Project Alpha, Coleraine

Project Alpha was the first UK PPP for potable water supply.

Contract Value
18 Months
Project Duration

NI Water

The Project

Northern Ireland Water Limited appointed Dalriada Water Limited, a partnership between Yorkshire Water, AECOM (formerly Earthtech Engineering) and Farrans Construction to design, build, finance and operate four existing water treatment works for a period of 25 years.

Services & Expertise

Upgrade of these treatment works, which produce 45% of Northern Ireland’s potable water, involved a capital investment of £110m over a two-year construction phase.

As a significant design innovation by Farrans, who value engineered the client requirements of Project Alpha, a fifth new build Water Treatment Works (Forked Bridge WTW’s) was eliminated and instead the supply volume was fulfilled by constructing a new cross-country pipeline from Castor Bay WTW’s to Forked Bridge WTW’s.

The pipeline totalled 16km of 600mm diameter ductile iron pumping mains and was laid in fields, highways and private lands.

Two strategic link mains from Coleraine to Limavady and Ballymoney (44km) have been included within the scope of the scheme which was designed, built and financed by Dalriada Water Limited, and then handed over to NIWL.

Total value for pipelines was approximately £19m.