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2013, CT Offshore, Greater Gabbard, Multibeam Survey

2013, CT Offshore, Greater Gabbard, Multibeam Survey

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Geophysical

Description

 Greater Gabbard Offshore Winds Ltd have recently completed the construction of a wind farm approximately
14mi east of Suffolk coast.
The offshore wind farm consists of 152 Wind Turbine Generators (WTGs) with a gross nameplate capacity of
approximately 504MW. The project is now fully operational and the construction was completed in September
2012.
GGOWL signed up CT Offshore to conduct survey of the inter array cables.
Water depths along the CTO scope of work vary between approx. 22 (LAT) at the point closest to the shore and
32m (LAT) furthest south west.
Inspection of seabed bathymetry along the route of all 152 IA cable routes extending to 50m either side
of each cable (i.e. 100m wide survey centred on cable).
The cable route surveys should identify any exposed or free spanning sections of cable, any cable loops
emergent from the seabed and the presence and location of any installed cable protection systems. Where
possible, the IA cable surveys should cover the full span of the cable up to and including the cable monopile
entry point and should illustrate exposed and free spanning cable in the vicinity of the monopiles. Where it is not
possible to survey up to the monopole, the cable survey should extend as close to the structure as is deemed
safe to do so.
The survey must quantify the seabed position relative to lowest astronomical tide (LAT) thereby enabling any
seabed movements relative to seabed position in 2009 to be quantified.
The survey of the inter array cables shall include survey of the OSP’s (IGSUB and GASUB).
Multibeam Survey is conducted to achieve the above results.

Dataset

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CT Offshore, Multibeam Survey April-May 2013, Greater Gabbard, Sound Velocity Profile Logs - Results

CT Offshore, Multibeam Survey April-May 2013, Greater Gabbard, Multi Beam Echo-Sounder Bathymetry RAW Data

CT Offshore, Multibeam Survey April-May 2013, Greater Gabbard, Geo TIFF Bathymetry - 1m Resolution

CT Offshore, Multibeam Survey April-May 2013, Greater Gabbard, Cleaned and QC'd XYZ Base Bathymetry Data

CT Offshore, Multibeam Survey April-May 2013, Greater Gabbard, Survey Vessel Track

Report

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CT Offshore, Multibeam Survey April-May 2013, Greater Gabbard, Survey Report

CTO GGOWL Multibeam Survey April-May 2013 Daily Progress Reports

Multibeam Survey April-May 2013, Greater Gabbard, Monopile Scour Charts and Reports

Multibeam Survey April-May 2013, Greater Gabbard, Inter Array Charts

Multibeam Survey April-May 2013, Greater Gabbard, Survey Equipment and Calibration Certificates

CTO GGOWL Multibeam Survey April-Vessel and ROV Specification Sheets

CTO GGOWL Multibeam Survey April-CTO Company Safety Policy

CTO GGOWL Multibeam Survey April-May 2013 Method Statement and Risk Assesment

Multibeam Survey April-May 2013, Greater Gabbard, EIVA Calibration and Test Report