Culvert installed under the Canal
Walkers, runners, cyclists and of course canal boat enthusiasts will have noticed Costain works to the Slynedales Canal of late. As part of the Heysham to M6 Link Road scheme, works have included a crossing of Lancaster Canal. In the past few weeks engineers have installed two Portadam units that drain a section of the canal between the two dams.
Once drained, workers were tasked with removing decades of silt that’s built up in the bottom of the canal. Litter included bottles and cans, not to mention a tin hat! This was sucked from the canal into specialist vacuum tankers which disposed of it at a licensed tip.
Once the silt was removed, the puddle clay that lined the canal and stopped it from leaking was also removed. This will be reused once the culvert is installed.
The canal bed was then filled with stone to make a platform to track a 30 tonne excavator from one side to the other. This enabled a reduction in the work needed on the side of the nearby residential cul-de-sac, reducing impact and disruption on local residents.
Costain workers have installed the first manhole and are now digging under the canal installing the 1200mm diameter pipeline before sheet piling the banks, reinstating the towpath, and re-opening up the canal to traffic by 1st April.