WP3370-Drainage Works - CTA Main Works

Drainage Overview: Repairs to the existing drainage in the immediate area outside the tunnel portals. Mostly patch repairs with Cured In Place liner. Some elements of robotic cutter required. Element of regrading required to side bore surface to address ponding issue Interfaces: None beyond standard tunnel working Constraints: Works in carriageway during bore closure only Quantities: CIP Liner: 4no. Robotic Cutter to Remove