Our work

Case studies of our projects across the UK.

Water
Wastewater
Environment

Large-scale reservoir refurbishment

We completed a major refurbishment project at a strategically important water treatment works, extending the lifespan – by over 10 years – of a critical asset whilst mitigating the need for a costly and carbon intensive new build alternative.

Storm tank installation

A 55 cubic metre sectional-steel storm tank with sustainable features was installed at a wastewater treatment site to comply with regulations to cut sewage overflows. The works significantly reduced running costs for our client and allowed them to meet specified carbon reduction targets while increasing stormwater capacity to help protect local waterways for decades to come.

Large-scale weir removal

On behalf of the EA we successfully opened 340 miles of catchment in the largest project of its kind – in the country – by removing a 70 meter wide, 900 year old medieval weir. Removing the weir significantly improved fish migration, spawning grounds and habitat. Fallen water levels have also allowed natural ecological processes to recommence.

River embankment maintenance

After a successful past three years, Stonbury was again selected by the Environment Agency to complete essential maintenance works to 35 kilometres of flood embankments along the River Severn.

Lagoon repairs

As the main contractor for refurbishment works, a framework client required Stonbury to install a cofferdam system and carry out repairs to a settling tank at a water treatment works.

Lagoon repair and refurbishment

To extend the life of two final settlement lagoons, Stonbury was required to carry out refurbishment works, which included repairs to the outfall structure, the installation of an EPDM liners and replacement pipework.

Lagoon refurbishment

A final settlement lagoon required repair and refurbishment work due to wildlife damage and bank slippage, which had caused the lagoon to leak. A ‘Land Drainage’ consent from the local council was required before the works to the channel could go ahead.

Riverbank badger exclusion

Stonbury was enlisted by the Environment Agency to relocate badgers and install netting to exclude wildlife from a section of river embankment in preparation for strengthening works.

Riverbank erosion works

Stonbury was enlisted to install emergency erosion control measures to a riverbank in Northwest England after a section had collapsed.

Invasive species clearance

Stonbury was contacted by a local council regarding an on-line balancing pond that was built on the Moorgreen Stream, due to overgrowth of Typha latifolia (bulrush/reedmace) and the presence of the invasive non-native Hydrocotyle ranunculoides (floating pennywort) identified by the Environment Agency.

Silt removal

Stonbury were set to task by the Environment Agency to carefully remove silt from a section of channel in the River Brit.

Slow sand filters repairs

Stonbury were contracted by a framework client to complete ingress repairs to five, 3m deep, slow sand filter wells, at a WTW (Water Treatment Works). One of the wells was a 100 year old structure.

Hydrometric station asset maintenance

Following the successful completion of routine maintenance works at over forty-five hydrometric stations, Stonbury has been awarded several contracts to manage and carry out routine quarterly maintenance at over one hundred gauging sites across Wales.

Sluice gate release

Early contractor involvement resulted in a timely and cost-effective solution for a seized sluice gate that was causing uncontrolled flows.

Spillway & head wall maintenance & repair

As part of a large multi impounding reservoir spillways programme, Stonbury was contracted to complete works to a historic spillway and head wall as part of both safety and maintenance requirements.

Steel tank coating application & removal

Following a statutory inspection by the client, Stonbury were contracted to complete refurbishment works inside a steel tank, which showed severe signs of rusting and peeling of the existing coatings to the walls and soffit.

Debris clearance

Stonbury was contracted by the Environment Agency to clear debris from a ‘dragon’s teeth’ flow device, that has been designed to break up and dissipate the water flow before a bend in the river and to protect strategic pumping assets. The scope also included strimming along a 300m stretch of the riverbank.

Trickling filter column repairs

Stonbury was contracted to make repairs to several column supports for the distribution system surrounding a filter bed at a wastewater treatment site.

Water feature maintenance

Stonbury returns to a water feature it built two years ago as part of a long term maintenance programme.

Get in touch with our expert team

01234 750924

enquiries@stonbury.co.uk