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Severn Trent

Severn Trent supplies water to 7.4 million people, and sewerage services to 8.5 million people over an area of 21,000 square kilometres in central England and mid-Wales.

The company operates 181 water treatment works and 1,017 sewage treatment works and has 46,000 km of water mains and 54,000 km of sewers. Every day the company supplies approximately 1,900 million litres of water, and treats around 2,500 million litres of wastewater.

Lower Gornal STW (2024)

Tertiary treatment upgrades implemented to achieve tightened phosphorus and ammonia consents

Melton Mowbray STW (2024)

Construction of a new EBPR process stream operating in a UCT configuration and updating existing assets to improve the quality of the effluent

Monkmoor STW (2024)

UK’s first large-scale installation of MABR technology to enhance ammonia removal

Newthorpe STW (2024)

Improving sustainability & resilience of sewage treatment in the Erewash Valley

Witches Oak Raw Water Pumping Station (2024)

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

Witches Oak WTW: Green Recovery - Decarbonising Water Resources (2024)

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

Finham Advanced Anaerobic Digestion (2023)

Finham STW, situated near Coventry in the West Midlands, is Severn Trent’s fifth largest wastewater treatment works and treats over 115 megalitres of effluent a day from half a million people. The works processes indigenous sludge on site as well as accepting exports from local, satellite sites, producing final effluent, ‘cake’ and biogas as outputs. […]

Kinnerley WTW (2023)

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 […]

Newthorpe STW (2023)

North-west of Nottingham and separated by the River Erewash, two of Severn Trent’s sewage treatment works are situated within 2.5km of each other; part of the legacy of the times of the public statutory undertakers. Heanor Milnhay STW in Derbyshire has a dual-stream process, with part of the flows going through trickle filters and the […]

Roundhill & Lower Gornal STWs (2023)

Roundhill Sewage Treatment Works (STW) is a large wastewater treatment site in the Severn Trent region serving Stourbridge and the surrounding area. It treats a flow to full treatment (FFT) of 1781 l/s and a population equivalent (PE) of around 300,000. The works was extensively rebuilt around the year 2000, with the large rectangular biofilters […]

Stroud Sewerage Strategy Project: Part 2 (2023)

The Stroud Sewerage Strategy is a major investment by Severn Trent which is required to overhaul of the existing sewer network by installing almost 3.5km of enlarged sewer pipe, separating surface water from the sewage network, creating additional storage with smart controls to hold stormwater back during large storm events before returning it to the […]

Witches Oak WTW: Green Recovery - Decarbonising Water Resources (2023)

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 […]

Buxton STW (2022)

Improving phosphorus performance and providing treatment resilience using preliminary and primary treatment for an existing MBR on a space constrained site

Cannock STW (2022)

Enhanced river quality by utilising CoMag® ballasted enhanced settlement technology to remove phosphorus

Edale Mill Cottages STW (2022)

Edale Mill Cottages Sewage Treatment Works is located in the heart of the Peak District National Park and serves a small community comprising 29 properties. The asset expired biofilter works and septic tank was process and hydraulically undersized and had been a source of odour complaints for the close neighbours for a number of years. […]

Haxey-Graizlound STW (2022)

Located in Lincolnshire east of Doncaster, Severn Trent’s Haxey-Graizlound Sewage Treatment Works (STW) serves a residential population equivalent of 5,169 with no trade loads within the catchment. The works receives pumped flows from two pumping stations located in the catchment. The present permit is BOD 25mg/l, suspended solids 45mg/l, ammonia 15mg/l with a dry weather […]

Papplewick Borehole Pumping Station (2022)

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 […]

Severn Trent Borehole Capital Maintenance (2022)

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 […]

Stoke Bardolph STW - Anaerobic Digestion (2022)

Stoke Bardolph Sewage Treatment Works (STW) is Severn Trent’s second largest STW and serves a population of c. 620,000. The site is also a major regional sludge centre, meaning it takes a high volume of sludge imports from other sites in the region. Stoke Bardolph has a sludge treatment capacity equivalent to a population of […]

Strongford STW - THP & LTP (2022)

Strongford STW is a major sewage treatment works serving the population equivalent of circa 350,000 from Newcastle-under-Lyme and Stoke-on-Trent. The site’s sludge treatment facility provides a major centre for regional operations. Based on a forecast increase in population, it was identified that an increase in treatment capacity would be required to accommodate the local growth. […]

Stroud Sewerage Strategy Project: Part 1 (2022)

Stroud is located in Gloucestershire near the southern boundary of the Severn Trent region between Gloucester and Bristol. The catchment is a mix of urban and rural areas and has a population of circa 67,000. The sewerage network is primarily a combined network with Wallbridge Combined Sewer Overflow (CSO) being a key asset close to […]

Teversal S101a - First Time Sewerage Scheme (2022)

In September 2014 Severn Trent received an application under Section 101A of the Water Industry Act to provide first time sewerage to 11 properties in the Nottinghamshire village of Teversal. The outcome of an assessment of the existing sewerage provisions identified environmental or amenity problems at 18 properties and concluded that the provision of a […]

Ashbourne STW (2021)

Ashbourne Sewage Treatment Works (STW) in Derbyshire serves a population equivalent of 48,259 from both domestic customers and a high trade load, primarily from poultry processing. There has been a works in this location since the 1930s, with existing processes including inlet pumping, 2mm fine screening, grit removal, primary settlement, secondary treatment through an oxidation […]

Kineton STW (2021)

The Kineton STW required investment in AMP7 due to the introduction of a 0.5mg/l total phosphorus effluent limit, which comes into force by the end of December 2021. The new works is designed to cater for flows from Kineton, Butlers Marston and Radway equating to a combined design horizon population equivalent of 3,946. The existing […]

Ledbury & Brockhampton STWs (2021)

Both Ledbury and Brockhampton are medium sized works (c15,000 PE) serving the catchments of Ledbury and Cheltenham respectively. Each site was subject to a first-time phosphorus permit with Brockhampton receiving higher flow to full treatment and a tighter BOD permit, and Ledbury having significant growth projected in the catchment. Both sites both required new tertiary […]

Lowdham, Gunthorpe Road, Flood Alleviation (2021)

Lowdham is a village in Nottinghamshire that had a history of external and internal sewer flooding to properties, caused by hydraulic incapacity of the combined sewer network. A new 1400m3 offline storage tank was required along with catchment resilience work, which included working in partnership with the local authority to resolve surface water flooding, by […]

Poolend Borehole Capital Maintenance (2021)

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 […]

Severn Trent Eels Regulation Compliance (2021)

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 […]

Uckington Water Treatment Scheme (2021)

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 […]

Walton S101a - First Time Sewerage Connection (2021)

The picturesque village of Walton is located within the heart of Warwickshire adjacent to the River Dene. The existing privately owned sewage treatment facility located on the bank of the River Dene was life expired and would often flood, resulting in pollution to the river. An application was made to Severn Trent under Section 101a […]

BRP - Elan Valley Aqueduct - Birmingham Resilience Project (2020)

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 […]

BRP - Raw Water Project - Birmingham Resilience Project (2020)

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 […]

BRP - Treated Water Project - Birmingham Resilience Project (2020)

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, […]

Brancote Sludge Treatment Centre (2020)

Located to the east of Stafford, Severn Trent’s Brancote Sewage Treatment Works (STW) catchment will see an increase in population from 78,075 current population equivalent (PE) to 85,532 by 2028. The site is split into two distinct areas with the STW processing the sewage flows from within its own catchment and the sludge treatment centre […]

Church Wilne WTW (2020)

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 […]

Ketford Borehole Pumping Station (2020)

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 […]

Kirk Hallam, Abbott Road, Flood Alleviation Scheme (2020)

Kirk Hallam is a village on the outskirts of Ilkeston, Derbyshire in the East Midlands. It had a history of internal and external property flooding from the sewerage network in three separate locations within the catchment. Severn Trent (ST) appointed nmcn PLC (now Galliford Try) as the design and build contractor under the AMP6 framework […]

Newark Waste and Water Improvement Project (2020)

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 […]

Nottingham, Shakespeare Street, Flood Alleviation (2020)

Shakespeare Street in Nottingham is situated at the heart of Nottingham Trent University campus, a short walk from the main square in the city centre. The basements of a number of buildings in the area suffered repeat sewer flooding, ranking inside the top 1% of all flood risks across the Severn Trent (ST) region. In […]

Rugby STW - BioMag Plant (2020)

Rugby STW is situated on the south bank of the River Avon, approximately 1km north of the town of Rugby in Warwickshire. Final effluent from Rugby STW is discharged into the River Avon and needs to meet permits set by the Water Framework Directive (WFD). It provides sewage treatment to a population of circa 107,975. […]

Upperwood S101a - First Time Sewerage Scheme (2020)

As part of Severn Trent’s ongoing duty to provide public sewers under section 101A of the Water Industry Act 1991 (S101a), nine properties in the hamlet of Upperwood, Matlock Bath, required connection to such a system. These properties were served by private septic tanks, discharged into the limestone aquifer below. Severn Trent appointed Galliford Try […]

Zouch S101a - First Time Sewerage Scheme (2020)

Zouch is a small hamlet situated along the A6006 on the border of Leicestershire and Nottinghamshire and consists of 43 properties that had no access to public sewerage. Due to the canalisation of the River Soar, the hamlet is entirely surrounded by water with the main River Soar to the South and the navigable Zouch […]

Barston STW (2019)

Barston Sewage Treatment Works (STW) is one of Severn Trent’s medium sized treatment works. The site is located to the east of Birmingham in the West Midlands. The STW treats foul water for the catchment serving Solihull, Shirley, Knowle and other outlying conurbations. It currently serves a population of 39,741 which will increase to 76,036. […]

Battlefield Brook Fish Passage (2019)

Battlefield Brook catchment encompasses farmland, Catshill Marsh (which used to be a Site of Importance for Nature Conservation; SINC), urbanised reaches adjacent to the M5 and Sanders Park; a public amenity facility owned by Bromsgrove District Council. The section of the brook through Sanders Park was lined with concrete in the 1960s. Despite its urbanised […]

BRP - Treated Water Project - Birmingham Resilience Project (2019)

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 […]

Blythe & Bourne Fish Passage (2019)

The River Blythe is a tributary of the River Tame east of Birmingham – neither of the rivers are at good ecological status. Although reasons for failure under the Water Framework Directive (WFD) are complex, the Environment Agency (EA) identifies barriers to fish and eel passage as part of the problem. Severn Trent has gravity […]

Boughton STW (2019)

Boughton STW is a medium sized sewage treatment works serving a population equivalent of approximately 13,000 located about 8 miles south-east of Worksop in Nottinghamshire. As part of Severn Trent’s commitment to the Water Framework Directive (WFD) to improve the quality of waterbodies in the region within AMP6, Boughton STW was highlighted to accept a […]

Codsall STW (2019)

Severn Trent (ST) and Hafren Dyfrdwy (HD) have been challenged to meet a large number of new, tight phosphorus permits as a result of the Water Framework Directive (WFD). Historically, only Total-P levels down to 1 mg/l have been enforced by the Environment Agency, but in AMP6 and AMP7 a big step change in expectations […]

Coleshill FWAD Biomethane Scheme (2019)

The Coleshill Food Waste Anaerobic Digestion Plant processes 48,500 tonnes per annum of food waste collected generally within 30 miles of the site. The site has been in continuous operation since January 2015 when it first received commercial customers. It is currently estimated that this project can deliver 5.5GWh per annum (electrical equivalence) of new […]

Crankley Point Terminal Pumping Station (2019)

Crankley Point Sewage Treatment Works (STW) is a Severn Trent asset serving Newark-on-Trent, a town in Nottinghamshire with a population of just under 30,000. As part of the £60 million Newark Waste and Water Improvement Project, a new terminal pumping station (TPS) and screening chamber (SC) with outfall to the River Trent was required to […]

Cropwell Bishop STW (2019)

Located to the south-east of Nottingham, Severn Trent Water’s Cropwell Bishop Sewage Treatment Works (STW) serves 700 residential premises in the village and a number of local businesses, including the Cropwell Bishop creamery, which contributes a significant phosphorous loading to the catchment. It also receives pumped sewage flows from the adjacent village of Cropwell Butler. […]

Earl Shilton STW (2019)

Earl Shilton Sewage Treatment Works (STW) is situated in south west Leicestershire and serves a population equivalent of 11,833 comprised mainly from domestic sources from Earl Shilton and Barwell. There has been a STW in this location since the 1960s and the current process workstream includes preliminary treatment, primary settlement, secondary filtration, secondary settlement and […]

Finham STW Activated Sludge Plant (2019)

Finham Sewage Treatment Works (STW) serves a population equivalent of 430,470 for Coventry and its environs. The existing processes include preliminary treatment, primary settlement, a plug flow activated sludge plant (ASP) and final settlement tanks. The site is also a sludge reception centre and has the capability to treat indigenous and imported sludges. The sludge […]

Goscote STW (2019)

Goscote STW is an activated sludge process (ASP) works located near Walsall in the West Midlands which serves a population equivalent (PE) of 120,806 (including trade). The site discharges into the River Tame catchment. Its upgrade was key to meet a tighter environmental permit in AMP6, being 10 mg/l BOD, 1.3 mg/l ammonia and 0.2 […]

Gulson Road (Coventry) Sewer Diversion (2019)

As part of the ongoing growth of Coventry University, an existing builder’s merchant yard situated off Gulson Road provided a developer with the ideal city centre plot to construct an extensive eight-storey student accommodation building. The brownfield site redevelopment required an existing Severn Trent owned trunk sewer to be diverted prior to the construction work […]

Mansfield, Gunthorpe Court, Flood Alleviation (2019)

A £940k flood alleviation scheme has been successfully completed in Nottinghamshire. Mansfield, Gunthorpe Court, was a scheme designed to tackle insufficient stormwater capacity which was causing internal and external flooding to numerous properties in the area. Part of the solution was to provide 480m3 of storage by converting an existing pedestrian subway into an attenuation […]

Minworth STW - Curdworth Sludge Lagoons (2019)

The Curdworth Sludge Lagoon is located within Severn Trent’s Minworth STW site, alongside the Minworth Final Effluent Channel situated to the north and the River Tame to the south. It was constructed during the early 1900s. Filling operations ceased during the late 1940s and it has remained in its current state since that time. The […]

Mythe WTW (2019)

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 […]

Slimbridge Infiltration Reduction (2019)

In 2013, two villages in Gloucestershire; Slimbridge and Cambridge, were identified by Severn Trent to be suffering from significant infiltration of groundwater. The Slimbridge and Cambridge catchment is home to approximately 1,136 people (2011 census) and contains an ecologically important wetland. Both villages have historically high groundwater levels and extensive CCTV footage of mainline, lateral […]

Uttoxeter STW (2019)

Situated in Staffordshire, close to the Derbyshire border, Uttoxeter STW serves a mainly domestic population from the town itself. Following catchment modelling, it was determined that there will be significant growth in the population, reaching 24,498 population equivalent in 2035. This increased population would mean that the existing inlet works would not have sufficient capacity […]

Walsall Wood STW (2019)

Walsall Wood Sewage Treatment Works was a trickling filter site discharging into the Ford Brook, part of the River Tame catchment. Under the new Water Framework Directive, the site was required to comply with stringent new standards for phosphorus and ammonia levels in wastewater (BOD: 10 mg/l, NH3: 1.9 mg/l, Total P: 0.5 mg/l). The […]

Audley Borehole Pumping Station (2018)

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 […]

BRP - Elan Valley Aqueduct (Nantmel and Frydd Wood) - Birmingham Resilience Project (2018)

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 […]

BRP - Elan Valley Aqueduct (Severn Siphon) - Birmingham Resilience Project (2018)

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 […]

BRP - Raw Water Project - Birmingham Resilience Project (2018)

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 […]

BRP - Treated Water Project - Birmingham Resilience Project (2018)

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 […]

Cowleigh Distribution Service Reservoir & Lower Wyche Pipeline (2018)

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 […]

Hagley (Newfield Road) Flood Alleviation (2018)

The small town of Hagley, Worcestershire is served by an ageing sewer network which drains the wastewater of the 6,000 inhabitants towards the large Milestone Drive Sewage Pumping Station. Following decades of growth, misconnections and increased urbanisation within the existing catchment, hydraulic pinch points on the foul sewer network subjected numerous clusters of low-lying properties […]

Hanchurch Service Reservoir (2018)

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 […]

Melbourne WTW - High Lift Pump Sump Bypass (2018)

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, […]

Melbourne WTW - Clarification & Coagulation (2018)

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 […]

Minworth STW - ICA Enablers Scheme (2018)

Minworth is Severn Trent Water’s (STW) largest sewage treatment works serving an population equivalent (PE) of 1.75 million from Birmingham, with a full flow to treatment of 1,070Ml/d. The plant treats sludge from a PE of 2.3 million, which is made up of indigenous sludge plus imported sludge. As part of Severn Trent’s Capital Investment […]

Minworth STW - Thermal Hydrolysis Plant (2018)

Minworth STW is Severn Trent’s largest sewage treatment works and serves a population equivalent of 1.75 million from Birmingham with full flow to treatment of 1,070Ml/d. The works treats sludge arising from a population equivalent of 2.3 million which is made up of indigenous sludge plus imported sludge from the nearby Coleshill STW and various […]

Ogston WTW (2018)

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 […]

Pebworth-Long Marston-Stratford upon Avon Transfer (2018)

Long Marston Sewage Treatment Works (STW) is located approximately 4 miles south of Stratford-upon-Avon in Warwickshire and until recently was treating wastewater from a population of 2,500 in Long Marston and Quinton. Significant development in the catchment will see the population served rise to approximately 15,000 over the next 20 years. The former Ministry of […]

Stanford Reservoir Spillway Extension (2018)

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 […]

Stoke Bardolph - Energy Crop AD Plant (2018)

In August 2010, Severn Trent commissioned its energy crop anaerobic digestion plant at Stoke Bardolph, Nottingham. It was built to help power the nearby sewage treatment works using crops grown on contaminated farmland which is not suitable for food production. The energy crop plant was sized to convert 37,000 tonnes of maize silage each year […]

Strongford STW - THP (2018)

Strongford STW is located at the north west end of Severn Trent’s region and covers a significant catchment in and around Stoke-on-Trent with a population equivalent of 350,000. The Strongford digestion plant currently processes 34 tonnes dry solid per day (tds/day) indigenous; and 14 tds/day liquid imports which includes 7 tds/day from the recently closed […]

Ambergate Strategic Service Reservoir Renewal: Phase 2 (2017)

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 […]

BRP - Elan Valley Aqueduct (Bleddfa) - Birmingham Resilience Project (2017)

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 […]

BRP - PAC Dosing System - Birmingham Resilience Project (2017)

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 […]

Heanor Breach Road Flood Alleviation Scheme (2017)

Severn Trent Water has completed the £1m Heanor Breach Road Flood Alleviation Scheme which will reduce the flooding witnessed by numerous properties on Breach Road, Heanor. The scheme works by quickly conveying the combined sewer water away from the properties at risk of flooding and safely storing it in a 163m long 2.1m diameter tunnel. […]

Howden Mini Hydro Electric Project (2017)

Howden Reservoir is the first of three reservoirs owned by Severn Trent Water in the Upper Derwent Valley. The reservoir is bounded at its southern end by Howden Dam which impounds the River Derwent and overflows to Derwent Reservoir which in turn overflows to Ladybower Reservoir. Work commenced on the dam’s construction on 16 July […]

Linnet Rise Flood Alleviation scheme (2017)

The complexity of the flooding issues associated with the low lying properties on Linnet Rise was investigated following secured funding from Severn Trent Water. Under the AMP6 framework agreement NMCNomenca (now Galliford Try) was appointed as design and build contractor and worked closely with the STW solution team to develop the best TOTEX solution for […]

Minworth STW - Thermal Hydrolysis Plant (2017)

Minworth STW is Severn Trent Water’s largest sewage treatment works and serves a population equivalent of 1.75 million from Birmingham with full flow to treatment of 1,070Ml/d. The works treats sludge arising from a population equivalent of 2.3 million which is made up of indigenous sludge plus imported sludge from the nearby Coleshill STW and […]

Netheridge STW (2017)

Netheridge Sewage Treatment Works (STW) is one of Severn Trent Water’s key sites in the south west of the region serving the city of Gloucester, discharging final effluent to the River Severn. The works currently serves a population equivalent of 197,940 which is predicted to increase to 218,815 by the 2034-35 design horizon. The site […]

Papplewick Borehole Pumping Station (2017)

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 […]

Poolend & Highgate pH Correction & Plumbosolvency (2017)

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 […]

Retford STW (2017)

Retford STW is located to the north of the town of Retford, Nottinghamshire. It serves a population of approximately 26,000. The project was to address capital maintenance works which includes the replacement/refurbishment of expired life items and the addressing of operational risks. The inlet works screens were capturing approximately 15% rags which was creating a […]

Salford Priors S101a - First Time Sewerage Scheme (2017)

An application for first time sewerage has been made under Section 101A of the Water Industry Act 1991. The application requests Severn Trent Water (STW) provide access to a public sewer for 28 duty (polluting) properties in the Iron Cross, Rushford and Pitchill settlements in the area to the west of Salford Priors, Warwickshire. An […]

Severn Trent DG2 Small Pumps Project (2017)

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 […]

Shirebrook STW (2017)

Shirebrook STW is located approximately 5 miles north of Mansfield town centre and caters for a population equivalent (PE) of 12,000. As part of the AMP6 Chemical Investigations Programme, Severn Trent Water is required to carry out a full scale trial of a ‘proprietary’ iron dosed sand filter plant on a works serving between 10,000 […]

Wallgrange Solvents and pH Improvements (2017)

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 […]

Bakewell STW - Activated Sludge Plant (2016)

Bakewell is located in the heart of the Peak District National Park and as such attracts thousands of visitors each year. Bakewell is a thriving town with a cattle market that trades every Tuesday, a showground that hosts numerous national events each year and is a great base to explore the surrounding National Park. Bakewell […]

BRP – Challenges - Birmingham Resilience Project (2016)

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 […]

BRP - Treated Water Project - Birmingham Resilience Project (2016)

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 […]

BRP - Trimpley WTW Trials - Birmingham Resilience Project (2016)

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. […]

Blymhill STW (2016)

Blymhill STW is a small rural RBC and reed bed STW based in south Staffordshire which treats flows from a PE of about 551. This was set to increase to a design population of 844 PE due to predicted non-residential domestic load. The catchment consists of several individual villages, plus the non-domestic contribution from Weston […]

Garendon Green (Loughborough) Flood Alleviation (2016)

Garendon Green is a residential street situated approximately 1km to the west of Loughborough town centre, north of the university and west of the hospital. Garendon Green runs parallel to the Burleigh Brook into which the local surface water drainage outfalls. The combined sewer discharges into the main Loughborough trunk sewer approximately 1,300m downstream. In […]

Gloves Lane (Blackwell) Terminal Pumping Station (2016)

Blackwell is a large village in the northeast of Derbyshire, close to the town of Alfreton, with a population of approximately 3,000 people. Within the village, at the bottom of the narrow Gloves Lane, Severn Trent Water’s terminal sewage pumping station (TPS) receives significant incoming flow from not only the village itself but also the […]

Hassocks Lane (Beeston) Sewer Requisition (2016)

Bellway Homes Ltd submitted an application for foul and stormwater sewers requisition under Section 98 of The Water Industry Act 1991 for a new housing development in Beeston, Nottingham. With no pre-existing drainage on the site it was necessary for the drainage from the 128 new properties to extend across 3rd party land and into […]

Kelham Road (Newark) Flood Alleviation Scheme (2016)

As a result of long term flooding problems in Newark, Severn Trent Water set up and now chair the Newark Flood Forum in order to work closely with national and local government agencies and the wider Newark community, including those directly affected by flooding. The purpose of the forum is to ensure that the views […]

Little Eaton WTW (2016)

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 […]

Llandinam Resilience Scheme (2016)

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, […]

Sotshole (Heage) Sewage Pumping Station (2016)

Severn Trent Water’s (STW) Sotshole Sewage Pumping Station is situated between the village of Heage and the town of Belper, Derbyshire. The existing pumping station serves approximately 330 individuals from the surrounding residential area and is comprised of a wet and dry well topped by a brick superstructure. The emergency overflow chamber is located within […]

South East Coalville Growth Scheme (2016)

North West Leicestershire District Council’s long term housing proposals include an allocation of 3,200 dwellings to the south east of Coalville. Without sewer capacity improvements the additional flows will increase flood risk and combined sewer overflow (CSO) spills and so proactive capacity improvements are required to meet Severn Trent Water’s AMP6 outcomes to ‘safely take […]

Ambergate Service Reservoir (2015)

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

BRP - Trimpley WTW Trials - Birmingham Resilience Project (2015)

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

BRP - Overview - Birmingham Resilience Project (2015)

Safeguarding the water supplies to the UK’s second city

Coningswath Road (Carlton) FAS (2015)

£2.3m project to alleviate foul and surface water sewer flooding

Frankley WTW - Limewater Plant (2015)

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

Holt Drive (Loughborough) FAS (2015)

£1.65m project to remove properties from FLOODS register, reduce highway flooding, and improve the amenity value/diversity

Hulland Ward STW (2015)

Installation of a constructed wetland as a full treatment facility using the Phragmifiltre® system

Lilleshall Nitrate Improvement Scheme (2015)

Providing a water treatment plant at Redhill Reservoir in Telford

Minworth STW - Biomethane Injection Plant (2015)

Improving the efficiency of energy generation from sewage sludge by cleaning and injecting biogas into the National Grid network

Private Drain & Sewers (2015)

Delivering upgrades to pumping stations in preparation for legislation change in 2016

Ravenfield Sewage Pumping Station (2015)

A complete overhaul of an operational site on time, on budget and with zero defects

St Judes Way (Rainworth) FAS (2015)

Sewer enlargement in Rainworth to alleviate foul and surface water sewer flooding of private properties

e5 Programme - Worksop STW Northern Area Sludge (2015)

New acid phase digestion plant constructed to treat imported sewage sludge arising from the largely rural catchment of Severn Trent Water’s northern area

Billesdon (Church St) FAS (2014)

An acrylic polymer injection system was utilized in areas of running sand to improve ground conditions

e5 Programme - Clay Mills STW (2014)

Optimising the sludge treatment facilities with an innovative ‘bagel’ acid phase digester

Cressbrook STW (2014)

A technically challenging project, with significant ecological, environmental and geographic constraints

Derwent Valley Aqueduct (2014)

Delivering resilience to Severn Trent Water’s strategic grid

Edale STW (2014)

Reducing the impact of a large tourist population whilst ensuring that consent was not compromised

Emergency UV Treatment Plant (2014)

Standardised modular approach to UV disinfection

Hassop Sewerage Scheme (2014)

First time sewerage within the Derbyshire village including gravity sewers and a new RBC treatment plant

Minworth STW - CHP Replacement (2014)

Installation of three new combined heat and power units

Overseal STW (2014)

Scheme to treat wastewater in line with consent requirements for phosphorus, BOD and ammonia under the EU Habitats Directive

Sewage Pumping Station Programme (2014)

Upgrade of 21 SPSs by a collaborative team working to embrace the knowledge base and proactively manage risks.

Shelton WTW UV Scheme (2014)

Standardised modular approach to UV disinfection

e5 Programme - Stoke Bardolph STW - Centrate Project (2014)

First UK installation to utilise the Phospaq, UASB+ and Anammox technologies in a single process solution

e5 Programme - Strongford STW (2014)

Restoring digestion efficiency and achieve phosphorus permit compliance

e5 Programme - Wanlip STW - Inlet Works (2014)

Replacing two existing inlet works with a single process improves the reliably & effectiveness of preliminary treatment

e5 Programme - Wanlip STW - Sludge Project (2014)

New sludge digestion facility with an increased treatment capacity

Welshpool STW (2014)

Reducing risk and maximising the gains of innovation in the delivery of a new oxidation ditch plant

Armthorpe STW (2013)

IFAS process within an existing structure removed the need for extensive new build

Barnby Moor SPS (2013)

Refurbishing an existing asset that had reached the end of its working life presented a number of core challenges

Birdlip STW (2013)

Construction upgrade encompassing the installation of new RBC and aerated reed beds in Gloucestershire

Birmingham (A45) Water Mains Diversions (2013)

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

Birmingham Water Treatment (2013)

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

e5 Programme - Clay Mills STW (2013)

Innovative approach to design and construction of the new Bio-P activated sludge plant

Coventry Road (Hinckley) FAS (2013)

Large scale initiative of advance customer communication & stakeholder management is key to success

Eltham Road SPS & Rising Main (2013)

Renewal of 2.8km, asset life expired, rising main from West Bridgford SPS to Nottingham trunk sewers

Eyton Nitrates Blending Scheme (2013)

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

Hassop WwTW (2013)

A new single-piece plant to meet Severn Trent Water’s extremely stringent requirements

Phosphate Removal Batch Schemes (2013)

Realising efficiencies by batching four Severn Trent Water sites with chemical dosing plant issues into one contract

Reservoir SEMD Upgrade Project (2013)

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

River Ashop & River Noe Silt Issues (2013)

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

e5 Programme - Rushmoor STW (2013)

An e5 alliance major projects programme scheme to upgrade the existing sewage treatment works

Shiffords Bridge Nitrate Improvement Scheme (2013)

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

e5 Programme - Stoke Bardolph STW - Phosphorus Removal (2013)

A holistic approach to meet future phosphorus consents

Bamford WTW (2012)

An innovative and considerate treatment enhancements project to maintain water quality

Buxton Critical Sewer Rehabilitation Scheme (2012)

Rehabilitation of sewers, coordinating with four separate contractors to minimize impact on the public

Coalport STW (2012)

Primary treatment and activated sludge plant improvements

Coundon Reservoir (2012)

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

e5 Programme - Major Projects Overview (2012)

Severn Trent Water’s innovative programme delivery models

Minworth STW - Anammox Plant (2012)

The first UK Anammox® plant to yield an environmentally friendly biological phosphorous solution

Mythe WTW FAS (2012)

Severn Trent Water invests £5.5m to secure Gloucestershire’s water supply

Sawley Road & Nooning Lane Defective Rising Main (2012)

Replacement of 6km rising main with PE100 across open countryside including lining and no-dig sections

Willenhall UID (2012)

Major water quality improvements to the River Tame catchment, focusing on innovation and sustainability

Church Wilne WTW (2011)

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

Derwent Valley Aqueduct (2011)

Improving resilience of the Severn Trent Water strategic supply grid

Gobowen Pumping Station & Rising Main (2011)

New sewage pumping station and rising main increases capacity and reliability

Leamington Sewerage Strategy (2011)

Strategic project to increase capacity, alleviate the risk of sewer flooding & improve water quality

Llangadfan Catchment Pumping Stations (2011)

New pumping stations and mains to replace an outdated system in mid-Wales

Meden Vale FAS (2011)

Innovative techniques and products reduce flooding, and health, safety & environmental risks

Minworth STW - Sludge Dewatering (2011)

An environmentally friendly revenue stream for Severn Trent Water

Minworth STW - Sludge Screening Efficiency (2011)

S:Max installation to increase sludge screening efficiency

River Tame UPMs (2010)

Foxton Road & Sir Johns Road CSOs – working to deliver innovative solutions

Stoke Bardolph - Energy Crop AD Plant (2010)

Energy Crop Anaerobic Digestion Plant

Albrighton FWS Flood Alleviation (2009)

Complex flooding mechanisms including river flooding, highway drainage inadequacies and lack of hydraulic capacity in the public sewerage system

Frankley WTW (2009)

Quality water for Birmingham delivered through teamwork

Kenilworth Sewerage Strategy (2009)

Sewerage strategy to remove flooding from different sources

Minworth STW - Upgrade: Part 3 (2009)

£145 million upgrade – A Beacon Project for the Capital Delivery Programme

Pressure Management Design (2009)

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

Loughborough STW (2008)

Activated sludge plant conversion & capital maintenance

Minworth STW - Upgrade: Part 2 (2008)

Collaborative alliance drives value & programme

Scunthorpe (Ashby South Grange) UID (2008)

Two key CSO overflows that had UID’s within catchment

Strongford STW (2008)

Submerged aerated filter looking after the past, the present & the future

Derby STW Sludge Digestion (2007)

Extension to sludge digestion facilities

Hallam Fields STW Endocrine Investigation (2007)

Endocrine Disrupting Chemicals (EDC) scale pilot plants in Ilkeston, Derbyshire

Minworth STW - Upgrade: Part 1 (2007)

£100m upgrading scheme for Severn Trent’s largest STW

Stanton by Bridge Booster Pumping Station (2007)

Treated water and chlorination AMP4 improvements

Stoke on Tern WTW (2007)

Installation of new nitrate treatment plant

Wanlip STW (2007)

£58m investment by Severn Trent Water

Buxton STW (2006)

Demolition of decommissioned STW & land reinstatement

Coleshill & Roundhill Incinerator Upgrades (2006)

Upgrade to meet waste incineration directive

Evesham STW (2006)

Phosphorus removal and tertiary treatment plant

Llanwrin WTW (2006)

Replacement disinfection scheme

Milford & Bednall WTW (2006)

Iron and manganese removal scheme

Monkmoor STW (2006)

£11.7m scheme upgrades performance of STW for Shrewsbury

Stoke UIDs (2005)

‘No dig’ methods reduced impact on local community

Trent Vale Pumping Station (2005)

Part of UID AMP3 solutions in Stoke-on-Trent

Buxton STW (2004)

New £12.5m Membrane Bio-reactor to meet Fisheries consent

Hartshill WwTW (2004)

£6.5m project to renew, expand & meet new ammonia consent

Melbourne WTW (2004)

Rising mains renewal after several bursts

Packington STW (2004)

New oxidation ditches and inlet works

Sludge Dewatering Programme (2004)

Delivery of sludge dewatering plant projects – Severn Trent Water’s AMP3 Programme

Stoke UIDs (2004)

A collaborative approach to delivery

Worksop STW (2004)

Phosphorus removal & tertiary treatment plant

Worksop STW Sludge Dryer (2004)

£3 million ‘Centridry’ plant is first in the UK

Bamford WTW (2003)

Major asset renewal & quality improvements at key WTW

Bewdley Sewer Diversion - Phase 1A (2003)

Sewer diversion works for Phase 1 EA scheme

Church Wilne & Campion Hills WTW (2003)

Water quality improvements at major works

Derby STW (2003)

New works for old to serve PE of 500,000

Small STWs Programme (2003)

Delivery of small sewage treatment works projects

Whitacre High Life Pumping Station (2003)

Automation maintains city water reserves at precise levels

Cryptosporidium Barrier (2002)

Improving water quality at groundwater sources

Enhanced Water Treatment Project (2002)

Severn Trent develop arsenic removal technology for boreholes

Flow Measurement at Sewage Treatment Works (2002)

Ensuring accuracy to meet standards & requirements

Meriden to Highters Heath Main (2002)

27km link main Meriden to Highters Heath