29. 30.


The wind turbine layout can be described in general terms at this stage. It would have some form of regularity in plan, i.e. wind turbines would be set out in rows.


Based on the maximum number of wind turbines proposed, the minimum separation between wind turbines is:


 In-row spacing - 675m; and  Inter-row spacing - 900m.


31.


The in-row spacing is the distance separating turbines in the main rows, which are generally orientated perpendicular to the prevailing wind, or as close to this as is practical. Inter-row spacing is distance between the main rows. The orientation of the rows is not yet decided. It would depend on a number of factors, such as prevailing wind direction, buildable areas and proximity to site boundaries.


32.


In-row spacing and inter-row spacing (spacing between rows) may vary across the site area. There could be up to three broad layouts because up to three wind turbine groups could be installed.


33.


It should also be noted there may be empty spaces within the windfarm. This could be for wake recovery but more likely due to less favourable ground conditions, e.g. locations with large mobile sand waves.


5.4.4 Foundations 34. Diagrams 5.3 to 5.6 illustrate typical foundation types under consideration i.e. (5.3) jackets, (5.4) gravity base structures, (5.5) suction caissons and (5.6) monopiles.


Tower Access platform Access ladder


J-tube Piles


Vessel base


Diagram 5.3. Typical gravity based structure Diagram 5.4 Typical jacket structure


Preliminary Environmental Information May 2014


East Anglia THREE Offshore Windfarm


Chapter 5 Description of the Development Page 10


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