- We have recently been working to install an a new and innovative overflow mechanism called a ‘Tideflex valve’, this has been installed at the overflow point from the Holloway Storm Relief Sewer. The Tideflex valve has been tested over the past few months and requires some adjustments to be made in order to work more effectively.
- A vent column is now in place adjacent to Limehouse DLR station and the underground pipework to the vent column has been connected.
What’s coming up:
- The project is currently installing a series of safety systems to ensure the team are safe whilst working in the sewer system. The Storm relief sewer cannot be isolated or diverted during the works and so the team must rely on a series of sensors and isolations to ensure their safety.
- The excavation to construct a weir chamber will continue until it reaches the Holloway Storm Relief Sewer, around five metres below ground level.
- The Holloway Storm Relief Sewer will be carefully cut open in sections, and lifted out of the excavation.
- The base of the excavation will be sealed with a concrete layer. The concrete walls of the chamber will then be built. This will involve three separate stages of building up the formwork, pouring concrete and letting it set.
- A flap valve will be lowered into the excavation fixed in place. This is a flow control mechanism and an additional safety measure to protect the workforce when they are in the sewer.
- The team will then work inside the Holloway Storm Relief Sewer in order to build a sloping floor inside the sewer. This will modify the existing hydraulics so that stormwater will then be able to flow into an existing Thames Water sewer, rather than into the River Thames.
- Standard working hours are 8am to 6pm Monday-Friday and 8am-12pm Saturday. Also, there is a 1 hour mobilisation period before and after the Standard Working Hours, plus maintenance periods on Saturday 1-5pm and Sundays 10am-4pm.
- We hold monthly drop-in sessions in the Yurt, St Katherine's Precinct Reflective Area, 2 Butcher Row, London E14 8DS. The next drop in will be announced shortly.
- Hoardings enclose the construction site
- The access route to properties on Bekesbourne Street to the south of the site is being maintained
- The pedestrian route along the eastern side of Bekesbourne Street adjacent to John Scurr House is being maintained
- Static machinery and plant is being screened or enclosed
- Vehicle movements outside of standard hours are being restricted
- Small vehicles are being used to reduce potential traffic conflicts
There are lots of ways to find out what’s happening at this site, you can: