Paragraph 6 Detailed offshore design parameters

(1)

The total number of offshore electrical installations and offshore accommodation platforms must not exceed seven, consisting of a combination of no more than—

(a)

four small offshore transformer substations or two large offshore transformer substations;

(b)

two offshore reactive compensation platforms; and

(c)

one offshore accommodation platform.

(2)

The total number of offshore artificial nesting structures must not exceed two.

(3)

The dimensions of any small offshore transformer substation comprised within Work No. 3(a) (including auxiliary structures, such as a helipad, crane, lightning protection, but excluding masts, radar and antennae) forming part of the authorised project must not exceed—

(a)

90 metres in height when measured from LAT;

(b)

90 metres in length; and

(c)

90 metres in width.

(4)

The dimensions of any large offshore transformer substation comprised within Work No. 3(b) (including auxiliary structures, such as a helipad, crane, lightning protection, but excluding masts, radar and antennae) forming part of the authorised project must not exceed—

(a)

100 metres in height when measured from LAT;

(b)

160 metres in length; and

(c)

110 metres in width.

(5)

The dimensions of any offshore reactive compensation platform (including auxiliary structures, such as a crane, but excluding masts, lightning protection, radar and antennae) forming part of the authorised project must not exceed—

(a)

59.2 metres in height when measured from LAT;

(b)

90 metres in length; and

(c)

90 metres in width;

and any masts, lightning protection, radar and antennae forming part of any offshore reactive compensation platform must not exceed 79.2 metres in height when measured from LAT.

(6)

The dimensions of the offshore accommodation platform forming part of the authorised project must not exceed—

(a)

80.2 metres in height when measured from LAT;

(b)

84 metres in length; and

(c)

84 metres in width.

(7)

The dimensions of any offshore artificial nesting structure comprised within Work No. 9 forming part of the authorised project must not exceed—

(a)

60 metres in height when measured from LAT;

(b)

23 metres in length; and

(c)

23 metres in width.

(8)

Offshore accommodation platform foundation structures forming part of the authorised project must be one of either monopile, gravity base structure, pin pile jacket or suction bucket jacket foundations.

(9)

Offshore transformer substation foundation structures forming part of the authorised project must be monopile, gravity base structure, pin pile jacket or suction bucket jacket foundations.

(10)

Offshore artificial nesting structures foundation structures forming part of the authorised project must be monopile, gravity base structure, pin pile jacket or suction bucket jacket foundations.

(11)

In respect of an offshore electrical installation and offshore accommodation platform—

(a)

no monopile foundation may have a diameter greater than 14 metres;

(b)

no gravity base structure foundation may exceed, at the level of the seabed—

(i)

a length of 72 metres; or

(ii)

a width of 36 metres;

(c)

no pin pile jacket foundation forming part of the authorised project may—

(i)

have a pin pile diameter of greater than five metres; or

(ii)

employ more than 24 pin piles per jacket foundation;

(d)

no suction bucket jacket foundation forming part of the authorised project may—

(i)

have a suction bucket diameter of greater than 20 metres; or

(ii)

employ more than eight suction buckets per jacket foundation;

(12)

In respect of an offshore artificial nesting structure—

(a)

no monopile foundation may have a diameter greater than eight metres;

(b)

no gravity base structure foundation may have a diameter at the level of the seabed greater than 50 metres;

(c)

no pin pile jacket foundation forming part of the authorised project may—

(i)

have a pin pile diameter of greater than five metres; or

(ii)

employ more than four pin piles per jacket foundation;

(d)

no suction bucket jacket foundation forming part of the authorised project may—

(i)

have a suction bucket diameter of greater than ten metres; or

(ii)

employ more than four suction buckets per jacket foundation;

(13)

The total seabed footprint area for offshore accommodation platform foundations must not exceed—

(a)

2,600 square metres excluding scour protection; and

(b)

19,600 square metres including scour protection.

(14)

The total seabed footprint area for offshore electrical installation foundations must not exceed—

(a)

15,600 square metres excluding scour protection; and

(b)

117,600 square metres including scour protection.

(15)

The total seabed footprint area for offshore artificial nesting structure foundations must not exceed—

(a)

4,000 square metres excluding scour protection; and

(b)

24,600 square metres including scour protection.

(16)

Offshore reactive compensation platform foundation structures forming part of the authorised project must be monopile, pin pile jacket or suction bucket jacket foundations.