The Sheringham Shoal and Dudgeon Extensions Offshore Wind Farm Order 2024

Design parameters

Wind turbine generators

1.—(1) Wind turbine generators forming part of the authorised project must not—

(a) exceed a height of 330 metres when measured from HAT to the tip of the vertical blade;

(b) exceed a rotor diameter of 300 metres;

(c) be less than 1.05 kilometres from the nearest wind turbine generator in any direction;

(d) have a distance of less than 30 metres between the lowest point of the rotating blade of the wind turbine generator and HAT;

(e) exceed 23 wind turbine generators in respect of the Sheringham Shoal Extension Project offshore works; or

(f) exceed 30 wind turbine generators in respect of the Dudgeon Extension Project offshore works.

(2) The total rotor-swept area within Work No. 1B must not exceed 1.30 square kilometres.

(3) References to the location of a wind turbine generator are references to the centre point at the base of the wind turbine generator.

Wind turbine generator foundations

2.—(1) Wind turbine generator foundations must be of one or more of the following foundation options: piled monopile, suction bucket monopile, piled jacket, suction bucket jacket or gravity base structure.

(2) No wind turbine generator piled monopile or suction bucket monopile foundation may—

(a) have a pile diameter exceeding 16 metres; or

(b) employ a hammer energy during installation exceeding 5,500 kilojoules.

(3) No wind turbine generator gravity base structure foundation may—

(a) have a seabed base plate exceeding 60 metres in diameter; or

(b) have a gravel footing exceeding 62 metres in diameter.

(4) No wind turbine generator piled jacket or suction bucket jacket foundation may—

(a) have more than four legs;

(b) have more than four piles;

(c) have a pile diameter exceeding four metres; or

(d) employ a hammer energy during installation exceeding 3,000 kilojoules.

(5) Within Work No. 1B, the wind turbine generator foundations must not have—

(a) a total combined seabed footprint (including scour protection) exceeding 610,726 square metres;

(b) a total combined amount of scour protection exceeding 542,867 square metres; or

(c) a total combined volume of scour protection exceeding 1,357,168 cubic metres.

Cables and cable crossings

3.—(1) Within Work No. 2B, the in-field cables must not, in total—

(a) exceed 54 in number;

(b) exceed 135 kilometres in length;

(c) exceed seven cable crossings;

(d) have cable protection (including cable crossings) exceeding 4,000 square metres in area; or

(e) have cable protection (including cable crossings) exceeding 1,000 cubic metres in volume.