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Jetty Non Technical Summary - EDF Hinkley Point

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Residual Impacts<br />

7.7.18 No significant residual impacts are predicted to occur.<br />

7.8 Navigation<br />

Existing Environment<br />

7.8.1 The Severn Estuary is an important shipping route, with commercial vessels navigating<br />

through the deep water approaches to several ports and harbours. Apart from the Port of<br />

Bridgwater, these ports are situated distant away from <strong>Hinkley</strong> <strong>Point</strong>, either on the south<br />

coast of Wales or at and upstream of Bristol. Databases of commercial shipping<br />

movements indicate that shipping in Bridgwater Bay is very low. As shown by two<br />

months of data from 2009, most commercial shipping movements occur on the opposite<br />

side of the Bristol Channel (see Figure 14; Note: this figure shows the proposed<br />

alignments of the cooling water structures associated with <strong>Hinkley</strong> <strong>Point</strong> C - intake in blue<br />

and outfalls in red).<br />

7.8.2 The Port of Bridgwater’s limits cover approximately 25 square nautical miles and include<br />

Combwich Wharf and Dunball Wharf on the River Parrett, but do not extend west as far<br />

as the proposed jetty development. Bridgwater Harbour Authority (part of Sedgemoor<br />

District Council) is responsible for navigation and mooring, safety, rights of access,<br />

pilotage, maintenance of channels and navigation aids oil spill contingency and port<br />

waste management. Port operations, oil spill contingency and port waste management<br />

plans are in place. Commercial vessel movements at the Port of Bridgwater totalled 41<br />

in 2007 and 37 in 2008. Most vessels were carrying aggregates and general cargo.<br />

Recreational moorings within the port limits are located mainly in the River Brue Estuary<br />

and Combwich Pill, although recreational activity tends to be focused around Burnhamon-Sea.<br />

7.8.3 As indicated on Figure 14, vessels inbound for the River Parrett and the Port of<br />

Bridgwater pass to the west and south of the Bell Gore Buoy, having due regard for the<br />

Cobblers Patch Shoal of -1.8m CD, which is located 2.5 cables south-south-west of Bell<br />

Gore. This route means vessels would pass directly north of the proposed jetty<br />

development’s location at <strong>Hinkley</strong> <strong>Point</strong>.<br />

7.8.4 The Bridgwater Bay Danger Area (D119) establishes the air space allocated for military<br />

activities and covers a circular area over land in West Somerset and sea in Bridgwater<br />

Bay. Its extent over the sea is marked on Admiralty Charts (as “Firing Practice Area<br />

D119”) and covers a partial circular area offshore that could be defined by an arc<br />

extending from <strong>Hinkley</strong> <strong>Point</strong> to beyond the 10m bathymetric contour towards Culver<br />

Sands and returning to land at Watchet. The Danger Area is a delineation of the air<br />

space above the water and does not place any restrictions on navigation and vessels<br />

have the right to transit it at any time.<br />

7.8.5 The Lilstock Range Firing Area is smaller than and is situated within D119 but only<br />

extends over the sea in Bridgwater Bay. Similar to D119, the firing area covers a partial<br />

circular area offshore that could be defined by an arc extending from east of <strong>Hinkley</strong><br />

<strong>Point</strong> and returning to land to the west of Watchet. The firing area delineates the water<br />

surface template for air to surface gunnery activities and is marked by buoys. The firing<br />

area is used primarily for military helicopter gunnery training and is operated under a<br />

clear range procedure so that exercises and training only take place when the area is<br />

clear of vessels.<br />

<strong>Hinkley</strong> <strong>Point</strong> C Preliminary Works<br />

<strong>Non</strong> <strong>Technical</strong> <strong>Summary</strong><br />

Temporary <strong>Jetty</strong> Development 41 November 2010

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