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Jackson completes UK's largest inland flood defence scheme

Jackson has successfully completed work on the £51m Nottingham Left Bank Flood Alleviation Scheme, which was officially opened in September by the new Environment Secretary Owen Paterson, and Lord Chris Smith, Chairman of the Environment Agency. This is the largest inland flood defence scheme ever constructed, and has reduced the risk of flooding to 16,000 homes and businesses along a 27Km stretch of the River Trent from Sawley to Colwick. Furthermore, the project was successfully delivered by the Jackson team three months early, and £6m under budget.

trenchmixProject Manager Steve Palmer said: "It feels good to know that this project has had an impact on so many peoples' lives and livelihoods, by ensuring the risk of flooding is no longer a major issue for Nottingham. The whole site team did a fantastic job for the Environment Agency, and delivering the scheme early, and significantly under budget is testament to all their hard work."

Jackson began construction in June 2009 along the left bank of the river. The route of the defence stretched across Nottingham travelling through the city centre, past the iconic War Memorial, alongside the railway line, and also through Attenborough Nature Reserve, a Site of Special Scientific Interest (SSSI). This wide variety of different working environments posed significant construction challenges, however innovation, and value engineering has been prevalent throughout the three year construction programme.

The most significant innovation on this project was the use of a Trenchmix machine. Used for the first time in the UK to construct a flood defence, Trench-mix is a new technique whereby the original ground is mixed with cementitious grout to form an impermeable barrier, in situ without the use of traditional deep excavation methods. This technique took only three weeks, opposed to five months that it would have taken to construct conventional steel sheet piles, saving the taxpayer £650,000 in the process.

Environment Secretary Owen Paterson said: "What's really exciting about this scheme is the impact it has had on the city of Nottingham. Not only has it protected 16,000 homes and businesses, but it has now also freed up 500 acres of land, previously blighted by flooding, that can be developed by the private sector, to create jobs and wealth for Nottingham. Congratulations to the Environment Agency and Jackson for delivering it under budget, and three months early."