en.Wedoany.com Reported - Yorkshire Water has launched a £3.6 million project at Carver Fields near Hagg Lane in Sheffield to construct a large underground stormwater storage tank as part of its £1.5 billion storm overflow reduction programme, aimed at protecting the River Rivelin.

The tank, with a capacity of 2,500 cubic metres (2.5 million litres), will temporarily store excess wastewater and surface water during prolonged or heavy rainfall. The project will intercept flows from the Rivelin Valley Combined Sewer Overflow (CSO), preventing untreated discharges from entering the river. Stored water will be returned to the system for full treatment when network capacity allows.

Joe Johnson, Senior Project Manager at Yorkshire Water, stated that this is one of 21 major storm overflow projects in Sheffield, delivered by contract partner Ward & Burke, with work commencing on site on 6 July. He added that reducing storm overflow discharges is critical to customers, and upon completion, the annual number of discharges from the Rivelin Valley CSO will be reduced to fewer than 10.

Carver Fields was selected following detailed surveys due to its suitable local geological conditions, proximity to existing sewers, and minimal disruption to the wider community. Yorkshire Water is working with the owners of Carver Fields Church to minimise disruption. The project is expected to take 18 months, after which the site will be fully restored.

This project is part of Yorkshire Water's largest-ever environmental investment plan, with a commitment of £8.3 billion over the next five years to upgrade infrastructure and improve services. Of this, £1.5 billion is specifically allocated to reducing reliance on storm overflows through the construction of new surface water sewers, underground storage tanks, nature-based solutions, and sustainable drainage systems. These measures aim to strengthen the sewer network and improve river and coastal water quality, following a £180 million investment over the past two years that helped reduce discharges into waterways by 12% in 2024 compared to 2023.

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