# The Hornsea Four Offshore Wind Farm Order 2023, Paragraph 2: Detailed offshore design parameters

Extent: E+W+S

(1) The total number of wind turbine generators comprised in the authorised project must not exceed 180.
(2) Subject to sub-paragraph (3), each wind turbine generator forming part of the authorised project must not—
(a) exceed a height of 370 metres when measured from LAT to the tip of the vertical blade;
(b) exceed a rotor diameter of 305 metres;
(c) be less than 42.43 metres from LAT to the lowest point of the rotating blade; and
(d) be less than 810 metres from the nearest wind turbine generator in all directions.
(3) The minimum distance in sub-paragraph (2)(d) between each wind turbine generator is to be measured from the centre point of the wind turbine generator.
(4) Wind turbine generator foundation structures forming part of the authorised project must be one of either monopile foundations, mono suction bucket foundations or jacket foundations.
(5) No wind turbine generator—
(a) jacket foundations employing pin piles forming part of the authorised project may—
(i) have a pin pile diameter of greater than four metres; and
(ii) employ more than 16 pin piles per jacket foundation; and
(b) monopile foundation forming part of the authorised project may have a diameter greater than 15 metres.
(6) The total combined seabed footprint area for wind turbine generator foundations must not exceed—
(a) 302,180 square metres excluding scour protection; and
(b) 985,240 square metres including scour protection.
(7) The wind turbine generators comprised in the authorised project must be constructed in accordance with the parameters set out in the pro–rata annex.

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Source: https://www.legislation.gov.uk/uksi/2023/800/schedule/1/part/3/paragraph/2 (the official version)
Page: https://openlegislation.uk/hornsea-four-offshore-wind-farm-order-2023/schedule-1/part-3/paragraph-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.