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Rampion Wind Farm - Hazards Post Construction

Please be advised that the below possible hazards have been identified from the Offshore substation along the export cable route and the beach landing.

a)     Float pit areas 1 to 7 - loose and soft ground, possible small boulders

Latitude

Longitude

Comment

Latitude

Longitude

Comment

50°48.593'N

0°19.927'W

NW Corner

50°48.003'N

0°19.343'W

SE Corner

50°48.615'N

0°19.778'W

NE Corner

50°47.927'N

0°19.613'W

SW Corner

 b)     Spoil ground at OSP - disturbed ground possible large rocks

Latitude

Longitude

Comment

Latitude

Longitude

Comment

50°41.933'N

0°16.822'W

NW Corner

50°41.717'N

0°15.952'W

SE Corner

50°41.985'N

0°16.510'W

NE Corner

50°41.563'N

0°16.178'W

SW Corner

 c)     Boulder Relocation Areas containing a concentration of medium sized boulders

Latitude

Longitude

Comment

Latitude

Longitude

Comment

50°41.772'N

0°15.563'W

20m Radius

50°42.822'N

0°17.805'W

20m Radius

50°41.987'N

0°16.147'W

20m Radius

50°43.437'N

0°18.470'W

20m Radius

 d)     EC1 - cable protection (rock berms - shallow burial of cable)

Start Lat

Start Long

Stop Lat

Stop Long

Approx

Length

Comment

50°43.350'N

0°18.533'W

50° 43.333'N

0° 18.525'W

34m

Between 0.5m and 1m above original seabed level - width ~4m. Armour over rock bags

50°41.699'N

0°15.725'W

50° 41.690'N

0° 15.705'W

30m

50°41.680'N

0°15.685'W

50° 41.667'N

0° 15.659'W

40m

 e)     EC2 - cut ends of dead cable, including a rock bag, rock berms, raised cable @ KP3.6

Latitude

Longitude

Comment

50°47.273'N

0°18.917'W

Single rock bag with approximately 13m exposed dead cable on seabed before becoming buried. Possible standing bight (4m long x 0.5m elevation) as transition from burial to exposed cable (rock bag position given). No rock berm.

50°43.053'N

0°18.002'W

20m rock berm pinning cut cable end (centre of rock berm position given) Berm 0.5m to 1m above original seabed level - width ~4m. Rock placed over rock bags

50°42.860'N

0°17.697'W

20m rock berm pinning cut cable end (centre of rock berm position given) Berm 0.5m to 1m above original seabed level - width ~4m. Rock placed over rock bags

50°42.112'N

0°16.300'W

20m rock berm pinning cut cable end (centre of rock berm position given) Berm 0.5m to 1m above original seabed level - width ~4m. Rock placed over rock bags

 f)      EC3 - cable protection (rock berms - shallow cable burial)

Start Lat

Start Long

Stop Lat

Stop Long

Approx Length

Comment

50°43.790'N

0°18.538'W

50° 43.602'N

0° 18.470'W

360m

Between 0.5m and 1m above original seabed level - width ~4m

50°43.558'N

0°18.452'W

50° 43.505'N

0° 18.426'W

100m

50°46.212'N

0°18.757'W

50° 46.185'N

0° 18.760'W

50m

All other areas where backfill and trenching occurred seabed levels generally less than +/- 0.3m from pre-construction levels with occasional isolated high spots up to 0.5m associated with trench spoil artefacts.

 g)     EC4 - cable protection (rock berms - shallow burial), partially filled trench KP2.1 to KP4.5

Rock Berms

Start Lat

Start Long

Stop Lat

Stop Long

Approx Length

Comment

50°45.047'N

0°19.183'W

50°45.001'N

0°19.177'W

70m

Between 0.5m and 1m above original seabed level - width ~4m

50°44.887'N

0°19.137'W

50°44.283'N

0° 18.955'W

1100m

50°41.772'N

0°15.955'W

50°41.727'N

0° 15.852'W

150m

50°41.707'N

0°15.803'W

50°41.682'N

0° 15.747'W

80m

All other areas where backfill and trenching occurred seabed levels generally less than +/- 0.3m from pre-construction levels with occasional isolated high spots up to 0.7m associated with trench spoil artefacts.

 Partially Filled Trench

Latitude

Longitude

Comment

50°47.945'N

0°19.560'W

Start of partially filled trench

50°47.510'N

0°19.278'W

Turn Point

50°46.913'N

0°19.043'W

End of partially filled trench

Trench 3m (+/-1m) and depth of trench below original seabed generally less than 0.3 except for a couple of locations that drop to 0.5m. Cable reported buried at 1m below original seabed level so depth of cover expected to be 0.5m to 0.7m.

a)     EC3 - exposed duct @ FP1

Latitude

Longitude

Comment

50°48.610'N

0°19.835'W

Approximately 40m of duct crowning above seabed

 b)     OSP - Rock bags and berms within 230m of OSP

Latitude

Longitude

Comment

50°41.573'N

0°15.588'W

Various hazards within 230m radius of OSP (OSP centre coordinate given)

c)     FO - Rock bags 290m from OSP

Latitude

Longitude

Comment

50°41.720'N

0°15.673'W

3 X 4 ton rock bags on FO cable 290m @340° from OSP

d)     Wind turbines and offshore substation - Rock bags within 100m of foundation

e)     rock berms present throughout array between WTGs

Please note that the standard safety rules apply when fishing in or near wind farms and associated cables. All mariners are requested to make themselves aware of their obligations for conducting activities over buried and protected cables under International and UK Cable (Sub-sea) Protection Legislation.

  • 1. N Sea North
  • 2. N Sea Central
  • 3. N Sea South / E Channel
  • 4. SW Approaches / W Channel
  • 5. Irish Sea
  • 6. NW Approaches
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