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The adventure continues at the new wastewater treatment plant — more explicit The adventure goes on at the new plant

3 August 2026
Uebersyren

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Civil EngineeringPublic

The adventure continues at the new wastewater treatment plant — more explicit The adventure goes on at the new plant

More than two years after ground was first broken, construction of the new Uebersyren wastewater treatment plant is entering the home straight. The structural work, carried out by our Civil Engineering teams, will be completed in October.

On the eve of the summer collective leave, the structure is now fully revealed in the landscape. The building is clearly visible, and so are the basins. "Everything you see here stays open," explains Lucas Guastalli, site manager. Before the keys are handed over, the screeds still need to be poured, the windows installed and the painting completed.

A technical challenge overcome

Our teams have just completed the formwork for particularly complex elements that represent one of the project's key challenges: two three-sided pieces and six four-sided pieces, inclined at 50°.

This steep slope creates a settling basin, where particles in the water naturally sink to the bottom before treatment.

The figures speak to the scale of the structure. The project will have required 26,500 m³ of concrete — including a special watertight concrete for all parts in contact with water — and 5,900 tonnes of steel. The main basin stretches 146 metres long and 65 metres wide. An impressive structure, now fully settled into its surroundings.

An additional mission

The project doesn't stop there. The construction of a new basin — more compact at 60 by 30 metres, with 8,000 m³ of earthworks — has been added to the programme. Work will begin after the summer break, with delivery scheduled for September 2027.

Further works will follow to complete the whole: pipe jacking — a technique for installing pipes underground without digging a trench — to connect the new facility to the original plant, the installation of the utility networks and the resurfacing of the access road.

Once operational, the new treatment plant will process wastewater from the entire east of the country, with a significantly increased capacity. A large-scale project in service of the environment!

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