App D13.09 - Underwater noise baseline and modelling (Revision 1.0).

Abstract

Horizon Nuclear Power (Horizon) intends to submit a separate Development Consent Order (DCO) and Marine Licence application for a new Nuclear Power Station on land adjacent to the Existing Power Station. The proposed development site is located on the Wylfa peninsula, extending into the Irish Sea between the bays of Cemlyn and Cemaes, on the northern tip of the Isle of Anglesey off the north Wales coast. An Environmental Statement is being prepared to accompany the application. Subacoustech Environmental (Subacoustech) has undertaken underwater noise modelling in order to assess the possible noise impacts to marine fauna resulting from the various activities planned during construction at the Wylfa Newydd Power Station. Marine construction activities include rock breaking and dredging to enable vessels to reach the site as well as piling and drilling in order to construct cofferdams and construction of breakwaters. The results of the modelling have been presented in terms of biologically significant metrics and criteria.