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3.2 Ground conditions


3.2.1 Soils 3.2.1.1 Landfall


The predominant soil unit present along the coastline within the potential landfall area is the Swaffham Prior soil association (map code 511e). Details of this soil unit are provided in Table 1.


3.2.1.2 Preferred Onshore Cable Corridor


The Preferred Onshore Cable Corridor crosses a number of different soil associations. The major units encountered between the landfall and Tuddenham St Martin are Newport 2 (551e) and Newport 4 (551g) associations. There is also a significant area of Wallasea 1 marine alluvium (813f) on both banks of the River Deben and close to Martlesham Creek. Other soil associations present over smaller distances in the eastern half of the route are the Wick 3 association (541t), Burlingham 3 association (572p) and the Hanslope association (411d).


West of Tuddenham St Martin, the dominant soil association are the Melford and Ludford associations (map codes 571o and 571x respectively). Smaller areas of the following associations are crossed by the western end of the Preferred Onshore Cable Corridor: Burlingham 3 (572p), Beccles 1 (711r), Hanslope (411d), Midelney (813a) and Swaffham Prior (511e).


Further details of the soil associations present along the Preferred Onshore Cable Corridor are provided in Table 1.


3.2.1.3 Converter Station Refined Area of Search


The soil association present within the Converter Station Refined Area of Search is the Hanslope association (411d). Further details are provided in Table 1.


Table 1: Soil associations crossed by the Preferred Onshore Cable Corridor and at the Converter Station Refined Area of Search Code


Soil association


511e 551e Swaffham Prior Newport 2 Soil description


This is a well drained loamy soil, present over chalky rubble. It is at a slight risk of water erosion.


Deep well drained sandy soil with a risk of water and wind erosion.


551g Newport 4


Deep well drained sandy soil with a risk of wind erosion.


East Anglia Offshore Wind Limited


Preliminary Risk Assessment, East Anglia ONE Windfarm 41388-PRA(03)


Chalky drift or chalk


Glaciofluvial drift over Cretaceous sand or Red Crag deposits


Glaciofluvial drift


Parent material


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