Impact
Table 20.3. Worst Case Assumptions Parameter
Construction
Construction Dust
Construction Dust
Construction Dust
Construction Dust
Construction Dust
Construction Dust
Construction Dust
Construction Dust
Construction Dust
Construction Dust
Construction Dust
Construction Dust
Construction Dust
Construction Dust
Construction Dust
Construction
Preliminary Environmental Information May 2014
Jointing pits Jointing pit spoil Cable trench spoil Residual spoil Lay-down areas
footprint of laydown area
Trenching area and depth
CCS sites CCS landtake
8 HDD locations required (7 along onshore cable route and 1 at landfall)
HDD compound landtakes (15 compounds)
Number of onshore cables
Converter station compound area and building volume
Duration of works
Landfall
Export Cables
244 pits, each 30m2 and 2.5m deep
38,888m3 N/A N/A 61 300m2 N/A 9
10ha (secondary) 15ha (primary)
Cables pulled through existing ducts
N/A 4
2.61ha 246,500m3
10 weeks 44 weeks Converter 55 weeks
192 pits, each 30m2 and 2.5m deep
30,600m3 154,416m3 36,034m3 N/A N/A
32.17km long x 0.8m wide x 1.5m deep each for up to four trenches
9
10ha (secondary) 15ha (primary)
8 HDD operations
Scenario 1
Scenario 2
3,750m2per compound 4
2.61ha 246,500m3
10 weeks 44 weeks 55 weeks East Anglia THREE Offshore Windfarm
Chapter 20 Air Quality Page 4
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