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Aerial view of Drumaroad Water Treatment Works

Drumaroad Clear Water Tank

The design, construction, commissioning, and testing of a new clear water storage facility. Drumaroad Water Treatment Works (WTW) is designed to deliver 155ML/day of drinking water and can serve over 500,000 people.

As part of a £13m investment to modernise the existing water infrastructure to ensure the security of supply and resilience to the water distribution network, a new 35.7 ML clear water basin (CWB) has been constructed on land adjacent to Drumaroad WTW.

Project name

Client

Northern Ireland Water

Location

Northern Ireland

Services provided:

- Project management

Challenge

Drumaroad WTW typically produces on average 100ML of potable water per day for the supply of the distribution network, with a design capacity to provide up to 155ML per day. Treated water exits the site via two pumped mains, which are individually flow controlled and metered. There was no existing storage at Drumaroad WTW, meaning all treated water had to be immediately pumped off site, offering no resilience or flexibility for NI Water.

The findings of a report carried out in 2013 on behalf of NI Water, ranked the potable water storage facilities at Drumaroad as one of the highest risks across all Northern Ireland Service Reservoirs (SR) and CWBs in terms of low storage retention times. The report identified the need for a suitably sized reservoir within the Drumaroad Supply Zone. Without a suitable storage facility there was a high risk that NI Water customers could suffer water shortages under certain network situations.

Solution

Our team developed a business case and provided a recommendation to address the low storage retention times within the Drumaroad Supply Zone.

Following an optioneering exercise, the approved business case concluded with the recommendation to construct a new 35.7ML clear water basin on land adjacent to the existing WTW which NI Water already owned. The new CWB would increase the existing storage capacity and provide security of supply to the potable water distribution network, meeting business case objectives and offering a cost-effective solution.