Scottish Water has reached a major milestone in its sewer pipeline project in Perth - more than five kilometres of new sewer has been installed in the Inveralmond area of the city, as the project enters the final stretch.
The water company’s multi-million pound investment in upgrading the waste water network in Perth has seen the installation of the new sewer to reduce the risk of sewer flooding ensuring infrastructure can support city’s future growth – including new homes and businesses, while protecting the environment.
Once the final pieces of sewer pipeline have been laid, the next step is to connect it to the existing network, which includes Tay Street’s ‘Super Sewer’ – a 2.2m diameter pipe running alongside the River Tay underneath Tay Street and Shore Road.
Most of this pipeline has been constructed using open-cut methods, with trenchless techniques used in high-traffic areas to minimise disruption, including underneath the A9 at the Inveralmond roundabout.
As part of the publicly-owned utilities major programme of infrastructure investment, the existing Almondbank Waste Water Treatment Works will also be replaced with a new Waste Water Pumping Station, designed to handle flows of 21 litres per second — a change made possible by the increased treatment capacity soon to be available at Perth Waste Water Treatment Works.
A new flow control chamber near the A9 Inveralmond Roundabout and new emergency storage, providing additional resilience during periods of heavy rainfall and reducing the risk of sewer flooding to homes and businesses, are also being delivered.
Scottish Water’s Senior Project Manager, David Lavery, said:
“This is a vital investment for Perth’s future.
“By connecting our new sewer pipeline into the super sewer at Tay Street we’re creating a robust system that will protect the environment and support the city’s growth for decades to come.
“We’re currently on track for completion in Spring 2026 and want to thank residents and businesses for their patience as we progress these essential works.”
Once completed, the upgraded network will be able to serve a population equivalent of more than 100,000, protecting Perth’s residents and businesses from sewer flooding and strengthening long-term environmental performance.
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