Seqwater has finished replacing one of the oldest pipelines in the SEQ Water Grid, ensuring the reliability of drinking water supply to more than 50,000 residents in Brisbane’s north-west.

The $4.2 million upgrade started in July 2016, with construction carried out between Ashgrove and Enoggera over the past nine months.

The work involved retiring a 75-year-old underground pipeline along Wardell Street and replacing it with two new sections of underground pipeline.

It was delivered in three stages and involved drilling under sections of roads and railway line, as well as excavating in roads and road reserves.

About 2.2 kilometres of large diameter pipeline was laid between Victoria and Bridge Streets in Ashgrove and also between Lloyd Street in Alderley and Pickering Street in Enoggera.

As soon as both new pipelines were ready to start moving water, the old pipeline along Wardell Street was taken out of action.

Seqwater Chief Executive Officer Jim Pruss said the upgrade was very important to improve water supply in the northern suburbs of Brisbane.

“The new pipelines improve the reliability and security of water supply to the area,” Mr Pruss said.

“This upgrade is one of a number of infrastructure projects planned across our region to improve the performance and reliability of the SEQ Water Grid – our connected water network of dams, treatment plants, reservoirs and pipelines.”

Mr Pruss thanked residents and road users for their patience and understanding during the work.

Seqwater worked closely with Queensland Urban Utilities, Brisbane City Council, Queensland Rail, Energex, Translink, and Comdain Infrastructure to deliver the project.