limited potential for location of access ramp, it is considered that the cumulative impact under this option would bemoderate adverse.


114. If the long HDD option is used for the first project, there will be no requirement for any of the projects to access the beach from the cliff, and therefore there will be no impact.


19.7.1.1.2Onshore cable route and converter station 115. No statutory or non-statutory sites are crossed by the onshore cable route or converter station. The impacts under Scenario 2 are considered negligible (see section 19.6.1.1.) which would be equivalent to the first project being constructed. Subsequent projects would also have impacts of negligible significance although the magnitude of those impacts would be lower. Overall the cumulative impact is considered to be negligible. Due to the absence of any designated sites within the onshore cable route and converter station there is no pathway for cumulative impacts with any other development.


19.7.1.2 Cumulative Impact 2: Impacts on soils 116. No soils of significant environmental value were identified at the landfall, onshore cable route and converter station (see section 19.6.1.2). Under Scenario 2, the impacts of open trenching and installing ducts are considered to be minor adverse. Subsequent cable installation operations for future projects would also have minor adverse impacts, although of a lower magnitude. Overall it is considered that cumulative impacts would be minor adverse.


19.7.1.3 Cumulative Impact 3: Impact on Ground Condition and Human Health 117. The first project to be constructed will undertake the majority of the excavations required for future projects. It is intended that where the onshore cable route crosses potentially contaminated sites such as historic landfills any jointing pits required for future projects would be located away from any such sensitive area. Therefore any impact would largely be caused by the first project and would only relate to the period of the first project’s construction. In section 19.6.1.3 the impact of the first project is considered to be minor adverse, given that subsequent projects would not need to undertake major excavations and jointing pits would be located sensitively as described above, their impacts would be negligible. The overall cumulative impact therefore is not considered to be above minor adverse.


Preliminary Environmental Information May 2014


East Anglia THREE Offshore Windfarm


Chapter 19 Soils, Geology and Ground Condition Page 47


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