A complex and sensitive water pipeline project has been successfully completed under a Lancashire riverbed.
Drainage and pipeline specialist Waitings used six JCB excavators to lay 140m of pipeline, over a 24 hour time frame during low tide at the river. The project for United Utilities and main contractor VolkerStevin involved the installation of a sewer pipeline, constructed along the bank of the River Lune.
After the JCB JS models had excavated a two metre trench in the riverbed, the entire 35t pipe string was pressure tested and carried into the channel by the six JCB excavators which were evenly spaced across the river.
The pipeline was then lowered into place, weighed down by pumping water into it and secured in place by 17 special cast 5t concrete blocks.
The task was subject to the strict timeframe imposed by the Environment Agency due to tidal influence and unseasonal flood risks in the region.