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£100M Scottish sewer tunnel opens

Shieldhall Tunnel

Scottish Water has opened a 5km-long, £100M sewer tunnel in Glasgow. 

Shieldhall tunnel, which took two years to complete, was constructed by Costain Vinci Construction Grand Projets Joint Venture.

More than 500,000 tonnes of earth was excavated and about 3,200 six-segment concrete rings were installed as part of the works. 

Costain project director Neil Grosset said: “Completing this scheme, one of the most challenging of its kind in history, is testament to the passion, skills and team spirit of everyone involved in the project.

“The Shieldhall Tunnel is infrastructure that will have a huge positive impact, reducing the flooding risk and improving the environment for the people of Glasgow and the River Clyde now and in the future.”

The tunnel will alleviate pressure on the existing waste water network and provide an extra 90,000mof extra storm water storage.

It will reduce the amount and frequency of waste water discharged from a number of combined sewer overflows and allow more than 90% of what was discharged to be treated at Shieldhall Waste Water Treatment Works. 

Scottish Water chief executive Douglas Millican said: “We are delighted to have completed the Shieldhall Tunnel, which is the flagship project in Scottish Water’s investment in the waste water infrastructure in the Greater Glasgow area - the biggest in well over a century.

“The city’s waste water infrastructure required major improvements to help transform it into a modern, integrated and sustainable system which will improve the environment and biodiversity on the River Clyde and help tackle flooding.

“As the Greater Glasgow area continues to develop, we are modernising our waste water infrastructure to support the needs of both existing and future customers. 

“The completion of the Shieldhall Tunnel is a key part of that network modernisation.”

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