Page 49 - Alderney Regional Environmental Assessment of Renewable Energy: Environmental Report

Alderney Regional Environmental Assessment of Renewable Energy:
Environmental Report
therefore, it is considered that the exposure to change during operation is negligible to low,
resulting in an insignificant to minor adverse impact.
4.1.2.2 Mitigation
The following mitigation works will need to be applied at the EIA project-level by the developer,
as appropriate, to minimise any potentially significant (i.e. moderate or major) physical process
impacts that have been identified in this REA:
ƒ Amendment of site design, including reduction in the number of tidal devices and/or
array location to minimise energy extraction at those locations where the tidal regime
controls key seabed features (e.g. sandbanks) or where protected features are present
(i.e. Alderney South Banks Subtidal Sandbank);
ƒ Optimisation of array design;
ƒ Development of a cable burial / protection plan;
ƒ Minimisation of cable, device and offshore substation footprints; and
ƒ Use of scour protection measures.
4.1.2.3 Residual impact
The mitigation measures identified in Section 4.1.2.2 could reduce the potential impacts of the
Draft Plan, thereby resulting in a lower level of residual impact. However, it is not possible with
any level of certainty to determine the exact level of residual impact as the extent of mitigation
achievable will be heavily dependent on project specific factors. Therefore, the significance of
potential residual impacts has been estimated and is summarised in Table 6.
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