2012 04 aggregate dredging dr andrew bellamy, tarmac marine dredging ltd
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Humber
East Coast
Thames
East English Channel
South Coast
South West
North West
City of Cardiff
Commissioned 1997
Length 72 m
Capacity 2,300t
Service Speed 11kn
Dredge depth 35 m
BCA Avonmouth
BCA Avonmouth
Swansea
Bristol Channel resource gradings from grab and core samples
N Bristol Deep 470
Culver 472 Western Bristol Channel fine
Western Bristol Channel coarse
Sieve size (mm) Percentage passing
20 100
14 98
10 84
5 68
2 100 59
1.18 99 100 57
0.6 97 100 98 52
0.425 85 98 87 39
0.3 60 70 24 22
0.212 13 14 4 8
0.15 4 2 3 3
0.063 2 1 2 2