ABSTRACT
The Feeder 9, River Humber Pipeline project is required to replace the existing Feeder 9 gas pipeline with a new 1,050 mm high pressure gas pipeline under the estuary of the River Humber. To avoid any impact on the local environment which includes a designated RAMSAR 8 and SSSI site the pipeline will be installed inside a precast concrete lined tunnel. The tunnel is being excavated utilising a 4.4 m diameter Slurry Pressure Balance Machine (SPBM) to provide a tunnel of 4.9 km in length with an internal diameter of 3.65 m. Following completion of the tunnelling works the project team will insert the pipeline in a continuous 4,992 m string into the water filled tunnel before connecting at each end to the existing Feeder 9 pipeline. The project commenced in May 2016 and is programmed to be complete by November 2020.
