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    Customer

    Portsmouth City Council

    Location

    Portsea, Hampshire

    Value

    £12.9m

    The Tipner Lake phase of works covered 1.85 km of coastline from the Mountbatten Centre to the Portsbridge roundabout and took three years to complete. The area’s environmental designations include SPA, RAMSAR, Important Bird Area, SSSI, Designated Shellfish Waters and Bass Nursery Area.

    A new, 4m high, reinforced concrete seawall comprising large areas of encasement and sheet pile installation has been built along the entire frontage of Tipner Lake to provide continuous defence and protection against a 1 in 500-year coastal flood event.

    A shared footpath and cycleway has been constructed directly behind the seawall, with additional works including new landscaping, planting and the creation of ‘social spots’ to provide places for people to stop, relax and enjoy the views. A shared use coastal path has been retained and a new network of paths has improved access.

    Another element of the works was the removal of the 250m Lower Wade Way slipway and causeway and the construction of a new, shorter slipway.

    An ornithological watching brief remained in place while we undertook non-piling and site preparation works over the 2017/18 winter period. This was agreed with Natural England to ensure that there is no significant disturbance to the waders and Brent Geese that feed on the intertidal area adjacent to the seawall.

    The third year of the scheme got underway in Spring 2019 with final works to the sea wall and revetment and all landscaping and planting being completed.

    As part of our community engagement activity on this project we worked with the adjacent Hilsea Lido to bring a bespoke mural by local artist ‘My Dog Sighs’ to life.

    our sectors

    Knights Brown performed very well on this project in terms of quality, cost and time. The team worked very well as part of an integrated delivery team with the Employer to the benefit of the project

    - Marc Bryan, Portsmouth City Council

    Sites are always very well presented. First impressions count and if a site looks well organised and clean when you arrive then generally this is applied throughout the management of the projects. Indeed, all five projects I am Cummins PM for, have been managed to a high standard and equally the safety records and standards are very good.

    - Iain Brooks, Cummins