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New Sewage Treatment Works contract awarded

10 April 2018

​The Minister for Infrastructure has signed a Ministerial Decision awarding the main design and build construction contract for the new sewage treatment works (STW) at Bellozanne to North Midland Construction PLC (NMC), a UK construction company.

This brings the Island a step closer to getting a much-needed replacement to the existing ageing plant, which will ultimately provide full wastewater treatment for a population of 118,000, but with capacity built in for a possible 20% growth.

It will also provide better and more consistent treatment quality than the existing plant and significantly reduce dilute sewage spills to sea.

The £56m construction contract was awarded following the usual States tender procedure and starts on site next month. 

Although the main contractor is from the UK, they will be working with local contractor Geomarine, who will be a major sub-contract partner.

It is anticipated that the new STW will be commissioned in Phases and be fully operational by early 2022.

In preparation for the start of construction, the Department has already undertaken the following enabling works:

  • the demolition of the old sludge digester plant on the opposite side of the road to the existing STW
  • the re-location of the Household Recycling Centre to La Collette
  • the construction of a new Clinical Waste Incinerator at la Collette to allow the existing poorly performing plant at Bellozanne to be demolished
  • the excavation and stabilisation of approximately 150,000 tonnes of hillside to create the room to build a new plant

The Minister for Infrastructure, Deputy Eddie Noel said, “The replacement of the Sewage Treatment Works is a really vital project for the Island. I am pleased that we have now got the project to contract stage and that construction can now start in May.”

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