Work No. 15 – shown on sheet 3 of the works plans and being the construction of the new Silvertown Tunnel northern approach, to include—
(a)the improvement of a length of 140 metres of the existing northbound and southbound two-lane standard carriageways of the A1020 Lower Lea Crossing from the point at which it crosses the DLR to its junction with the improved Tidal Basin Roundabout (Work No. 16);
(b)the construction of a two-lane carriageway over a length of 70 metres forming the new southbound carriageway of the Silvertown Tunnel northern approach, crossing through the improved Tidal Basin Roundabout (Work No. 16);
(c)the construction of a new open-cut highway over a length of 220 metres with two-lane carriageways in each direction from the junction with the improved Tidal Basin Roundabout (Work No. 16) to the proposed North Portal of the Silvertown Tunnel (Silvertown) (Work No. 1) and with retaining walls of varied height in both verges;
(d)the construction of an anti-recirculation wall at the North portal;
(e)the construction of a ground slab beneath the carriageway;
(f)the construction of a new central reservation between the northbound and southbound carriageways of the new Silvertown Tunnel northern approach, including a new cross-over facility;
(g)the construction of a new overhead signage and traffic management equipment gantry;
(h)the construction of an improved non-motorised user route along the improved A1020 Lower Lea Crossing with crossing points;
(i)the construction of a new slip road from the southbound carriageway of the improved A1020 Lower Lea Crossing linking to the improved Tidal Basin Roundabout (Work No. 16);
(j)the construction of a new slip road between the existing A1020 Silvertown Way northbound off-slip and the new Silvertown Tunnel northern approach southbound carriageway; and
(k)the construction of drainage attenuation tanks and associated infrastructure behind the retaining walls of the open cut section of the new Silvertown Tunnel northern approach.