10.
Any significant sources of contamination within 250m of the onshore electrical transmission works as identified in Chapter 19 Soils, Geology and Ground Conditions will be considered in this chapter with regards to the potential risk to groundwater and surface water receptors.
11. Detailed engineering design, route refinement, and additional information were sought for the onshore cable route, Construction Consolidation Sites (CCS) and associated temporary works (area / access roads) during the EIA undertaken for East Anglia ONE. This assessment draws primarily on the information provided within the ES for East Anglia ONE as the landfall and onshore cable route are shared (see Chapter 5 Description of the Development). The ES for East Anglia ONE also identified the converter station locations for the East Anglia ONE, East Anglia THREE and East Anglia FOUR projects.
21.3.2 Worst Case 12.
There are two scenarios for the installation of onshore cables for East Anglia THREE: Scenario 1: use of pre-installed ducts; or
Scenario 2: open-trenching for cables for East Anglia THREE and installation of ducts for East Anglia FOUR.
13.
Scenario 1 assumes that during the construction of East Anglia ONE the following are undertaken:
Installation of up to four cables along 37km of the cable route (mostly via open trenching) with haul road along the entire length together with installation of up to 8 ducts for cables from future projects (East Anglia THREE and East Anglia FOUR).
HDD for up to 12 cables at 8 points along the route.
Removal of the haul road and reinstatement of land and features along 37km of the cable route.
14. Therefore for East Anglia THREE the following works are required at a later date:
Creation of up to four jointing pits (assuming each cable jointed in its own pit) at up to 61 locations along the cable route.
Transport to site, cable pulling and jointing at up to 244 jointing pits. Temporary lay-down areas of 300m2 at each of up to 61 locations.
Preliminary Environmental Information May 2014
East Anglia THREE Offshore Windfarm
Chapter 21 Water Resource and Flood Risk Page 6
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58