Scottish Water is making good progress with the construction of a half mile-long sewer tunnel beneath the streets of the Yoker area of Glasgow as part of a £7 million project to help improve the water quality and natural environment of the River Clyde and tackle flooding issues.
The water company is now almost half way through the work on the project, which started in July 2015. The scheme involves the construction of a new sewer tunnel from the grounds of the former Blawarthill Hospital to the north bank of the Clyde.
The project, which also involves the construction of a new Combined Sewer Overflow (CSO) with powered screens at the former hospital site near Dyke Road, will improve water quality on the Yoker Burn culvert and the Clyde and help tackle flooding issues which have affected a commercial property in Dumbarton Road.
The new stretch of sewer, which will be about eight metres deep, is being installed using a specially constructed Tunnel Boring Machine (TBM) rather than using the open cut method of excavating because this method is easier and minimises disruption. The TBM, which is 2.2 metres in diameter and 6.7 metres long, is progressing at a rate of about seven metres per day and is excavating silt and clay. At the moment, the TBM, which is powered by a diesel generator and is operated by a TBM operator at the front of the TBM with another in the shaft to control the hydraulic rams, is about 30% of the way along the route.
The new CSO at the former hospital grounds will spill waste water in storm conditions to the new sewer and the new sewer will discharge the waste water to the River Clyde, as permitted by the Scottish Environment Protection Agency (SEPA).
Contractors George Leslie, working for Scottish Water, are expected to complete the work late this summer, depending on weather conditions.
The project is part of an investment of about £10.5 million in improvements to the waste water infrastructure in the Yoker area and part of Clydebank, which started in November 2014.
The improvement work in Yoker and Clydebank is part of Scottish Water’s £250 million investment in the Greater Glasgow area’s waste water network, the biggest in more than a century, which will improve river water quality and the natural environment of the River Clyde and its tributaries, enable the area to grow and develop, alleviate sewer flooding and deal with the effects of increased rainfall and climate change.
The Greater Glasgow area investment follows years of collaboration and studies by the Metropolitan Glasgow Strategic Drainage Partnership (MGSDP), whose partners include Scottish Water, the Scottish Environment Protection Agency (SEPA), Glasgow City Council and Scottish Canals.
The investment in Yoker and Clydebank will, like many other projects, help achieve the MGSDP’s vision to transform how the Greater Glasgow area thinks about and manages rainfall to end uncontrolled flooding and improve river water quality.
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