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Plate 2 – Jointing pit Layout and Cable Pulling (Photo Courtesy of Prysmian) 4.6
At the same time as power cable installation the fibre optic communications cables would be installed in smaller ducts pre-installed at the same time as the cable ducts.
Pre-installed ducts - assumptions
4.7 Option 1 (pre-installed ducts) 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 future projects (East Anglia THREE and East Anglia FOUR);
4.8
Creation of up to two jointing pits at up to 40 locations along the cable route; HDD for up to 4 cables and 8 ducts at 10 points along the route; and
Removal of the haul road and reinstatement of land and features along 37km of the cable route.
Therefore for each of East Anglia THREE and East Anglia FOUR the following works would then be required at a later date:
Creation of up to two jointing pits at up to 40 locations along the cable route; Transport to site, cable pulling and jointing at up to 40 jointing pits;
Temporary lay-down areas of 300m2 at each of up to 40 locations (assuming that one lay-down area serves both pits); and
Access via existing roads/tracks and therefore no haul road is required except where joints are placed in remote areas. Maximum of 10km of haul road required. Temporary track matting may be required if ground conditions are very poor.