25.3 Scope
25.3.1 Study Area 9.
The recorded historic environment resource within a 500m Study Area around the Development Area was considered in order to provide the context for the discussion and interpretation of the known and potential resource. Additionally, a Zone of Theoretical Visibility (ZTV) was created within a 4km radius from the convertor station location (extended to 10km for all Registered Parks and Gardens), within which all designated cultural heritage assets were identified in order to assess the impact of the convertor station location in terms of setting.
10.
Cultural heritage assets can comprise both of extant monuments and buildings, both designated and un-designated, as well as buried archaeological remains and aspects of the historic landscape. These can be impacted both directly through physical disturbance and indirectly through impacts upon their setting. Results from Chapter 29 Seascape, Landscape and Visual Amenity have informed the assessment of setting impact.
25.3.2 EmbeddedMitigation 11.
The onshore cable route has been located to avoid designated heritage assets and known archaeologically sensitive areas. By undergrounding the onshore cable route any effects on setting during the long term operational stage of the proposed project are effectively negated.
12. Horizontal Directional Drilling (HDD) would be used at eight locations including river crossings; this will reduce potential impact in these areas.
13.
Geophysical survey (RSK 2013) has already been undertaken at the convertor station location site over an area of 24.4ha and incorporating the proposed convertor station locations for East Anglia ONE, THREE and FOUR. Following this archaeological evaluation was undertaken at the convertor station location for East Anglia ONE (ASE 2013) and further evaluation has now been carried out at the East Anglia THREE convertor station location (Figure 25.21) (Wessex Archaeology 2014). The results of these surveys are more fully discussed in section 25.5.4 below.
14.
Viewpoints within the Landscape and Visual Impact Assessment have incorporated views from cultural heritage locations to determine any impacts on their setting, as agreed with the relevant local authorities. (See Chapter 29 Seascape, Landscape and Visual Amenity)
Preliminary Environmental Information April 2014
East Anglia THREE Offshore Windfarm
Chapter 25 Onshore Archaeology Page 5
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