Portsmouth City Council is looking for contractors to deliver a new coastal defence construction as part of the North Portsea Island Coastal Flood Defence Scheme.
The £58.8M programme, which is divided into four parts, will reduce the risk of coastal flooding and erosion to the area over the next 100 years.
The local authority is now seeking to appoint a contractor to deliver the £14M fourth phase of the programme adjacent to Kendall’s Wharf in the city and along the Eastern Road in the north, tying into the completed phase two of the programme.
The scope of the works includes the construction of a reinforced seawall, including sheet pile and bearing pile installation with local realignment. Part of this is required to be encasement and part new sea wall with a stepped revetment.
Kendall’s Wharf and Eastern Road have 2.4km frontage (300m for Kendall’s Wharf and 2.1km for Eastern Road) and sea defences will need to be raised to 4.8m.
The road raising and steel sheet piles of Kendall’s Wharf works will be raised to a lower level as set back from the coast.
The Kendall’s Wharf defences will tie in with existing embankment defences, with the first 150m of sea defence becoming a raised earth embankment with a 3m crest and continuation of the 2m wide coastal path.
South of the road will be a 150m steel sheet pile wall which will tie into the coastal defences at Eastern Road.
Work at Kendall’s Wharf is expected to start in September 2019 and be completed by April 2020. The Eastern Road seawall construction will start in April 2020 and be completed by October 2022, excluding landscaping works which must be completed by February 2023.
To be considered for the tender shortlist, interested parties should complete and return a supplier selection questionnaire and associated documents by 2pm on Friday 29 June 2018.
It is expected that invitations to tender will be issued on Monday 22 October 2018 with the contract awarded in late May 2019.