Scotland’s biggest sewer superstructure has become operational in a feat of engineering hailed as “extraordinary” by Environment Secretary Roseanna Cunningham.
said the Shieldhall Tunnel in Glasgow built on the legacy of the
country’s engineering and water pioneers and would benefit
communities for centuries to come.
Cunningham visited the Scottish Water control room where the
country’s vast network of pipes and sewers are managed and
monitored around the clock.
have started to run through the tunnel from across the south-side of
Glasgow with communities expected to benefit from fewer flooding
incidents and improved environmental conditions.
Cunningham said: “The strategic importance of the Shieldhall Tunnel
as part of the ongoing investment across Glasgow by Scottish Water
cannot be understated. It’s a fantastic example of the capital
investment programme delivering real long-term benefits for
communities to reduce flooding, help
deal with the impact of climate change
and improve the environment.
“Much of our underground infrastructure for water and waste water dates to the Victorian era when we proudly led the way in introducing massive improvements to deliver positive impact on the health of our communities. Communities across Glasgow will benefit for years to come from this latest extraordinary feat of engineering which lies hidden deep beneath the city.
“It represents the latest chapter in our collective aim to provide safe and sustainable ways of managing waste in our biggest city. It is a significant part of the overall investment in Greater Glasgow which is essential to economic prosperity regionally and nationally. Scottish Water is investing £3.5bn throughout the country to deliver infrastructure which is fit for communities now and for decades to come.”
The tunnel is the flagship project in Scottish Water’s investment in the Glasgow area’s waste water infrastructure, the biggest since Victorian times, and stretches for 3.1 miles from Craigton to Queen’s Park via Bellahouston and Pollok parks.
was constructed over almost two years by a team of more than 100
workers, from countries across the world, using a state-of-the-art
tunnel boring machine (TBM) named Daisy the Driller by a local
schoolboy, which weighed 1000 tonnes and was longer than 14 buses.
The tunnel will alleviate pressure on the existing waste water network with 90,000 cubic metres of extra storm water storage. That’s more than 108m litres or the equivalent of 36 Olympic-sized swimming pools.
will also reduce the risk of flooding in Aikenhead Road and Curtis
Avenue in Mount Florida and Robslee Drive, Robslee Road, Robslee
Crescent and Orchard Park Avenue in Giffnock.
of the key facts and figures about the £100 million tunnel include:
- More than 500,000 tonnes of earth, stone and clay was excavated.
- More than 3200 six-segment concrete rings were installed.
- It took over 1.5 million working hours to construct.
- Over 90% of material excavated was recycled.
tunnel will substantially reduce the amount and frequency of waste
water discharged from a number of Combined Sewer Overflows (CSOs) and
enable more than 90% of what was discharged at these CSOs to be
treated at Shieldhall Waste Water Treatment Works before being
Douglas Millican, Scottish Water’s Chief Executive, 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.
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.
the Greater Glasgow area continues to develop, we are modernising our
waste water infrastructure to support the needs of both existing and
completion of the Shieldhall Tunnel is a key part of that network
Flanagan, Scottish Water Project Manager, said: “Many hundreds of
people have worked as part of Costain VINCI Construction Grand
Projets (correct) Joint Venture (CVJV), which was set up to deliver
enable the construction of the tunnel required a wide range of
specialist skills, knowledge and expertise. Over the course of the
project, our workforce has included local contractors and those with
international experience and backgrounds.
are all enormously proud of what we have achieved for the good of the
people of Greater Glasgow.”
Grosset, the Project Director, of Costain, said: “Everyone
in the Costain and VINCI Construction Grands Projets team is
delighted to have delivered the Shieldhall Tunnel project for
Scottish Water and the people of Glasgow. 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
environment for the people of Glasgow and the River Clyde now and in
further information please contact the Scottish Water press office on
or Keith Sinclair, Media Manager, on 0141
414 7186 or