Construction at these sites was expected to take between ​2 1⁄2 and ​3 1⁄2 years and once complete each site would be landscaped. The first TBM arrived in November 2017 and is called Rachel after engineer Rachel Parsons, who started the UK’s first women-only engineering company. Tideway is building the Thames Tideway Tunnel – London's new super sewer. [59][60][61] The decision gave rise to at least three Judicial Reviews.[62][63]. To protect the delivery of Thames Water’s everyday water and wastewater services, the tunnel will be financed and built by a separate company (the ‘Infrastructure Provider’). The tunnel is being built by 3 different consortia. The budget for the scheme steadily increased since it was first estimated. BTL is a consortium of investors that comprises Allianz, Amber Infrastructure, Dalmore Capital and DIF. Within these limits, it is up to Thames Water to decide how it works out customers’ bills – subject to its other licence conditions . Home > Residential > Supply and standards > Thames Tideway. The Thames Tideway Tunnel will transport overflow sewage to a pumping station located at Abbey Mills (East London) before final treatment in Beckton Sewage Treatment Works. When the tunnel is finished, the system should only overflow in severe weather conditions such as 3 days of solid rain. However, alongside the tunnel, sustainable drainage systems will also play their part. Jet Grouting was proposed for two reasons: The Thames Tideway Tunnel will be a 25 km (16 mi) tunnel running mostly under the tidal section of the River Thames through central London to capture, store and convey almost all the raw sewage and rainwater that currently overflows into the river. Abbey Mills Route – this route was different from the River Thames and Rotherhithe routes in that it would connect the Thames Tunnel to the head of the Stratford to East Ham part at the Abbey Mills Pumping Station. The result is that millions of tonnes of sewage pour into the river Thames every year. Our people are our greatest strength. [72][83], Much like the contemporaneous Crossrail and High Speed 2 projects, the development gave archaeologists the chance to uncover the hidden secrets of London's past. The Thames Tideway Tunnel is part of a 3-stage project to cut river pollution and clean up the Thames. As a result, millions of tonnes of raw sewage spills, untreated, into the River Thames each year. In both cases, the primary means of ground stabilisation was dewatering. The tunnel will be built under three separate construction contracts, each covering a distinct physical section of the network. Some people maintained that a sustainable urban drainage solution (SUDS) or green infrastructure would remove the need for the tunnel. Reconnecting London with the River Thames London relies on a 150-year-old sewer system built for a population less than half its current size. Stage 1 upgraded the main sewage treatment works in London – plants including Mogden, Crossness and Beckton can now treat more sewage every year. Our latest press releases and information bulletins. "[64], Less than a year later, in November 2011, a further £500 million was added to the estimate.[65]. The online 55m deep, 22m diameter sprayed concrete lined (SCL) drop shaft for a Tunnel Boring Machine (TBM) being built in the River Thames needed to be watertight. [68] On 29 July, Thames Water announced that a contract notice for work on the tunnel had been published in the Official Journal of the European Union (OJEU). [54] On 27 March 2013, it was confirmed that the application was valid and that Thames Water's consultation for the project had been adequate. Construction activities are expected to complete in 2024. Although the system still works well it’s struggling to cope in terms of capacity. [78] In the report that concluded its inspection of these documents, the Planning Inspectorate found that Thames Water had "underestimated of impacts on those that have been identified as having a significant effect and underestimated the number of receptors experiencing a significant effect" (12.97) and concluded "We do not consider that [Thames Water's] proposals meet the first aim of the NPS test to avoid significant adverse impacts on health and quality of life from noise" (12.357).[60]. selection of seventeen out of 71 CSO sites from the final shortlist. High levels of sewage also affects wildlife. The tunnel will be built under three separate construction contracts, each covering a distinct physical section of the network. Three tunnel routes were considered initially: A long list of 373 potential sites was created using a desktop survey of the land on either side of the 34 most polluting CSOs (as identified in the Thames Tideway Strategic Report). The final part was the deep storage and conveyance Thames Tideway Tunnel, which should intercept the outflows from London's most polluting CSOs and direct them to sewage treatment works for processing before they could enter the river. [76], Some people who live alongside proposed sites were concerned about the noise, disruption and potential loss of public space resulting from construction. It will provide capture, storage and conveyance of almost all the combined raw sewage and rainwater discharges that currently overflow into the river. It said the money raised was used for essential maintenance and upgrade works, although some have asked questions about how Thames Water paid so little corporation tax at the same time as distributing dividends to its shareholders. The need for the project and whether a tunnel was the most appropriate solution, The preferred tunnel route (including the detailed alignment of the tunnel), Preferred sites and permanent works (taking into account the feedback received from the first phase of consultation such as the move from greenfield to brownfield sites), Detailed proposals for the preferred sites (again taking into account feedback from the phase one consultation), The effects the project would have (as outlined in the preliminary environmental information report), Carnwath Road riverside – main tunnel drive and reception and connection tunnel reception site, Chambers Wharf – main tunnel drive and reception site, Earl pumping station – CSO interception site, Bekesbourne Street – system modification site, 2015: Main works and financing contracts awarded, 2016: Primary work completed; Main works preliminary construction begins. [69], The successful contractors for the three main tunnelling contracts were announced in February 2015:[70][71], In August 2015, the independent investors to finance and deliver the scheme were confirmed. Here you can see your options at any age. [9] An estimated total of some 39,000,000 m3 (3.9×1010 l), or 39 million tonnes, of storm sewage entered the river in a typical year. Following successful trials on a previous shaft, Keller formed 2.6m diameter interlocking columns at 52m depth, using specialist in-house jet grouting equipment, working 24/7 for 15 weeks to accelerate the programme. Thames Water sought feedback on the proposed tunnel routes and potential locations of construction sites.[23]. To address this Thames Water put together a Code of Construction Practice (CoCP) which outlined both site-specific and project-wide requirements and measures that it said would minimise the impacts of the construction and ensure that best practice standards and requirements were implemented across all sites and contracts. Stage 2 built the Lee Tunnel. In the words of the Consumer Council for Water in 2011: "The estimated cost of the project has escalated, from £1.7bn in 2004 (including Stratford to East Ham part and sewage treatment civil engineering construction movements (STW) costs) to £2.2bn in 2007 (also including Lee Tunnel and STW costs) to £3.6bn now for the shorter Thames Tunnel as far as Abbey Mills, plus some £1bn for the Lee Tunnel and upgrade of works at Beckton.

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