The Burbo Bank Extension Offshore Wind Farm Order 2014

Time limits

6.—(1) Each steel monopile foundation forming part of the authorised development (excluding scour protection) shall not have a diameter which is greater than 8 metres.

(2) Each gravity base foundation forming part of the authorised development (excluding scour protection) must not have—

(a) a diameter at the level of the seabed which is greater than 35 metres;

(b) in the case of the WTGs, a base height which is greater than 6 metres above the level of the seabed;

(c) in the case of the offshore substation, a base height which is greater than 16 metres above the level of the seabed and less than 1 metre below LAT;

(d) in the case of the WTGs, a column diameter of greater than 9 metres.

(3) Each jacket foundation forming part of the authorised development (excluding scour protection) must not have—

(a) a width spacing between each leg at the level of the seabed which is greater than 35 metres;

(b) a leg diameter which is greater than 3 metres;

(c) a width spacing between each leg at MHWS which is greater than 35 metres;

(d) a pile sleeve height which is greater than 18 metres above the level of the seabed;

(e) a pile diameter which is more than 3 metres;

(f) more than one pile per leg, save in the case of the offshore substation where it shall not have more than four piles per leg;

(g) more than four legs;

(h) in the case of the offshore substation only, a suction caisson per leg which is greater than 15 metres in diameter.

(4) To reduce potential impacts on adult salmon migration—

(a) no more than 69 steel monopile foundations with a pile diameter of 6 metres or less (excluding scour protection) shall be installed as part of the authorised development;

(b) no more than 65 steel monopile foundations with a pile diameter between 6 metres and 6.5 metres (excluding scour protection) shall be installed as part of the authorised development;

(c) no more than 55 steel monopile foundations with a pile diameter between 6.5 metres and 7.5 metres (excluding scour protection) shall be installed as part of the authorised development;

(d) no more than 45 steel monopile foundations with a pile diameter between 7.5 metres and 8 metres (excluding scour protection) shall be installed as part of the authorised development.