06f21798-a9d2-4657-90c6-7b8aaba00dcd eng series DONG Energy Power (UK) Ltd Data Manager receplon@dongenergy.co.uk pointOfContact 2016-08-01 MEDIN Discovery metadata standard 2.3.7 urn:ogc:def:crs:EPSG::4326 2011, PLA Hydrographic Service, Gunfleet Sands 1 and 2, Export Cable and Wind Turbine Inspection Surveys (Summer 2011) 2012-08-31 publication 715 The Port of London Authority (PLA) Hydrographic Service was commissioned by DONG Energy to undertake repeat Multibeam Echosounder (MBES) and Side Scan Sonar (SSS) surveys at the Gunfleet Sands Offshore Windfarm in the Thames Estuary. The previous survey having been undertaken during March 2011 – PLA Reference 113-500-142 Contract Q15/10. The surveys are required for the FEPA Licence Numbers: Gunfleet Sands 1 31919/09/0 and Gunfleet Sands 2 33723/09/0. The scope of work was as undertaken in 2010 which included: 1. MBES and SSS survey of 100m wide corridor along Export Cable Route between the windfarm substation and landfall site, to the east of Clacton-on- Sea. 2. MBES survey the seabed of an area 2400m x 100m around and between six adjacent turbines, namely A6 to F6. 3. For 2011, a requirement for additional works and analysis identified by DONG Energy, namely:- Volume calculations at each of the six turbine sites, difference surface charts at each turbine site, difference surface along export line, and comments on wider area geomorphology and bathymetric changes. 4. For August 2011 the scour around the substation was assessed and compared against previous surveys. This series covers survey elements which were undertaken on the 30th and 31st August 2011 around turbines A6-F6, and along the Export Cable Route. The survey work was carried out using the PLA survey vessel ‘Yantlet’, with bathymetric data being collected using a hull-mounted Reson SeaBat 8125h MBES and SSS extracted from the bathymetric data in the form of snippets and backscatter. DONG Energy Power (UK) Ltd Data Manager receplon@dongenergy.co.uk custodian Port of London Authority Hydrographic Service +44 (0) 1474 562206 +44 (0) 1474 562314 Hydrographic Service Royal Pier Road Gravesend Kent DA12 2BG United Kingdom hydrographic@pla.co.uk www.pla.co.uk/hydrohomepage originator notPlanned Offshore Cable Corridor The Crown Estate Renewable Energy Development Areas 2012-05-15 revision 1 Renewable Energy Lease area The Crown Estate Renewable Energy Development Areas 2012-05-15 revision 1 Post-Construction monitoring The Crown Estate Renewable Energy Development Phases 2012-05-15 revision 1 Bathymetry and Seafloor topography MEDIN Parameter Discipline Keywords 2012-06-09 revision 3 Bathymetry and Elevation SeaDataNet Parameter Discovery Vocabulary 2016-02-17 revision 91 echo sounder BODC parameter semantic model analytical method entity descriptions 2016-03-16 revision 92 Geophysical Oregon Coastal Atlas Coastal Erosion Thesaurus discovery terms 2011-08-20 revision 1 Marine Sediments Global Change Master Directory Science Keyword terms 2007-04-18 revision 4 scouring Marisaurus Thesaurus 2010-09-22 revision 28 sidescan sonars SeaDataNet device categories 2016-03-11 revision 54 Marine Environmental Data and Information Network Marine Environmental Data and Information Network http://marinedataexchange.co.uk/pages/terms-of-use.aspx otherRestrictions otherRestrictions http://marinedataexchange.co.uk/pages/terms-of-use.aspx Available for use providing the originators are acknowledged in any publications produced. eng elevation geoscientificInformation oceans Charting Progress 2 Sea Areas 2009-06-18 creation Southern North Sea International Hydrographic Bureau, Limits of Oceans and Seas 1954-01-01 creation North Sea 1 2 51 52.5 2011-08-30 2011-08-31 http://www.marinedataexchange.co.uk/search?q=#fq=fq%3DProject%253Amde1r2gs21046 download https://www.marinedataexchange.co.uk/details/532/summary A link to the web service or dataset. https://www.marinedataexchange.co.uk A link to the general host site. series This metadata file was created by the Crown Estate for the purpose of uploading to the Marine Data Exchange. This survey represents DONG Deliverable 715.