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Thames Water

Thames Water operates across London and the Thames Valley supplying water services to 9 million customers and wastewater services to 14 million.

On average, each day the company supplies 2.6 billion litres of drinking water, and removes and treats more than 4 billion litres of sewage. The company operates and maintains 100 water treatment works, 30 raw water reservoirs, 288 pumping station, 235 underground service reservoirs and 32,000 kilometres of mains. For its wastewater services, assets include 350 sewage treatment works (including Beckton, the largest in Europe), 108,000 km of sewer, 2,530 pumping stations and 1.2 million manholes. The company generates 176 GWh of renewable electricity, making it the largest generator of ‘green power’ within the M25.

Tideway West - Barn Elms CSO Connection Tunnel (2023)

The Thames Tideway Tunnel Project is a 25 km (16 mi) combined sewer under construction under the tidal section of the River Thames as it runs through London. It will significantly increase the capacity of London’s sewerage system (large sections of which were built in the 19th century), and be able to capture, store and […]

Beckton STW (2023)

Beckton Sewage Treatment Works (STW) is the United Kingdom’s largest STW serving a population equivalent of over four million. The AMP7 project is a major £185m investment to increase the site’s treatment capacity for growth, by a population equivalent of 200,000, by extending the existing activated sludge plant (ASP). Beckton STW will receive stormwater from […]

Chilton Foliat STW Flow Compliance (2023)

Located south of the village of Chilton Foliat and north-west of the town of Hungerford there is an existing sewage treatment works (STW) that serves a population of approximately 400 people. The works discharge into the River Kennet, one of England’s most important chalk streams which is home to an extensive range of rare plants […]

Deephams STW - Biomethane Project (2023)

Deephams Sewage Treatment Works (STW) is located in Edmonton, North London. In November 2018, Thames Water Utilities Limited (TWUL) issued take-over to the AECOM, Murphy, and Kier (AMK) joint venture for the replacement of the entire sewage treatment stream. The project increased the treatment capacity to 989,000 population equivalent and met the new final effluent […]

Faringdon to Blunsdon Trunk Main Phase 2 (2023)

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 […]

Guildford STW (2023)

Guildford Borough Council (GBC) are progressing with the development of approximately 41 hectares of brownfield land located along the west bank of the River Wey as it runs through central Guildford and north through Slyfield Industrial Estate. Guildford Sewage Treatment Works (STW) lies within this land and requires relocation in order to enable the development […]

King George V Reservoir (2023)

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 […]

Ufton Nervet WTW (2023)

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 […]

Bicester STW (2022)

In recent years the Oxfordshire town of Bicester had undergone significant growth in its population with a further potential growth of 37% in the near future. In late 2019, Thames Water implemented the need for a growth scheme to upgrade various elements of the works to accommodate the forecast population increase. Bicester STW is a […]

Maiden Lane Reservoir (2022)

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 […]

Queen Elizabeth II Reservoir (2022)

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 […]

Tideway East - Earl Pumping Station (2022)

A complex ground improvement scheme has been designed and installed at Earl Pumping Station (EARPS), one of Tideway East’s sites, to enable the excavation and permanent works for the combined sewage overflow (CSO) chamber to be carried out. Challenges such as local contamination, site congestion, costs and time scale had to be overcome by delivering […]

Evenlode Phosphorus Trial (2021)

The Evenlode is a headwater of the River Thames. The catchment covers an area of around 30,000 ha, flowing from Moreton-in-Marsh to Eynsham over a distance of more than 75km. It consists of 16 Water Framework Directive (WFD) waterbodies, many of which are failing their targets for phosphate alongside other chemical, hydromorphological and ecological elements. […]

Holloway Storm Relief Sewer (2021)

In the 1850s, London’s population was approximately two million. In 1858, predicting population growth, Sir Joseph Bazalgette constructed a combined sewerage system collecting both wastewater from homes and businesses, and rainwater run-off, to serve a population equivalent of four million. Now, with London’s population approaching nine million, the sewerage network can become overloaded during severe […]

Tideway Central - Albert Embankment Foreshore (2021)

The Thames Tideway Tunnel project will upgrade London’s Victorian sewer system, which was developed by Sir Joseph Bazalgette in the mid-1800s for a population of 4 million people. Now with over 8 million Londoners, the system capacity, around 6mm per hour rainfall in the catchment, has been exceeded and the discharges of mixed water through […]

Tideway Central - Blackfriars Bridge Foreshore (2021)

The Tideway project is a new £3.8 billion, 25km long combined sewage storage and transfer system currently under construction in London. The project is divided into three design and build contracts: West, Central and East. The scope of works of the Central Section, the largest contract, includes 12.7km of 7.2m internal diameter tunnel and eight […]

Tideway Central - Falconbrook PS CSO Shaft (2021)

The Tideway project is a new £3.8 billion, 25km long combined sewage storage and transfer system currently under construction in London. The project is divided into three design and build contracts: West, Central and East. The scope of works of the Central Section, the largest portion of the project at over half its length, includes […]

Tideway Central - Junctions (2021)

The Tideway Tunnel is a new 25km long combined sewage storage and transfer system that will help protect the ecology of the River Thames by tackling the problem of overflows from London’s ageing sewers. The Central Section consists of eight work sites each incorporating a drop shaft, as well as two tunnel drives. Of the […]

Tideway Central - Main Tunnel Primary Lining (2021)

The Tideway Project is a 25km long combined sewage storage and transfer system along the River Thames in central London, UK. The project is split into three design and build contracts with the limits of each contract determined primarily by geology along the alignment. The contract for the Central Section, the longest and most challenging […]

Tideway Central - Main Tunnel Secondary Lining (2021)

In the heart of London, the largest project in the UK water industry is underway. Tideway is a new combined storage transfer system, commissioned to provide London’s sewage network with additional capacity and prevent pollution of the River Thames. The colossal scheme consists of a 25km TBM bored tunnel with numerous shafts, associated outfalls and […]

Tideway Central - Vortex Pipes (2021)

The Thames Tideway Tunnel is a major infrastructure project that will intercept the existing London sewerage system, through a 25km-long tunnel and connection tunnels from Acton in West London to Abbey Mills in East London. The tunnel has a finished internal diameter of 7.3m, starting at a depth of 30m below ground until reaching a […]

Tideway Central - Watertightness Testing (2021)

The Thames Tideway Project is a major infrastructure project that will intercept the existing London sewerage system through a series of tunnels running 25km from Acton in West London to Abbey Mills in East London. There are 22 vortex drop pipe structures and other near surface structures that will intercept existing spills into the Thames; […]

Tideway East - TBM Delivery (2021)

The Thames Tideway Tunnel is a new storage and conveyance tunnel running through the centre of London, mostly under the River Thames. The main tunnel, which is approximately 25km long with an internal diameter of 7.2m, will run from Acton in the west through to Abbey Mills in the east. The project has been split […]

Barrow Hill Shaft (2020)

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 […]

Battersea Shaft Pumping Station (2020)

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 […]

Brentwood STW (2020)

Brentwood Sewage Treatment Works (STW) is one of Thames Water’s medium sized treatment works. The site is located to the north-east of London between Harold Wood and Brentwood in Essex. The STW treats foul water from the catchment serving West Brentwood, Warley and Pilgrims Hatch. It currently serves a population of 36,500 which will increase […]

Childrey Warren WTW Abstraction Closure (2020)

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, […]

Counters Creek Flood Alleviation Scheme (2020)

The Counters Creek Flood Alleviation Scheme was developed by Thames Water in response to the widespread basement flooding caused by intense rainfall in the Royal Borough of Kensington and Chelsea and the London Borough of Hammersmith and Fulham. The scheme aims to reduce flood risk for relevant basement properties through a series of interventions that […]

Tideway Central - Albert Embankment Foreshore (2020)

The Thames Tideway Tunnel is a major tunnelling project designed to mitigate the large-scale pollution problem involving the discharge of sewage into the River Thames. The project consists of a 25km long TBM tunnel under the river along with numerous shafts, culverts and connections tunnels constructed using sprayed concrete lined techniques. These will be used […]

Tideway Central - Chelsea Embankment Foreshore (2020)

The Chelsea Embankment Foreshore (CHEEF) site is one of the eight main sites in the Central Section of the Thames Tideway Tunnel. The site is located within the Royal Borough of Kensington and Chelsea and will allow for the diversion to the main tunnel of approximately 280,000m3 of sewage that currently discharges into the river. […]

Tideway Central - Falconbrook Pumping Station (2020)

Falconbrook Pumping station (FALPS), located in the London Borough of Wandsworth, is the most westerly site on the Thames Tideway Central Section. FALPS is an active pumping station, discharging approximately 700,000m3 of untreated sewage directly into the River Thames each year via six storm pumps. The current station has a combined discharge volume rate of […]

Tideway Central - Marine Works (2020)

The Thames Tideway Tunnel is a new super sewer that will intercept, store and convey the CSO discharges to Beckton STW for treatment. The project is divided into three main work contracts: West, Central and East. The Ferrovial Construction and Laing O’Rourke joint venture (FLO JV) has been appointed as principal contractor for the Central […]

Childrey Warren WTW Abstraction Closure (2019)

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 […]

Tideway East - Hydraulic Modelling (2019)

The Thames Tideway Tunnel is a new storage and conveyance tunnel running through the centre of London, mostly under the River Thames. The main tunnel, which is approximately 25km long with a maximum internal diameter of 7.2m, will run from Acton in the west through to Abbey Mills in the east. The aim of the […]

Tideway West - Hammersmith PS (2019)

The Hammersmith Pumping Station is one of Thames Water’s key sewerage assets in West London. Its catchment covers an area of around 19 square miles, receiving flows from 47 combined sewer overflows (CSOs). The pumping station discharges 51 times in a typical year releasing 2,210,000m3 of untreated sewage and an estimated 557 tonnes of sewage […]

Thames Water AMP6 Pressure Management Programme (2019)

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 […]

Waterworks Bridge Reconstruction (2019)

Waterworks Bridge is an oblique three-span structure of approximately 30m length crossing the Waterworks River in Stratford, East London and forms a key part of the Greenway footpath and cycleway providing access to/from the Queen Elizabeth Olympic Park from the south-east. Most significantly, Waterworks Bride houses a section of the Northern Outfall Sewer (NOS). Built […]

Deephams STW - A630 Major Upgrade (2018)

Thames Water’s Deephams Sewage Treatment Works (STW) is located in Edmonton, North London and treats a 989,000 population. Three drainage catchment areas of Lea Valley, High Barnet and Tottenham flow to the works, the ninth largest plant in the UK. The original effluent treatment process was built between 1956-1966 and had been updated at various […]

Euston 42” Trunk Main Diversion (Phase 1) (2018)

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 […]

Highworth WwTW (2018)

Highworth Wastewater Treatment Works (WwTW) is located at Pentylands Lane, Highworth to the northeast of Swindon. The treatment works currently serves a population of approximately 10,000 customers, with an average daily flow of 1,720m3 per day and a peak flow of 55 l/s. The works is Royal HaskoningDHV’s first full-scale Nereda plant in the UK. […]

Island Barn Reservoir Remedial Works (2018)

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 […]

King’s Scholars’ Pond Sewer (2018)

There was evidence of significant internal degradation and deterioration of the King’s Scholars’ Pond Sewer in the vicinity of the Baker Street tube station London Underground tunnel. Degradation included significant cracking of the sewer brickwork as a consequence of considerable settlement of the LUL railway tunnel beneath. The sewer is situated beneath a key artery […]

Lockwood Reservoir (2018)

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 […]

New Malden Trunk Mains (2018)

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 […]

Nine Elms, Battersea Growth & SuDS (2018)

The Nine Elms redevelopment area within Battersea includes 21,000 new dwellings, office, leisure and retail space creating 8000 new jobs including the new US Embassy, a relocated New Covent Garden Market site and the Northern Line extension. An integrated water management study completed by Thames Water (TW) in partnership with the Greater London Authority, ARUP […]

Sheeplands WTW (2018)

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 […]

Tideway Central - Overview (2018)

Thames Tideway Tunnel is the largest water infrastructure project currently under construction in the UK and will modernise London’s major sewerage system, the backbone of which dates back to Victorian times. Although the sewers built in the mid-19th century are still in excellent structural condition, their hydraulic capacity was designed by Sir Joseph Bazalgette for […]

Thames Water UPM Scoping Studies (2018)

The Environment Agency (EA) identified a number of waterbodies which were deemed to be at risk of deterioration or failure to achieve the Water Framework Directive (WFD) ‘good’ status due to the impacts from wet weather discharges from the urban wastewater network. Seventeen of these waterbodies were within the Thames Water region and the risk […]

Axford & Ogbourne WTWs (2017)

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 […]

Basingstoke Sludge Treatment Centre (2017)

The Basingstoke Sludge Treatment Centre (STC) incorporates liquid and caked, raw sludge import facilities together with thermal hydrolysis and anaerobic digestion plant which will process 53tDS/day of sludge from Basingstoke, Farnham, Fleet, Guilford and Newbury. This will fulfil Thames Water’s strategy to cease unsustainable liming activities at the four satellite sites up to the 2036 […]

Beckton to Riverside Sludge Mains Refurbishment (2017)

Thames Water Utilities Limited (TWUL) currently transfer a proportion of the wastewater sludge generated by Beckton Sewage Treatment Works (STW) in East London to Riverside STW using 2 (No.) 8km buried pipelines. These twin pipelines were originally installed in the late 1960s to pump sludge in the opposite direction from Riverside to Beckton where it […]

Cowley Trunk Main Project (2017)

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 […]

Littlemore Sewage Pumping Station (2017)

As part of the Thames Water AMP5 programme of works, Optimise was instructed to carry out an upgrade to the terminal pump station feeding Oxford STW located in Littlemore, Oxford. The terminal pump station handles flow from a population of 200,000 and the condition of the station was of considerable concern to the Environment Agency, […]

Mogden STW (2017)

Mogden Sewage Treatment Works is the second largest in the UK. The first phase was built between 1931 and 1935 at a cost of £1.7 million and covers an area of 55 hectares. The facility treats wastewater from a population equivalent of 1.9 million across a 60 square mile catchment area of north and west […]

Tideway Central - Vessel Relocation (2017)

London’s sewerage system was designed by Sir Joseph Bazalgette in the 1850s, for a population of four million people. Whilst the Victorian sewers are still in excellent working condition, they are struggling to cope with the demands of the city’s growth. Every year, tens of millions of tonnes of raw sewage pour into the River […]

Walton Eel Screens (2017)

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 […]

Beckton STW (2016)

In May 2015 Thames Water Operations identified emergency works on Activated Sludge Plant (ASP) 2 at Beckton STW in east London. The work was necessary to address the asset health and resilience of the treatment works, meet performance commitments and ensure satisfactory sludge disposal. The project was a fast track design and implementation with early […]

Deephams STW - CFD Modelling (2016)

Deephams STW, which is located in East London, is the ninth largest works in the UK and serves a population equivalent of 891,000 (as of 2011) [1]. In order to cater for increasing population growth, meet new wastewater quality standards, be prepared for weather variations and to replace an ageing plant, a major upgrade has […]

Lee Tunnel - Flow Transfer System (2016)

Thames Water’s Lee Tunnel will create a cleaner, healthier River Thames by capturing combined sewer overflows at Abbey Mills Pumping Station, preventing 16 million tonnes of stormwater and sewage from being discharged into the River Lee each year. Up to 385,000m3 of stormwater and sewage will be stored in the 7km long tunnel and transferred […]

Tideway East - Challenges (2016)

London’s sewerage system was designed by Sir Joseph Bazalgette in the 1850s, for a population of four million people. While the Victorian sewers are still in excellent working condition, they are struggling to cope with the demands of the city’s growth. Every year, tens of millions of tonnes of raw sewage pour into the River […]

Turners Road Penstock Chambers Upgrade (2016)

As part of the Thames Water (TW) AMP5 programme of works, it was necessary to remove and upgrade condemned platforms within two interlinked penstock chambers on the Low Level No. 1 (LL1) and Low Level No. 2 (LL2) sewers, which are two of the largest and most important in London. The chambers sit beneath a […]

Architecture in the Water Industry (2015)

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

Chamberlayne Road FAS (2015)

Upgrading an ageing combined sewer network and increasing capacity to protect against basement and overland flooding

Deephams STW - Upgrade (2015)

Thames Water’s £250m flagship project in London is currently one of the largest water projects in the UK

Horton Kirby Aquifer Storage & Recovery (2015)

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

Lee Tunnel - Secondary Lining (2015)

Secondary lining mitigates water ingress providing a structurally competent, durable and smooth bore for the hydraulic performance of the tunnel

Lee Tunnel - Tideway Pumping Station (2015)

An 87m deep/38m diameter pumping shaft to transfer the volume of the Lee Tunnel to Beckton STW

Swindon Southern Trunk Sewer Phase 2 (2015)

New Thames Water 1,200mm diameter trunk sewer enables growth in South Swindon

Swindon STW - Inlet Works (2015)

Network and growth upgrade scheme

Swindon STW Network & Growth Upgrade Project (2015)

Innovative thinking and collaborative working to achieve cost beneficial solutions

Sycamore Road Storage Shaft FAS (2015)

1,100m3 of offline storage in Farnborough protects 25 properties from hydraulic foul sewer flooding for rainfall events of up to 1 in 30-year return periods

Thames Tideway Tunnel - Overview (2015)

One of Europe’s largest infrastructure projects, the 25km ‘super-sewer’ will tackle sewage discharges into the River Thames

Abbey Mills Pumping Station (2014)

Motor & switchgear replacement

Beckton & Crossness STWs (2014)

Upgrades complete; helping to make the Thames a cleaner, healthier river

Beckton & Crossness THPs (2014)

Advanced sludge digestion facility (ESDF) powers up at Beckton and Crossness

Crossness STW - Architectural Design (2014)

Architectural design of the main sludge processing and distribution building

Ellen's Green Sewage Pumping Station (2014)

Provide additional storage within Ellen’s Green catchment to compensate for large increases in flow during winters

Greenstreets at Counters Creek SuDS Retrofit Pilot Scheme (2014)

Using green & grey infrastructure to develop a programme to alleviate flood risk from combined sewers in West London

Harlow Network Upgrade (2014)

New wastewater pumping station and storage shaft allows for future growth east of Harlow

Kennington Road FAS (2014)

Together, the Oxford Area Flood Partnership, private companies and local authorities resolve Kennington flooding

Lee Tunnel - TBM Drive & Tunnel Lining (2014)

London’s deepest sewer – the main TBM drive and tunnel lining

Maida Vale FAS (2014)

Tangential vortex drop and passive control to eliminate foul pumping station, incorporated in major project to eliminate property flooding

Oxford STW - Sludge Stream Upgrade (2014)

Working with Thames Water to meet their sludge management targets and regulatory drivers

Speen WTW Transfer Mains (2014)

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

Swindon Networks Upgrade Project (2014)

Design of combined storm overflow using a physical scale model

Beckton STW (2013)

£190m upgrade of one of Europe’s largest STWs nears completion, helping to create a cleaner, healthier River Thames

Crossness STW (2013)

Part of Thames Water’s London Tideway Improvements programme to create a cleaner, healthier River Thames

Deephams STW - Innovations (2013)

Innovative design & construction techniques lead to significant safety improvements & cost savings

Deephams STW - Quality Upgrades (2013)

AMP5/6 Quality Upgrade Phase 1 – Engineering and design support

Knight & Bessborough Reservoirs - Inlet Mains (2013)

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

Lee Tunnel - TBM Launch (2013)

Complicated TBM launch to prevent 16m3 of storm water and sewage being discharged annually

London Strategic Model (2013)

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

London Victorian Mains Replacement (2013)

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

Mogden STW (2013)

Extension and refurbishment project for Thames Water as part of the London Tideway Improvements

Oxford STW - Thermal Hydrolysis Plant (2013)

Bio Thelys® thermal hydrolysis plant provides green energy from sewage sludge

Basingstoke & Bracknell STWs - NVZ Schemes (2012)

Optimising sustainability in wastewater treatment

Beckton STW - Odour Control (2012)

Primary sedimentation tank odour project

Beckton STW - Upgrade (2012)

Major upgrade to one of Europe’s largest sewage treatment works to create a cleaner, healthier River Thames

Botley Sewer Renewal (2012)

Back to basics approach – understand the problem

Camberley, Chertsey & Crawley STWs - NVZ Schemes (2012)

The Nitrogen Vulnerable Zone dewatering challenge

Crossness STW (2012)

Increasing treatment standards and capacity to create a cleaner, healthier River Thames

Deephams STW - Discfilters (2012)

Tertiary treatment plant utilising Hydrotech® Discfilter technology

Deephams STW - Phosphorus Removal (2012)

Phosphorous removal to a consent standard of 1mg/l under the Urban WwT Directive

Harlow Surface Water Flooding (2012)

Sustainable drainage – seizing the opportunity in Rye Meads, Harlow

Lee Tunnel - Shaft Construction (2012)

London’s largest & deepest shafts to eliminate sewage discharges to the River Lee

Long Reach STW (2012)

£40m works extension project for Thames Water as part of the London Tideway Improvements

Merstham STW (2012)

Works upgrade to comply with the AMP5 quality consent to the 2021 design horizon

Mogden STW - Pasteurisation Plant (2012)

Sludge pasteurisation plant to treat sewage sludge for safe use in agriculture

Riverside STW (2012)

Major upgrade to increase capacity and generate enough electrical power to run the entire works

Rowden Road Sewage Pumping Station (2012)

Refurbishment to extend the asset life of a critical pumping station

Cranleigh, Woking, Farnham & Earlswood STWs (2011)

Sludge and odour improvement schemes on four STWs and South London

Deephams STW - Improvements (2011)

£40m project to improve storm storage and treatment facilities and the water quality of River Lea

Generating Electricty from Biodiesel (2011)

The practicalities of biodiesel, a subset of liquid biofuels

Lee Tunnel - Introduction (2011)

For the last 150 years, London’s wastewater has been disposed of through an elaborate network of interceptor sewers built by Victorian engineer, Sir Joseph Bazelgette. This system was a single combined stormwater and sewer network, which incorporated over 50 (No.) Combined Sewer Overflows (CSOs) to the River Thames and the River Lee. These overflows were […]

Long Reach STW (2011)

£27m works extension project to increase treatment capacity and improve quality standards

Sudbourne Road (Brixton) FAS (2011)

Investment in Brixton to remove properties from the Sewer Flooding History Database

Thames Tideway Tunnel - Overview (2011)

Creating a cleaner, healthier River Thames – an overview

Hampton Advanced WTW (2010)

Advanced WTW – three steps to ensure resilience

Mogden STW (2010)

A £15m refurbishment project for Thames Water

Thames Gateway WTW (2010)

A 150,000 m3/day Reverse Osmosis Desalination Plant

Beacon Hill Reservoir (2009)

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

Farmoor WTW (2009)

Combined upgrades to meet SOSI compliance

Hornsey WTW (2009)

New River bromate removal scheme

Peregrine Close (Swindon) FAS (2009)

Part of the Thames Water’s £400m programme to significantly reduce the number of properties at risk from sewer flooding

West Ham FAS (2009)

£65m project improves environment for residents

Farmoor WTW (2008)

Fobney AWTW (2008)

Process upgrade to increase output

GATOX - Gatehampton to Oxford Transfer Pipeline (2008)

Gatehampton to Oxford – new pipeline to secure supply

Wraysbury Reservoir Inlet Tunnel Second Lining (2008)

In-situ structural secondary lining of existing tunnel

Tall Building Database (2007)

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

Chingford South WTW - Construction (2006)

Record race against time to secure London’s water supply

Chingford South WTW - Process (2006)

First new surface water treatment works in London for 13 years

Mogden to Perry Oak Sewer (2006)

Highly innovative solution for twin 12’’sludge mains replacement

New River Aqueduct (2006)

New lease of life for 400 year old water supply aqueduct

Slough STW (2006)

Discfilter tertiary treatment to meet tighter consent

Lane End WTW (2005)

Darent Alf, restoring flows in the River Darent

Perry Oaks - Iver South Sludge Processing Centre (2005)

Perry Oaks processing centre makes way for Terminal 5

Abbey Mills Pumping Station (2004)

Improved discharges from largest UK combined sewer P.S

Crossness STW (2004)

£23m Crossness STW upgrade fine screening & power supply integrity improvements

East London Resource Development (2004)

Providing 22.5 million litres of water a day to meet demand

High Wycombe STW (2004)

£42m scheme improves environment & eases housing shortage

Hoddesdon Transfer Scheme (2004)

Increasing water resources in the Lee Valley

Reading STW (2004)

£80m Thames ‘state of the art flagship’ commissions in 2004

Swinford WTW (2004)

New GAC plant, RGF refurbishment & upgraded protection

Bell Green Water Supply Project (2003)

New water source for 90,000 in SE London but 1.2km triple pipeline poses environmental challenge

Dorney WTW (2003)

Cryptosporidium removal plant for borehole water

Rye Meads STW - Upgrade (2003)

Refurbishment & upgrade to meet new consent

Holybourne Pumping Station (2002)

New pumping station, wet well, outfall and access road

Kempton WTW Steam Plant Project (2002)

Triple expansion pumping engines restored for public viewing

Plumbosolvency (2002)

Thames Water install plant to meet new regulations

Riverside STW (2002)

Phase 2 improvements – aeration

Royal Oak Pumping Station (2002)

Refurbishment & upgrade to cure capacity problems

Rye Meads STW - Lagoon Remediation (2002)

Engineering solution minimises environmental impact

Rye Meads STW - Storm Pumping Station (2002)

New storm pumping station to reduce flooding risk

Swinford WTW (2002)

Uprating north Oxfordshire plant to meet demand