172. Information provided by chance discoveries may contribute to a greater understanding of the offshore archaeological resource and is further regarded as beneficial in this respect, assuming that studies are completed to professional archaeological standards and the results produced made publically available.
17.6.1.3 Impact 3: Changes to the historic seascape character 173. A change will occur during construction as a result of activities associated with the installation of the windfarm and associated infrastructure. This change, however, will be temporary and transitory and the activities will cease once the construction phase is complete.
17.6.2 Potential Impacts during Operation 174. As a result of embedded mitigation, direct impacts to known archaeological receptors would not occur. Unavoidable direct impacts to potential archaeological receptors may occur at any point at which maintenance activities disturb the sea floor.
175. Increased deterioration of, or protection to, known and potential receptors may occur as a result of changes to the hydrodynamic and sedimentary regimes associated with the presence of the windfarm components and associated infrastructure.
176. The presence of the windfarm may also change the character of the historic seascape.
17.6.2.1 Direct Impacts 177. Activities undertaken within the East Anglia THREE site as part of maintenance works have the potential to directly impact potential archaeological receptors on or under the sea bed resulting in their loss or to disturb relationships between receptors and their wider surrounding.
178. Impacts resulting in these potential effects during operational phase include:
Anchors of vessels deployed during periodic overhauls and scheduled and unscheduled maintenance; and
Use of jack-up crane vessels in the event of turbine component, cable or foundation replacement or repair.
179. The magnitude of effects of unavoidable direct impacts to potential archaeological receptors would be high.
Preliminary Environmental Information May 2014
East Anglia THREE Offshore Windfarm
Chapter 17 Offshore Archaeology Page 89
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