Scottish Water. The Scottish Water project driver is CS16WR for Water Systems Resilience; associated with improving resilience of network supply. The project objective is to provide resilience in the wider water distribution network linked […]

Stanford Reservoir is an impounding reservoir that is located in the upper reaches of the River Avon. The catchment area of the reservoir is 55.2km2. This scheme was developed following a Section 10 Report (MWH – now Stantec UK – 2014), where after the re-categorisation of the reservoir from B to A, the Inspecting Engineer […]

The Norfolk Broads is a low-lying landscape of interconnected lakes (broads) and streams and large parts are also Sites of Special Scientific Interest (SSSIs) and contain a number of protected species of flora and fauna. One area of the Norfolk Broads; the Trinity Broads, provides raw water to Ormesby Water Treatment Works (WTW) operated by […]

Tynywaun Water Treatment Works forms part of the South East Wales Conjunctive Use System (SEWCUS) chain of water treatment works that supply the central South Wales valleys and cities of Newport and Cardiff. This SEWCUS system does not, however, provide full conjunctive use to the Tynywaun distribution area, having very limited connectivity. The works has […]

Upper Chelburn Impounding Reservoir (IR), located near Rochdale on the east Lancashire moors, is owned and operated by United Utilities (UU), providing compensation water to the nearby Rochdale canal. The reservoir is impounded by northern and southern earth-fill embankments (Figure 1), with a resulting capacity of 236,000m3. The 16.5m high northern embankment was constructed between […]

Usk Reservoir in Brecon is situated south east of Llandovery and approximately 5km to the west of Sennybridge. The reservoir is an existing 12.3Mm3 reservoir in the Brecon Beacons National Park in South Wales. It is impounded by a 31m high, 480m long embankment dam with a clay core, which was constructed in 1955. The […]

Originally built in 1965, Uttlesford Bridge Pumping Station near Saffron Walden consisted of two boreholes, a contact tank, booster pump suction tank and treatment by marginal chlorination. The licence at Uttlesford Bridge is a combined group licence with Springwell Farm of 13.64MLD. There are times during peak demand that up to 5MLD compensation flow is […]

Whittle Dene Water Treatment Works is Northumbrian Water’s fourth largest treatment works with a deployable output of 118Ml/d, supplying 228,000 properties. Located in Northumberland, 13 miles west of Newcastle, it is a strategically important works to Newcastle, Gateshead, North Tyneside, South Northumberland and Tyne Valley regions. Raw water at the site comes from adjacent reservoirs […]

Woodgate Hill Service Reservoir No. 2 (SR2) was commissioned in 1963, providing a total capacity of 269Ml and a throughput that equates to 20% of the regional water demand. The reservoir was built in to the hillside with an excavation of around 380,000m3. With a footprint of 47,000m2, at the time of construction, Woodgate Hill […]

Affinity Water’s largest water treatment works (WTW) is being upgraded as part of their AMP6 business plan to ensure they continue to provide a robust treatment solution for the removal of pesticides from water abstracted from the River Thames. The scope of the works is to increase the granular activated carbon empty bed contact time […]

The existing Ambergate Reservoir was commissioned in 1907 and formed a part of the Derwent Valley Aqueduct receiving water from the Upper Derwent Valley. Water treated at Bamford WTW is delivered to Ambergate Reservoir by gravity via the aqueduct. The existing reservoir had a capacity of 128Ml supplying water to the cities of Derby, Nottingham […]

Thames Water Utilities Ltd (TWUL), in consultation with the Environment Agency (EA) committed to cease Kennet Aquifer abstraction at Ogbourne WTW and reduce abstraction at Axford WTW by 31st March 2017. The Ogbourne licence has been reduced to zero whilst the Axford licence has been changed to a sliding scale dependent on flows in the […]

The Southport Demand Monitoring Zone (DMZ) comprises ten supply zones with a population of approximately 245,000 covering the majority of the areas of the District Councils of West Lancashire and Sefton. Southport DMZ suffers from a number of issues including (i) peak demand during the summer months (ii) population growth (iii) water management. To overcome […]

At the height of the industrial revolution, Birmingham’s population was booming. Between 1800 and 1900, the city had grown substantially. An innovative solution was needed to provide its residents and industries with safe drinking water. James Mansergh had identified the Elan Valley as a source for water. With Birmingham located so far in land, the […]

Frankley Water treatment Works (WTW) provides a potable water supply to the metropolitan area of Birmingham, and has done so for over a century. Currently it treats water that is conveyed by gravity from the Elan Valley in Powys, Wales. Severn Trent Water is in the process of upgrading Frankley WTW to accommodate a new […]

Yorkshire Water’s Butterley Reservoir is located in the Wessenden Valley, West Yorkshire, with construction completed in 1906. The reservoir dam has a puddle clay core and a spillway constructed with local traditional stone. Due to fissures in the surrounding rock, leakages around the dam were experienced during the original commissioning phase, leading to a longer […]

Following a burst on the existing 24” trunk main running along the Oxford Eastern Bypass in September 2014 causing severe flooding, Thames Water made the decision to replace the high risk section of the main to prevent future pipe failures. The Optimise Joint Venture delivered the £6m project, installing 2km of replacement trunk main along […]

Digley Impounding Reservoir (IRE) is located in Holmbridge, Huddersfield. The valve tower associated with the reservoir had corroded access metalwork which did not meet current health and safety standards. The project replaced all the corroded access metalwork within the valve tower with new Yorkshire Water Asset Standard compliant metalwork, improving safe access within the tower. […]

Portsmouth Water’s Farlington WTW dates back to 1909 and provides potable water to more than 280,000 people and many businesses in the Portsmouth and Havant area. Farlington’s supply is derived from the springs, which are believed to be the largest spring source in Europe. In April 2015 Portsmouth Water issued a tender based on an […]

Scottish Water has undertaken a £120m drinking water improvement scheme in Ayrshire to meet water quality compliance objectives and provide increased resilience of supply to five operational areas. The scheme involves the transfer of water from the Milngavie WTW located north of Glasgow to the Ayrshire region southwest of the city. The scheme makes use […]

Heigham Water Treatment Works (WTW) is the main supply of water to Norwich and supplies an average of 42Ml/d of water sourced from the River Wensum at several locations. Potable water is pumped into the Norwich Public Water Supply Zone feeding a multitude of storage reservoirs, booster pumps and properties. The main raw water abstraction […]

At the start of construction for the Hanningfield Raw Water Reservoir, an Act of Parliament The Hanningfield Water Order 1950 was passed with agreements put in place for the maintenance of the lock between the navigation company (Essex Waterways) and Northumbrian Water Group (NWG), parent company of Essex and Suffolk Water. NWG abstracts water from […]

Hoplands Farm WTW is a South East Water treatment plant serving the local towns of Herne Bay and Canterbury. Raw water is pumped via submersible borehole pumps from two chalk boreholes located within the works. The total flow from these boreholes is a maximum of 79 l/s. The raw flows are super-chlorinated and then passed […]

Northumbrian Water’s Horsley WTW serves around 800,000 people in the Newcastle and Tyneside area. The original works was constructed in 1977 and last extended in 2003. It draws its supply from the nearby River Tyne at Ovingham and the Whittle Dene complex of reservoirs fed from Kielder Water. The existing works has a capacity of […]

An existing, but ageing, 33”-36” diameter potable water main supplying over 40,000 customers in Ayrshire was identified by Scottish Water as requiring replacement. The existing pipeline was to be replaced with a new pipeline constructed of polyethylene (PE) pipe sections butt-fusion welded into 200m long pipe strings. Caledonia Water Alliance (CWA), a joint venture between […]

The small island of Iona itself lies off the Isle of Mull in the Inner Hebrides off the west coast and is widely regarded as the birthplace of Christianity in Scotland. To the current day, Iona and its monastery has been a renowned centre of religious learning and pilgrimage and the Abbey is one of […]

Kingston Water Treatment Works (WTW) is located within a 10 minute drive from Canterbury town centre and the train station. The treatment works is located within the Kent Downs Area of Outstanding Natural Beauty (AONB) and is surrounded on three sides by a mature wooded area and on one side by two residential properties. Raw […]

Llyn Teifi Reservoir is situated in a remote area on the western slopes of the Cambrian Mountains in Ceredigion, west Wales, and was created in the early 1960s by raising a natural lake. It is impounded behind six embankments constructed across natural low spots along its south-western margin, covering an area of just over 25 […]

Service reservoirs play a key, if sometimes unsung, role in the supply of clean water within the UK. While most are far less visible and well known than the open reservoirs and other sources they serve, they balance supply and peak demand and ensure that customers’ taps never run dry. The refurbishment of one such […]

The innovative use of a spray applied structural concrete ‘shotcrete’ lining is a cost and programme effective alternative to ‘traditional’ in situ or precast concrete repair, or re-construction of masonry reservoir spillways. This construction methodology was used successfully across three masonry spillways of varying geometries to prolong the operational life of the ageing structures, whilst […]

The original Outwoods Reservoir (No.1) was constructed in 1882 in Burton on Trent. An additional Reservoir (No.2) was added in 1962 in response to increased demand on supply. In 2017, South Staffs Water awarded Stonbury the contract to replace Reservoir No.1 which has proven increasingly expensive to update and maintain and was taken out of […]

Papplewick Borehole Pumping Station (BPS) is located near to Papplewick Village in Nottinghamshire. The site is located within the boundaries of the original and now historic and English Heritage protected site. The scheme replaced the existing outdated and none regulative equipment with a new ultra violet disinfection plant. The team fulfilled their obligations ensuring water […]

The £2.25m Poolend and Highate pH Correction and Plumbosolvency Scheme required the design and construction of a 20Ml/d treatment plant. Poolend BPS is located near Leek in Staffordshire. Water from Poolend and Highgate is blended with water from other sources and supplies thousands of properties across Staffordshire. The successful completion of the scheme by design […]

There is increasing pressure on water utilities to reduce their levels of leakage. The man-hour effort required to find and locate leaks only gets greater as network managers struggle to reduce leakage to lower levels. Costs associated with the treatment and distribution of water can be high and the penalties that utilities can face for […]

DG2 (Director General 2) is a status where, according to Ofwat, a customer receives inadequate water pressure generally under 1bar at their point of connection to the water main. Water companies are subject to annual regulatory fines for properties on the DG2 register above a threshold. Severn Trent Water arranges its distribution to cater for […]

United Utilities (UU) is the statutory undertaker for 132 impounding reservoirs (IRs) retained by earth-fill embankment dams which fall under the requirements of the 1975 Reservoir Act. Before the era of ‘Pennine’ type clay core construction techniques, many impounding reservoirs that were constructed around the turn of the nineteenth century were substantially homogenous, comprising of […]

Tamar WTW was constructed in the mid 1970s and is located on the Cornwall/Devon border near Bude/Kilkhampton. Raw water is transferred to site by gravity pipework from Upper Tamer Lakes Reservoir. The works has a maximum output of 9.0 Ml/d and treated water is pumped by 2 (No.) sets of on-site high lift pumps to […]

At the 2014 Price Review in England & Wales, the economic regulator Ofwat (2013) gave water companies a challenging set of objectives in preparing their business plans. These included a major shift towards outcomes-based regulation, with all business plan investment requirements being justified on the basis of outcomes for customers and the environment, and with […]

Northumbrian Water Group (NWG) provides water services to 1.5 million customers across a large part of Essex and east London, where it operates as Essex and Suffolk Water. As a vital part of Northumbrian Water’s treated water network, demand up to 55Ml/d is pumped from the Langham WTW on the Essex/Suffolk borders and forward boosted […]

In recent years there have been a number of complex bursts at the edge of the M20 motorway in Kent, where three trunk mains cross via an existing tunnel. The bursts have compromised the security of supply between South East Water’s (SEW) Trosley Pumping Station and Beech Reservoir and also flooded onto the hard shoulder […]

Tynywaun WTW is located at the north end of the Rhondda Fawr Valley, at the base of the Rhigos Mountain, in the village of Tynewydd at an elevation of 1,000 feet. Water treatment works have operated at the Tynywaun site since 1906 and the existing works was last refurbished during the 1990s, with new filters […]

The £3.3m Wallgrange Solvents and pH Improvements Scheme required the replacement of two existing borehole pumps and the design and construction of a water treatment works sized to treat 20ML/day. The installation of this treatment works has directly addressed a number of water quality issues and has delivered a more resilient supply to thousands of […]

In January 2010 the Eels (England and Wales) Regulations 2009 came into force which gave the Environment Agency new powers to protect and to conserve the population of eels in the rivers of England and Wales. The abstraction point for Thames Water’s Walton Advanced Water Treatment Works in Walton, Surrey, removed a maximum of 900ML/D […]

Between 2011 to 2013, Southern Water invested £14m replacing old water mains in the Chatham, Gillingham and Rochester. An additional £8 million is now being invested to replace a further 28km of 85-year-old water mains and service pipes to further improve water supply pipes and reduce the risk of discoloured water. The Chatham supply zone […]

Scottish Water has recently commenced the first phase of construction on a £120m investment project designed to improve the drinking water network throughout much of Ayrshire and parts of East Renfrewshire. The project involves the installation of a new large diameter strategic water main from Newton Mearns continuing down towards the Fenwick/Waterside area and finally […]

The Ballydougan to Newry Strategic Trunk Mains Project is the culmination of 10 years work and a £20m investment by NI Water to provide a strategic water main between Ballydougan Command Reservoir, supplied from Castor Bay WTW, and the Newry area. NI Water’s Water Resource Strategy identified the need for a number of strategic links […]

Frankley WTW is located to the south west of Birmingham city centre. It is the primary water treatment works supplying potable water to the city of Birmingham. The Elan Valley Aqueduct (EVA) is a 118km gravity aqueduct that conveys raw water from the Elan Reservoirs in mid Wales to Frankley WTW. The Elan Reservoirs are […]

As part of the Birmingham Resilience Project, Severn Trent Water has been investigating process solutions to treat the River Severn water at the existing Frankley WTW. The current dissolved air flotation (DAF) and rapid gravity filter (RGF) plant was designed to treat the Elan Valley Aqueduct water (EVA), a relatively clean soft upland reservoir source. […]

The construction, in the late 19th century, of the Elan Valley reservoir complex and aqueduct was one of the greatest engineering feats of its age. It was a visionary project which saw civic authorities in Birmingham identify and respond to need, ahead of their rivals, using cutting-edge techniques to transform lives in the West Midlands […]

Welsh Water’s Bryn Cowlyd Water Treatment Works (WTW) is located near Dolgarrog village in the Conwy Valley. The site sits on the eastern side of the Carneddau mountain range on the outskirts of Snowdonia National Park. The existing works on the site was commissioned in 1998 and can deliver up to 46Ml/d of clean water […]

By delivering its largest and most challenging pipeline scheme to date, South East Water has secured the water supply to thousands of homes and businesses in north Kent and provided the area with critical new infrastructure needed to promote development and growth for decades to come. All while enhancing the environment and reducing operational costs. […]

Northern Ireland Water (NI Water) is committed to improving the water supply infrastructure across Northern Ireland to provide a robust and reliable network. Their Water Resource Management Plan (WRMP) 2012 details how the company proposes to manage its water resources into the long-term future. The WRMP looks 25 years ahead and states how the company […]

Dundry Reservoir and Pumping Station is located just 6 miles south of Bristol and provides a reliable supply of potable water to a population of circa 8000 located in the villages of Dundry, Highridge and Withywood. The original reservoir built in the 1950s did not have sufficient capacity for operational and emergency storage to meet […]

Portsmouth Water’s Farlington WTW dates back to 1909 and provides potable water to more than 280,000 people and many businesses in the Portsmouth and Havant area. Farlington’s supply is derived from the springs, which are believed to be the largest spring source in Europe. Raw water is chlorinated at the spring source pumping stations. At […]

Grafham WTW is located near Huntingdon and serves a population of 829,000, including Northampton, Huntingdon and Bedford. It is estimated that approximately 614,000 of these would be affected by a major outage at Grafham WTW. As part of Anglian Water’s AMP5 Final Business Plan programme, the Grafham WTW Resilience scheme was identified to mitigate the […]

Jackson’s Edge Service Reservoir (SR) is a water supply scheme that will provide increased security to the network through the provision of a new 18Ml capacity, twin compartment SR on the site of the existing 103 year old SR. The £7.5m project has adopted a Design for Manufacture and Assembly (DfMA) approach, saving approximately £2m […]

Little Eaton Water Treatment Works is located approximately 4 miles north of Derby just off the A38. The works supplies safe, clean drinking water to the growing community of north-west Derby and was originally designed for a maximum water output of 85MLD. The operational efficiency had been severely compromised due to a number of factors […]

The £2.9m Llandinam Resilience Scheme required the design and construction of a 20,000m3/day treatment plant which can be brought online reliably within 6 hours of detecting a significant failure of the existing treatment stream. The successful completion of the scheme by design and build contractor Mott MacDonald Bentley (MMB) on behalf of Severn Trent Water, […]

South West Water (SWW) has started construction on a new £60m state-of-the-art water treatment works in Devon, the company’s flagship project in its 2015-2020 business plan. Mayflower WTW will use cutting-edge treatment processes, designed and developed by leading Dutch water technology company PWNT and will serve around 250,000 customers in Plymouth and the surrounding area. […]

United Utilities’ Oswestry WTW is located near to the market town of Oswestry, Shropshire on the England/Wales border. The original works became operational in 1892, near the end of the Victorian era, in response to the growing need for wholesome clean drinking water to Liverpool. It is a large works which treats raw water from […]

Located in the Brecon Beacons on the outskirts of Merthyr Tydfil, Pontsticill Reservoir and treatment works date from 1927. The Reservoir holds approximately 13.6 gigalitres of water and is a key element in the supply of drinking water to 106,000 customers in this region of South wales. In recent times Dŵr Cymru Welsh Water has sought […]

Rivelin WTW provides drinking water for a population of approximately 200,000 in Sheffield. The raw water feeding the works is a blend of water from the Derwent Valley via Ladybower Reservoir and the local catchment via Rivelin Reservoir. The quality of the raw water has deteriorated in the period since the current plant was built […]

Scotland’s first dedicated water and wastewater technology testing facilities

Southport is a large seaside town that lies on the Irish Sea coast approximately 20 miles north of Liverpool. With a population over 100,000 Southport is the eleventh most populated settlement in the north-west of England. At the turn of the 19th century the area became popular with tourists due to the easy access from […]

Sunnyhurst and Earnsdale Impounding Reservoirs (IR) are situated 1.5km to the west of Darwen town centre in Lancashire and are owned and operated by United Utilities. Sunnyhurst IR is one of the raw water sources of Fishmoor WTW, which feeds Blackburn and the surrounding areas (population equivalent of 100,000 people). Earnsdale IR provides compensation water […]

Northern Ireland Water (NI Water) has responsibility for providing potable water to almost 1.8 million people across Northern Ireland via some 27,500km of watermains. The company currently operates almost 2,300km of trunk and strategic watermains which represent 8.3% of its potable water network (trunk mains are defined as those with a 300mm nominal diameter and […]

Upper Neuadd Dam is a Grade II* listed structure, situated in the heart of the Brecon Beacons below Pen y Fan in the Taf Fechan valley, about 13km north of Merthyr Tydfil. It is owned and operated by Dŵr Cymru Welsh Water and is the upper dam in a cascade including Lower Neuadd and Pontsticill […]

The existing water mains infrastructure in Northern Ireland consists of 26,500km of pipes supplying 625 million litres of water per day to 1.8 million consumers in households, farms and businesses. While consumers are served well by the existing infrastructure, many parts of the network are well over 40 years old. Lack of investment over the […]

Since the start of AMP5 in 2010, Wessex Water, in conjunction with Atkins Ltd and Servelec Technologies, has been developing its 74km Integrated Water Supply GRID to improve resilience, and ensure that a reliable supply of water can be maintained after the output from some sources has been reduced to alleviate low river flows. The […]

Waterworks Road WTW is located within a 10 minute walk from Eastbourne town centre and the terminal train station. The water treatment works is located in an urban area, surrounded by a mixture of residential and light commercial properties. Raw water is abstracted from a single off site borehole which itself is fed by a […]

Woodmansterne WTW is being upgraded as part of Sutton and East Surrey Water’s (now SES Water) AMP6 investment to secure water supplies for existing and future customers throughout its supply area. The scope of works is to increase the treatment capacity to a maximum raw water flow of 50Mld. Doosan Enpure has been appointed as […]

A challenging water mains replacement project due to narrow streets with listed buildings close to the roadside

Construction of the second largest service reservoir in Europe, a secure water supply across the East Midlands for a further 100 years

Four examples of architectural designs at water and wastewater installations for Thames Water and the Olympic Delivery Authority

Preservation of an asset to provide a low-maintenance safe crossing of the reservoir for the public

Reservoir discontinuance – removing reservoir from the Reservoirs Act 1975 by excavation of over 20,000m3 of embankment fill

Safeguarding the water supplies to the UK’s second city

2 ML/d Actiflo® high rate sand ballasted clarification pilot plant part to validate a full scale plant designed to clarify the River Severn and the Elan Valley water

A vital new source of water to meet peak period demands in Lisburn and Belfast and help the existing network cope with any future emergency situations

Creation of a diverse, multi-stakeholder group charged with the task of transitioning Devon and Cornwall into a water sensitive region

Compliance with the Reservoirs Act (1975) provision of sufficient drawdown capacity

Tackling a nitrate problem using existing assets whilst maintaining operation of a town’s WTW

Off site MEICA Construction

An innovative solution for pH correction to maintain water quality for the City of Birmingham

£5m refurbishment project to an existing 33” precast concrete main in north Belfast, which was previously de-commissioned in the early 1980s

UV cryptosporidium inactivation project – the last of the ten AMP5 DWI regulatory outputs successfully achieved by South East Water

Testing of the Lower Greensand aquifer required constructing a 250m deep production borehole, monitoring boreholes and associated infrastructure

Increasing the spillway capacity of three historic impounding reservoirs within Dartmoor National Park

Providing a water treatment plant at Redhill Reservoir in Telford

New treatment works in the Go to Green programme using a single filtration stage with sand and Polarite media to reduce manganese levels

Largest anchoring scheme for Scottish Water

First ever precast spillway for Scottish Water

A low cost solution to trihalomethanes (THMs) in drinking water

Design and installation of a new chlorination system to prevent the invasion of extended colonies of zebra mussels

GAC pesticide control and capital maintenance project

3.7km pipeline to storage & transfer capacity and be prepared for development & population growth in the region

Nitrate reduction on one of Yorkshire Water’s key strategic water treatment works

AMP4 & AMP5 – summary and update

As its pioneering programme to install nearly 500,000 water meters draws to a close, Southern Water reports substantial benefits for company and customers

Wessex Water are providing additional security of supply and additional strategic storage within the water distribution network in West Dorset

Wessex Water’s 9km twin main is the first section of the trunk main to be installed in its flagship project

Innovative solutions to meet challenging site conditions and maintain compliance with the Reservoirs Act 1975

Ensuring the safety of toxic gas assets across Yorkshire

Victorian pumping station refurbishment within a Site of Special Scientific Interest

Pushing the boundaries of Building Information Modelling & precast concrete engineering in the water industry

Retrofitting an innovative enhanced coagulation and membrane solution within a small footprint

Refurbishment of a 1960s WTW has provided South East Water with an advanced, fully automated facility

£15.6m programme to install ultra-violet treatment plants at a number of strategic WTW sites

Delivering resilience to Severn Trent Water’s strategic grid

Portsmouth Water’s ‘well’ thought out solution to minimise the risk of groundwater ingress

Standardised modular approach to UV disinfection

Investigating and addressing deficiencies in the capacity of the overflow system

Future-proofing United Utilities reservoirs

Washwater treatment and sludge processing system improvements

Open heart surgery on the UK’s largest treated water aqueduct

£35m upgrade to reduce risk arising from the bulk storage of liquid chlorine, liquid sulphur dioxide and fuel oil

The Isle of Man is a self governing Crown Dependency which, through its ancient parliament Tynwald, enjoys a high degree of domestic legislative and political autonomy. Manx Utilities is a statutory board, charged with ensuring the economic, efficient and effective provision of the services and infrastructure necessary to meet the Island’s needs in terms of […]

Replacement of 1km of 3” asbestos cement main along the main street through Newton Poppleford in East Devon

Improvements to a 238 year old Derbyshire reservoir including an improved draw off system

Challenges faced on the £6m investment to augment the raw water supply to Derg WTW

The construction of a new water treatment works to serve the town of Southport and surrounding areas

Standardised modular approach to UV disinfection

Rare snail survives after completion of a 19km pipeline, transferring potable water between two Berkshire catchments

Scottish Water’s measures to ensure resilience of supply for customers in Dumfries and Galloway

Overflow chamber stabilisation

Modernising ageing water mains in Taunton and surrounding areas

A sustainable scheme to turn a liability into an asset suitable for redevelopment

Monitoring with fibre optics

Relining of 50km of 39” cast iron main by die drawing

Wessex Watre’s upgrade capacity by 5Ml to ensure security of supply and meet future area demands

Wessex Water’s 8-year programme to resolve resilience issues within the water supply network

A new grout curtain constructed beneath Wimbleball Dam has reduced leakage to the lowest recorded rate since construction

Installation of 32km of pipeline to support the Abberton Scheme

New pumping station to extract 120Ml/d of raw water from the River Stour to supply the Abberton Reservoir

South East Water has reduced average pressure by 17.7% and is saving 4.9 million litres of water daily

Relationship based approach adopted by South East Water and Jacobs leads to savings and efficiencies

The design and installation of water mains alongside the 2km dual carriageway diversion near Birmingham Airport

Ensuring Birmingham’s water supply is always on and good to drink

Raising the height of a reservoir and bell-mouth spillway required innovative thinking

Providing resilience in central Bristol through the installation of a new pipeline

Improving water quality in central Scotland

£9m investment offers security of supply and storage to 70,000 customers in North Wales

Upgrade to increase output and improve performance of non-potable WTW

Nitrates blending scheme to ensure Eyton boreholes remain a key part of the supply network

Securing supply to 40,000 residents in East Sussex

Ultra-filtration technology for the treatment of variable surface water quality

Sludge Treatment Reed Beds – Breaking new ground, a world first for a water treatment works

Concrete repairs to improve the life of the structure

Mitigation measure option appraisals to achieve good ecological potential for United Utilities water resource assets

AMP5 security of supply

‘Dark-side’ solution to reduce the level of THM’s at Highwood raw water storage facility near Southampton

Essential capital maintenance refurbishment of a strategic raw water supply

Replacement of two existing buried steel mains to protect reservoir embankment from risk of erosion

The original Llwyn Onn WTW was constructed during World War II, to supply water for a munitions factory in Wrexham. Water is abstracted from the Dee and pumped to the Marchwiel Reservoir before treatment at Llwyn Onn. Raw water quality is reliable, but the upland sources in particular result in high levels of manganese. Although […]

Building a complex hydraulic model of London’s strategic assets, including 4,000km of mains, 70 service reservoirs and over 100 pumping stations

Central London’s century-old cast iron water mains replaced by one of most challenging renewal programmes ever attempted

Process optimisation by the addition of prefabricated stainless steel rapid gravity filters

Refurbishment of a 100 year old pumping station to ensure reliability of supply for the next 25 years

Integration of ion exchange technology to counteract increasing nitrate concentration in source aquifer

Upgrade of physical and electronic security measures to strategic water assets across the Severn Trent region

Award winning project driven by BIM and innovation to deliver collaborative design and construction efficiencies

Improving the transfer of raw water to Bamford WTW in the Peak District

Improvement scheme involving the upgrade of existing facilities to incorporate a new nitrate removal facility

£33m AMP5 project to clean and refurbish 218km of trunk mains within Tyneside zone

£80m investment to upgrade over 1,000km of water mains across Northern Ireland

Carefully routed transfer scheme to maximise the use of existing Wessex Water assets

Wessex Water’s elimination of standalone sources

Increasing the capacity of Abberton Reservoir to meet the forecast population increase in Essex

Rebuilding York’s water treatment works

£14m investment to improve disinfection processes and aluminium removal performance

An innovative and considerate treatment enhancements project to maintain water quality

The restoration of Whicham Beck provides ecological benefits, risk reduction and reduced OPEX costs

Lowering a reservoir’s water level without introducing suspended solids into the water discharge

A challenging project to expand capacity at Sutton & East Surrey Water’s water storage & treatment asset

The first of 4 ultraviolet light installations for the treatment of Cryptosporidium

Treatment works extension and existing works improvements

£20.3 million investment to improve the water infrastructure in South Tyrone

48.5km of water mains replacement to reduce the risk of discoloured water

Climate change points to high turbidity, organic carbon levels and algal loads

A reservoir within a reservoir to improve Coventry’s water quality

Investing in a secure and futureproof water supply

The application of UV/peroxide advanced oxidation in combination with granular activated carbon

3,700 properties in Topsham and Exminster benefit from a secure and higher quality water supply

Edinburgh’s new £130m WTW is a feat of modern construction methods and sustainable engineering

Sludge treatment reed beds – a world first for a water treatment works

Spillway improvements and clay core raising

Southern Water’s water pipe flushing to remove iron deposits and other unwanted material

Cambridge Water Company (CWC) delivers potable water to approximately 300,000 customers spread over an area of 453 square miles in and around Cambridge. The water sources, with a maximum daily license output of 130Mld, are exclusively boreholes drawing water from a predominantly chalk aquifer where nitrate levels have been steadily rising over the past 30 […]

Fyne process removes colour and impurities from raw surface water with no environmental impact

Process upgrades to resolve manganese problems

Strong partnering ensures efficient delivery of a water supply scheme to satisfy the future growth of Shaftesbury

Works upgrade and cryptosporidium UV treatment

A complete redesign and rebuild in the confines of surrounding woodlands and narrow access roads

Design and installation of a geomembrane lining

New 35Ml/d DAF plant for the City of York

£1.75bn investment to meet the 2010-2015 business and regulatory objectives

Quality enhancements to 1,200km of water mains in Ayrshire through a variety of intervention techniques

The use of ultraviolet light for the treatment of Cryptosporidium

Predicting the impact of changing catchment management practices in the Anglian region

Collaboration with Severn Trent Water and the supply chain ensured success at Church Wilne

Upgrade with CoCoDAFF® and existing works refurbishment

£11.5m scheme to rehabiliate 30km of water mains in the Bridgwater area

Improving resilience of the Severn Trent Water strategic supply grid

Water abstraction from the River Arun safeguards supplies to customers in Sussex

New 5Ml service reservoir to maintain supplies to 12,500 customers in the Hindhead, Grayshott and Bramshott

Integration of a new counter current dissolved floatation and filtration (CoCoDaff) process into an existing works

Innovative pumping stations for abstraction of raw water from two flooded china clay quarry pits

Considerate construction in the Peak District National Park

Improvements to provide availability throughout the year

£30 million project to clean and refurbish 157km of trunk mains

New spillway to replace storm damaged overflow structure and prevent risk of dam water failure

‘Intelligent’ water meters employ Automatic Meter Reading (AMR) technology

A £1.4m cryptosporidium treatment scheme to safeguard drinking water quality

Wessex Water’s elimination of standalone source

The challenges met in delivering detailed design of the 55km pipeline

New water treatment works for the Inverness region

£8.8m pipeline scheme to improve South West Water’s security in supplying water

£15.5 million project to replace 57km of Victorian water mains in Brighton

Alternative to secondary treatment plant saves millions

Upgrade to the main source of potable water for Plymouth

Enhancement with DAF, RGF and Ultraviolet Disinfection

£125m investment to improve water supply to Scotland’s capital

Advanced WTW – three steps to ensure resilience

A £10m integrated solution to improve drinking water quality in the Scottish Borders

New service reservoir required to improve the security of supply

Nitrates removal scheme to meet regulatory compliance

£2.1m refurbishment scheme safeguard’s critical raw water supply for Plymouth

Additional treatment capacity and process improvements

Repairs to a remote reservoir in Cumbria

A 150,000 m3/day Reverse Osmosis Desalination Plant

Protecting unique habitat key focus for island project team

£7 million upgrade to improve quality and meet increased demand

£24m upgrade & refurbishment project

55km pipeline project to carry 100 million litres water daily

For growth in South and East Midlands

A new process for the lining of water and sewer pipes

Improved water treatment in the Elgin and east coastal area

Capital investment programme to upgrade existing water treatment works

£12.2m project to construct 2 reservoirs (22,5Ml) ensuring Thames Water meets the increased demands

£5.1m scheme to secure and improve water treatment for Dundee area

New 10Ml service reservoir constructed at Cranbrook

Quality and base amalgamation

Ozone system upgrade

Raw water colour reduction schemes

Combined upgrades to meet SOSI compliance

Quality water for Birmingham delivered through teamwork

Nitrate reduction project

Pipe production facility bringing major benefits to Edinburgh scheme

£4.3m upgrade scheme to improve water treatment in Fife

New River bromate removal scheme

£41m scheme to improve water treatment for Aberdeen

A strategic supply/demand scheme

Drainage and waterproofing of a critical service reservoir near Hull

Innovative ACWA NITREATTM plant future proofs WTWs against anticipated increase in nitrate levels

B&V demonstrates the effectiveness of a fully integrated consulting and construction business

Directive to reduce the concentration of iron and manganese

Pumps and HV switchgear replacement

WTW upgrade with steel tank dissolved air flotation and rapid gravity filtration

Reducing the risk of cryptosporidium outbreaks at two WTWs

Opportunities for pressure reduction within the network deliver cost-effective savings

UK’s first ever PPP for the bulk supply of potable water serving almost 50% of Northern Ireland’s population

New plant constructed within existing slow sand filter

A £2.2M Sludge Treatment System Upgrade

Refurbishment of service reservoir to prolong operational life

Innovative solutions with a joint delivery team environment

Water quality improvements scheme for United Utilities

Removing nutrients from river water for reservoir recharge

New water main between Bray WTW & Surrey Hill Reservoir

Combined quality and capital maintenance project

£15.5 million project to replace 56.6km of Victorian water mains

Improved security of supply to two Yorkshire areas

Installation of new water process plant and extensive main laying

£7.5m project to upgrade water quality in Ayrshire

New underwater pipelines bring more water to Isle of Wight

Improving water quality for the population of the Isle of Man

DAF upgrade

Process upgrade to increase output

Improved water treatment in the West Highlands

Pesticide removal by adsorption onto granular activated carbon

Gatehampton to Oxford – new pipeline to secure supply

700,000 residents of Greater Glasgow delighted with new works

£2.2m project improves Highlands water quality

£5.5 million regional water supply project

Treatment works upgrade project for Essex & Suffolk Water

£7.6m project to bring water quality improvements to Fife

Challenges for 15 Ml/d plant on Guernsey

N Ireland’s £16m North Down Trunk Mains Project

Maximum output needed increase from 13Ml/d to 16 Ml/d

Capital investment at service reservoirs in Yorkshire

Reduction of manganese & geosmin deposits in supply networks

Stoke Ferry to Downham Market & Beck Row to High Fliers 18” reinforcement

Sutton Bingham Dam remedial work

Extensive Victorian mains replacement underway in the Capital

134km aqueduct supplying major city – refurbishment story continued

Increased capacity and process stability

£5.2m scheme brings improved treatment in Scottish Highlands

Granular activated carbon adsorbers – pesticide removal scheme

£80m investment to upgrade over 800kms of varied water mains

Turbidity removal scheme

Installation of new nitrate treatment plant

In-situ structural secondary lining of existing tunnel

30Ml/d works using submerged membranes & UV disinfection

Reservoir becomes part of Bristol Water Northern support scheme

Refurbishment for Dee Valley Water

Yorkshire Water’s £70m capital investment

Major new pipeline commissioned early in Northern Ireland

Trihalomethane reduction scheme

£38m scheme to improve water supplies in Aberdeen

Design & implementation of SCADA control & data acquisition system for Jersey Water

£6.4m upgrade for waterworks serving 200,000 population

£8.4 investment improves quality

£25m works rebuild by Wessex Water

Rebuilding reservoir in area of outstanding national beauty

Increases security of supply & maximises economical operation

Nutwell WTW and Doncaster area strategy

Northern Ireland upgrades 50% of water treatment capacity

Upland sources to be fully utilised if demands during a drought were to be met

Increasing overall capacity of works and improving process

Treated water and chlorination AMP4 improvements

Installation of new nitrate treatment plant

Changing water quality standards for some 700 properties

Thames Water’s web-based water pressure software tool for tall buildings

Inspection & refurbishment as part of major programme

Groundwater sources in Area of Natural Beauty

Rectifying low-level bacterial failures

Final cost achieved £1.836m opposed to Capital provision £3.2m

Yorkshire Water invest £14 million to achieve compliance & security of Bridlington supply

A case of ‘environmental Sudoku’

New £10m WTW for Crossmaglen & district

Record race against time to secure London’s water supply

First new surface water treatment works in London for 13 years

High tech in the countryside

One of the most unique water treatment works ever built

New service reservoir for Mid-Kent Water

£8.6m WTP adding treatment line to meet environmental challenges

Trihalomethane Compliance

£3.8m primary filter conversion for Essex & Suffolk Water

Replacement disinfection scheme

Pesticide & trihalomethane reduction scheme

A £1.8m quality compliance project

Iron and manganese removal scheme

Safeguarding city of Bath water supply during future droughts

New lease of life for 400 year old water supply aqueduct

Nitrate removal plants being installed at six Anglian WTWs

New borehole to supply 4.25Ml/d to drought stricken Essex

“Plumbo” scheme – excellent example of successful alliancing

£8.6m budgeted project at critical works

Water mains renewals – a challenge in historic centre

To boost existing water supply during peak periods

Major investment improves IOM water treatment infrastructure

Includes development of three new on-site boreholes

First submerged membrane plant for Three Valleys Water

Resolving existing operational water supply problems

6.6Ml/d WTP can be deployed in four shipping containers

Brings 11% cost savings to Mid Kent Water

Adding a third clarifier stream & 10Ml/d reservoir

Engineering award claim for upgrade in tranquil beauty spot

Darent Alf, restoring flows in the River Darent

Hydro power station at works inlet offsets 30% energy needs

Wessex Water Services AMP 4 programme

Removal of cryptosporidium risk

Fyne membrane plant in a pre-fab building speeds installation

£9.1m scheme for increased output & reduced compliance risk

Intensified DAF process helps increase capacity

Successful trials by South East Water

Curing shortfall now & catering for predicted 25 years growth

Setting ‘new standards’ for water distribution

Water quality improvements, Ellesmere Port, Cheshire

£1.8 million reservoir to safeguard supply