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Magnetic Anomaly Mound Total


41.


217 2


412


The gazetteers for all 412 features are included in Appendix 17.3. Locations of all features and example images of a variety of feature types are shown in Figures 17.2 and 17.30.


1.2.3 Wreck 71016 42.


71016 is a very well preserved medium sized wreck located in the north western section of the East Anglia THREE site (Figure 17.19). This wreck was also identified in the ZEA. The wreck has easily visible and distinguishable hull and deck superstructure discernible in the sidescan sonar data. These appear as linear and rectangular dark reflector anomalies with shadows. The wreck appears to be well preserved and intact lying upright on the seabed and orientated east to west. The dimensions of the vessel are 23.3m x 8.5m x 4.5m height. The southern edge of the hull is partially buried by the highly mobile sediments. The wreck itself and resultant sand banks have created a large and bright shadow in the sidescan sonar imagery.


43.


There is a large amount of scouring associated with this wreck particularly to the north of the remains with a scour mark measuring over 100m recorded. The southern area of the wreck has a build-up of sediment and sand waves. These mobile sands could potentially be covering a large amount of associated wreck debris and cargo. The wreck is clearly visible in the multibeam bathymetry data. This vessel has a large magnetic dipole anomaly associated with it measuring 96nT which suggests that it is likely of metal construction or contains ferrous cargo.


44.


The wreck is recorded in the UKHO database as an unknown wreck, first detected in 1995 (SeaZone 11266). The wreck is associated was a small magnetic deflection and survey data indicates that the wreck is intact and upright with site dimensions of 20m x 5m x 3.1m and a scour depth of 1.2m, comparable to the latest dataset. This wreck is recorded as a Live wreck.


1.2.4 Wreck 76056 45.


76056 is an unrecorded possible wreck remains identified in the north western section of the East Anglia THREE site in both the sidescan sonar and multibeam bathymetry datasets (Figure 17.20). The anomaly is visible as a set of linear hard edged dark reflectors with shadows, arranged in a ‘cross’ like formation. The anomaly has dimensions of 17.5m x 12.8m x 0.8m. There are smaller hard edged debris pieces within and around the main structural elements. The anomaly is


Preliminary Environmental Information May 2014 East Anglia THREE Offshore Windfarm Appendix 17.2 Archaeological Review of


Geophysical and Geotechnical Data: Technical Report


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