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Boston Barrier Tidal Flood Alleviation Scheme gets Tidal Flood Gate

Infra News - Published on Tue, 03 Dec 2019

Image Source: Boston Barrier Tidal Flood Alleviation Scheme
A 300 tonne tidal flood gate has arrived in Lincolnshire, and is being installed as part of the Boston Barrier Tidal Flood Alleviation Scheme. The Boston Barrier gate has been shipped by barge from the Netherlands, and contractors, BMM JV, a joint venture made up of BAM Nuttall and Mott McDonald, have driven the 29 m wide steel structure into place. Moving the barrier gate into position is a highly technical process. Steel sheet piles in the construction area were cut down in preparation for the barrier gate to be driven off the barge and over a temporary installation bridge by remotely controlled vehicles. The whole process, from delivery to completed installation took three days.

Now the barrier is in place it will be connected to the hydraulic rams and control systems before undergoing essential safety and commissioning tests. The current navigation channel at the side of the construction works will then need to be closed for the barrier to be effective. The barrier commissioning will commence immediate and infill of the bypass channel is to commence in the New Year, and it is anticipated that the barrier will be ready for full operation by summer 2020.

Once the barrier is fully operational, Boston town centre would be protected against a tidal surge similar to what was experienced in December 2013, when almost 800 properties and business flooded across 55 streets. The final stages of the scheme include installing a more flood resilient gate at the Port of Boston wet-dock entrance, and associated works to tie the project into the Haven Banks Scheme, a separate project that will raise and strengthen the existing flood banks running from the barrier towards the Wash for a distance of 5 km.

When complete, the GBP 100 million Boston scheme will reduce the risk of tidal flooding to more than 14,000 properties in the town. It will give Boston one of the best standards of defence against tidal flooding outside of London.

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Posted By : Yogender Pancholi on Tue, 03 Dec 2019
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