The newly re-routed River Trent has seen part of its surrounding structure collapse.
The white brickwork was spotted by a passerby who snapped a picture of the blocks sunk into the river bed.
It comes as around 40,000 tonnes of earth were recently excavated at Stoke City’s old Victoria Ground site to create a new meandering course through the city.
The historic re-routing was even showcased by BBC One’s Countryfile programme and is part of the SUNRISE project, a £3.6 million urban conservation initiative focusing on restoring and improving natural habitats at 16 sites across Stoke-on-Trent and Newcastle.
SUNRISE project manager Richard Guy said: “We’re aware that a short section of the embankment wall has collapsed and we’re fixing it.
“The site is still an active construction site with no public access and the full project is not due to be completed until 2021. We’ve been informed by our contractors that there is no risk to the public or nearby properties.”
Led by the Staffordshire Wildlife Trust, the construction of the new 500m river channel is set to vastly improve the stretch of the waterway for flora and fauna.
Natural materials, including several thousands of tonnes of gravel and huge tree trunks taken from the site have also been added to the new channel.
Landowner St Modwen – who had a hand in the design of the new route – will begin working on the wider development of the site imminently.
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Matt Lawrence, project executive for the Environment Agency, said: “This is an imaginative and inspiring use of a derelict brownfield site that will benefit the biodiversity of the River Trent as well as offering improved amenities for residents in the city.
“The project has been some years in the making, but is a great success and everyone involved with it should be very proud to see it reach fruition.”
SUNRISE has primarily been funded by the ERDF (European Regional Development Fund) and led by Stoke-on-Trent City Council. Other partner supporting the project include Newcastle Borough Council, the Environment Agency, Groundwork West Midlands and the Wild Trout Trust.