The Hornsea Two Offshore Wind Farm Order 2016

Design parameters E+W+S

1.—(1) No offshore HVAC collector substation forming part of Work No. 2A may—

(a) exceed 64 metres in height above LAT;

(b) have a platform that at its greatest extent exceeds 3,600 square metres in area or 60 metres in width.

(2) No offshore HVDC converter substation forming part of Work No. 2A may—

(a) exceed 110 metres in height above LAT;

(b) have a platform that at its greatest extent exceeds 16,200 square metres in area or 180 metres in width.

(3) The offshore reactive compensation substation comprised in Work No. 3A must not—

(a) exceed 64 metres in height above LAT; or

(b) have a platform that at its greatest extent exceeds 3,600 square metres in area or 60 metres in width.

(4) The diameter of the electrical cables comprising the electrical circuits must not exceed—

(a) within Work No. 2A, 300 millimetres;

(b) within Work Nos. 4A and 5A—

(i) 190 millimetres, where the mode of transmission is HVDC; and

(ii) 300 millimetres, where the mode of transmission is HVAC.

(5) The combined total length of the connections in the form of electrical circuits between the structures comprised in Work Nos. 2A and 2B must not exceed 300 kilometres.

(6) The combined total length of the electrical circuits comprised in Work Nos. 4A, 4B, 5A and 5B seaward of MHWS must not exceed 1,200 kilometres.

(7) The combined total area of cable protection for the electrical circuits comprising Work Nos. 2A and 2B must not exceed 546,000 square metres.

(8) The combined total area of cable protection for the electrical circuits comprising Work Nos. 4A and 4B located outside the Humber Estuary Special Area of Conservation must not exceed 2,055,200 square metres.

(9) The combined total area of cable protection for the electrical circuits comprising Work Nos. 4A and 4B located within the Humber Estuary Special Area of Conservation must not exceed 44,800 square metres.

(10) The combined total volume of cable protection for the electrical circuits comprising Work Nos. 2A and 2B must not exceed 312,000 cubic metres.

(11) The combined total volume of cable protection for the electrical circuits comprising Work Nos. 4A and 4B located outside the Humber Estuary Special Area of Conservation must not exceed 1,174,400 cubic metres.

(12) The combined total volume of cable protection for the electrical circuits comprising Work Nos. 4A and 4B located within the Humber Estuary Special Area of Conservation must not exceed 25,600 cubic metres.

(13) The electrical circuits comprised in Work Nos. 2A and 4A must be installed by use of, or a combination of, ploughing, trenching, jetting, rock-cutting, dredging, surface laying with post-lay burial, and where ground conditions make burial impracticable, by surface laying.

(14) The electrical circuits comprised in Work No. 5A must be installed by use of, or a combination of, ploughing, trenching and jetting, with the exception that, where the electrical circuits comprised in Work No. 5A cross under the existing sea wall, they must be installed using a trenchless technique.

Commencement Information

I1 Sch. 9 Pt. 2 para. 1 in force at 7.9.2016, see art. 1(2)