# The Mona Offshore Wind Farm Order 2025, Paragraph 2: Offshore design parameters

Extent: E+W

(1) The offshore works must be constructed in accordance with the parameters assessed in the environmental statement and set out in Table 2.
(2) The undertaker may not undertake Work No. 1 in a manner which would give rise to any materially new or materially different environmental effects to those identified in the environmental statement and in particular may not exceed the maximum rotor swept area as identified in Table 2.
Table 2ParameterValue
Maximum number of wind turbine generators96
Maximum height of wind turbine generators when measured from LAT to the tip of the vertical blade (metres)364
Maximum rotor diameter of each wind turbine generator (metres)320
Maximum rotor swept area (square metres)5,468,884
Minimum distance from LAT to the lowest point of the rotating blade for each turbine (metres)34
Minimum distance between wind turbine generators in a row of wind turbine generators (metres)1,400
Minimum distance between rows of wind turbine generators (metres)1,400
Maximum diameter of pin piles for wind turbine generators on jacket pin pile foundation (metres)5.5
Maximum diameter of gravity base at the seabed for wind turbine generators on gravity base foundations (metres)49
Maximum diameter of buckets for wind turbine generators on suction bucket jackets (metres)18
Maximum diameter of pin piles for offshore substation platform on jacket pin pile foundations (metres)5.5
Maximum diameter of gravity base at the seabed for offshore substation platforms on gravity base foundations (metres)80
Maximum diameter of buckets for offshore substation platforms on suction bucket jackets (metres)18
Maximum total seabed footprint for wind turbine generators (including scour protection) (square metres)735,488
Maximum number of offshore substation platforms4
Maximum dimensions of offshore substation platforms (excluding towers, helipads, masts, and cranes):
Height of main structure when measured from LAT (metres)70
Length (metres)80
Width (metres)60
Maximum total seabed footprint area for offshore substation foundations (including scour protection) (square metres)24,964
Maximum total length of cables within Work No. 1 (inter-array and interconnector) (kilometres)325
Maximum total length of interconnector cables (kilometres)50
Maximum total length of cables within Work No. 2 (export cables) (kilometres)360
Maximum number of cable crossings (inter-array)67
Maximum number of cable crossings (interconnector)10
Maximum number of cable crossings (export cables)14

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Source: https://www.legislation.gov.uk/uksi/2025/870/schedule/2/paragraph/2 (the official version)
Page: https://openlegislation.uk/mona-offshore-wind-farm-order-2025/schedule-2/paragraph-2/enacted
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.