# The Hornsea Three Offshore Wind Farm Order 2020, Paragraph 2

Extent: E+W

(1) The dimensions of any offshore type 1 substations forming part of the authorised project must not exceed—
(a) 90 metres in height when measured from LAT;
(b) 100 metres in length; and
(c) 100 metres in width.
(2) The dimensions of any offshore type 2 substations forming part of the authorised project must not exceed—
(a) 110 metres in height when measured from LAT;
(b) 180 metres in length; and
(c) 90 metres in width.
(3) The dimensions of any offshore HVAC booster station forming part of the authorised project must not exceed—
(a) 90 metres in height when measured from LAT;
(b) 100 metres in length; and
(c) 100 metres in width.
(4) The dimensions of any offshore subsea HVAC booster station forming part of the authorised project must not exceed—
(a) 15 metres in height when measured from the seabed;
(b) 50 metres in length; and
(c) 50 metres in width.
(5) Any bridge located on an offshore electrical installation shall be no longer than 100 metres.
(6) Offshore electrical installation foundation structures forming part of the authorised scheme must be one of the following foundation options—
(a) for offshore type 1 substations, offshore HVAC booster stations and offshore subsea HVAC booster stations either monopile foundations, mono suction bucket foundations, jacket foundations, gravity base foundations, jacket foundations or box-type gravity base foundations; and
(b) for offshore type 2 substations, either monopile foundations, mono suction bucket foundations, jacket foundations, gravity base foundations, jacket foundations, box-type gravity base foundations, pontoon gravity base 1 foundations, or pontoon gravity base 2 foundations.
(7) No offshore electrical installation—
(a) jacket foundation employing pin piles forming part of the authorised project shall have a pin pile diameter of greater than 4 metres; and
(b) monopile foundation forming part of the authorised project shall have a diameter greater than 15 metres.
(8) The total seabed footprint area for offshore electrical installation foundations must not exceed—
(a) 138,900 square metres excluding scour protection; and
(b) 267,900 square metres including scour protection.
(9) The volume of scour protection material for offshore electrical installation foundations must not exceed 291,200 cubic metres.
(10) The total number of cable crossings when combined with the deemed marine licence granted under Schedule 11 of the Order must not exceed 44, unless otherwise agreed between the undertaker and the MMO.
(11) No works permitted under this licence may be undertaken within the boundaries of Markham's Triangle MCZ exclusion zone.—

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Source: https://www.legislation.gov.uk/uksi/2020/1656/schedule/12/part/2/paragraph/2 (the official version)
Page: https://openlegislation.uk/hornsea-three-offshore-wind-farm-order-2020/schedule-12/part-2/paragraph-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.