important Cold War Bloodhound Missile Site near Bawdsey (WA114). Three possible bomb craters have also been identified from aerial photographs in this area (WA104) and further WWII remains are seen at Woodbridge (WA341, 356).
25.5.4 Geophysical Survey and Evaluation Results 79. A detailed magnetometer survey was carried out over an area of 24.4ha and encompassing the proposed convertor station locations for East Anglia ONE, East Anglia THREE and East Anglia FOUR. This successfully identified a number of anomalies of likely, probable and possible archaeological interest within the site (Figure 25.21). In particular this identified a partial ring ditch, most likely a round barrow or roundhouse, near the eastern edge of the survey area. The majority of the other responses appeared to relate to agricultural activity and most likely correspond to former field divisions, drainage ditches and ploughing trends.
80.
Archaeological trial trench evaluation was undertaken on the East Anglia ONE convertor station site in 2013 (ASE 2013). Here 27 30m long trenches were excavated and located two post-medieval ditches within three of the trenches that corresponded to field boundaries depicted on the 1838 tithe map and early 20th century OS maps.
81. Nineteen trenches were excavated across the East Anglia THREE convertor station site (Wessex Archaeology 2014). Within four of the trenches in the south-western part of the area was located a former field boundary. This boundary can been seen on the 1838 tithe map and forms the western edge of Bullen Green, it is still shown as extant on 1970s OS mapping but may represent re-use of an older post-medieval boundary. Located just to the east of this feature was located another boundary ditch, seen within two trenches. Within this feature was found a sherd of late medieval or early post-medieval pottery. This ditch seems to correspond with a boundary shown on the 1838 tithe map but absent by the 1882 OS first edition. The only other feature located during the evaluation was a modern, machine dug trench. This suggests that archaeological potential at the East Anglia THREE convertor station location is predominantly agricultural post-medieval and modern activity and of local interest only.
25.5.5 Assessment of Sensitivity - Potential Archaeological Remains 82. Due to the unknown nature of archaeological remains they have a high sensitivity as any intrusive groundworks have the potential to result in damage to or loss of features or deposits. This in turn may result in a total or partial loss of significance of these heritage assets within the footprint of any intrusive groundworks. However, the significance of any impact will depend on the value of asset.
Preliminary Environmental Information April 2014
East Anglia THREE Offshore Windfarm
Chapter 25 Onshore Archaeology Page 26
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