Jackson Civil Engineering has completed work for the Environment Agency to construct over four kilometres of flood defences through the East Sussex port town of Newhaven.
The defences, which run along both banks of the River Ouse, include reinforced concrete walls, metal sheet piling sections, earth embankments and temporary stop log gates. The scheme is designed to provide one-in-200 year protection to hundreds of homes and businesses, and reduce the risk of flooding to local infrastructure such as the road network and railway line.
Jackson started work on the scheme in September 2016 and completed the works in July 2021.
Jackson Contracts Manager on the scheme, Andy Nailor said: “It’s been an interesting scheme with some technical challenges and close working with our partners and the local community. It is satisfying to see it completed and to know that residents and businesses in Newhaven are much better protected against tidal surges.”
As much of the construction work took place in the centre of Newhaven, Jackson worked hard to reduce the impact on local people. This included carrying out any noisy work within certain time slots, ordering deliveries outside peak hours and keeping the public informed of the work that was to come.
As well as the construction work, the Jackson team worked with local authorities to clear 2,800 tonnes of hazardous waste from a riverside commercial unit, while some of the work near the port had to be adapted to fit in with ferry operations.
The final part of the scheme was the enabling work to allow the installation of a temporary flood barrier across the railway in Newhaven. The work involved close collaboration with Network Rail and the Environment Agency, and had to be timed to fit in with planned railway closures. The work involved the construction of a specially designed cast concrete beam under the tracks and the installation of track drainage, and communications and power cables in sealed ducts – all designed to stop floodwater flows under the line.