 Military practice and exercise areas; and 


Disturbance of unexploded ordnance. 60.


Site design has reduced the impact on a number of these activities. Where direct impacts are unavoidable, these would be mitigated through necessary co-operation and agreements. For instance, EATL will be required to have crossing agreements with operators of other cables and pipelines to ensure that these crossing are made safely and without damage to other infrastructure. It is therefore predicted that there will be negligible impacts upon other users.


30.3 Onshore 61.


The PEIR covers a wide range of onshore physical, ecological and human environmental receptors for which potential impacts have been assessed. These assessments have taken account of the two potential scenarios for the construction phase of the proposed East Anglia THREE project:


 


62. Scenario 1: use of pre-installed ducts; or


Scenario 2: open-trenching for cables for the proposed East Anglia THREE project and installation of ducts for the proposed East Anglia FOUR project.


For each impact, the assessment utilises a worst case approach for each of the two scenarios described above. The impact assessment for Scenario 1 will be reviewed following PEI and the finalisation of access routes, and will be updated for the ES submission and DCO application.


63.


The summaries below cover the worst case impacts which occur in all cases under Scenario 2. Under Scenario 1, impacts would be similar but the magnitudes reduced as the scale of works required for installing cables in pre-installed ducts are much lower.


64.


Given that the majority of impacts identified are temporary and localised within the area of the onshore electrical transmission works, the key cumulative impacts arise from the construction of the three proposed East Anglia Offshore Wind projects. No transboundary impacts are considered for the onshore assessments.


30.3.1 Chapter 19 Soils, Geology and Ground Condition 65.


The data and primary analysis makes use of the work undertaken by the proposed East Anglia ONE project. The assessment required consideration of the water and flood risk assessment.


Preliminary Environmental Information May 2014


East Anglia THREE Offshore Windfarm


Chapter 30 Summary and Conclusion Page 14


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