Great Yarmouth Outer Harbour deepening

Beyond traditional venues such as its narrow streets and the sandy beaches of the ‘Golden Mile’ seafront, new activities at Great Yarmouth have developed of late – focusing on offshore energy. Located in the southern North Sea on the Norfolk coast, Great Yarmouth is the closest port to the massive East Anglia Array Round 3 wind farm, and provides easy access to the Hornsea wind farm.

In particular, the outer harbour is designed to service a wide range of vessels up to 250 m long. While the old Great Yarmouth herring port on England’s east coast has a secular tradition, the outer harbour has just been built in 2007. Allowing for a maximum draught of 10 m, it is one of the UK’s newest deepwater harbours. The challenge then is to keep the port and the entrances to depth, and to adapt for ever bigger offshore support vessels.

Our solution

In 2010, two deepening dredging campaigns were performed at Great Yarmouth Outer Harbour. The job was executed by the UK branch of Dredging International, which assigned two trailing suction hopper dredgers to East Anglia: ‘Vlaanderen I’ and ‘Marieke.’

The scope of work included deepening of the harbour basin, the berth pockets and the harbour entrance. In addition breakwater structures were replenished and survey works were carried out. Dredged material consisted of silt and sands, and was disposed for replenishment at the toeline of the outer breakwaters. Operating the dredging vessels required particular caution and skill when dredging in between the revetment heads in the harbour entrance.

 

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