Project Outline Murphy completed the Design, Build and Operate contract of the Stillorgan Reservoir Upgrade Project on behalf of Irish Water, replacing the existing open reservoirs, with a new covered reservoir. More than 200,000 people in Ireland are now benefiting from a safer and more secure water supply following commissioning of the new Stillorgan reservoir in September 2021. The Stillorgan Reservoir site has a total plan area of approximately 16 hectares and was subdivided into three discrete water storage reservoirs, the Gray, Upper and Lower Reservoirs. The Lower and Upper reservoirs were constructed first, as part of the Vartry Water Supply Scheme. The Gray Reservoir was built in 1885 following a period of severe water shortage in Dublin City. The reservoirs originally contained water from the Vartry Supply Scheme alone; however, following construction of the Liffey Supply Scheme at Ballymore Eustace in the 1940s, a 24” main was laid between Saggart Reservoir and Stillorgan Reservoir to link the two supplies. An additional 1000mm diameter trunk main linking the supplies was constructed on a phased basis during the 1990s. The Stillorgan Reservoir project removed the open storage that was in operation and replace it with a covered reservoir of 160ML storage capacity. This will ensure a long-term, secure and sustainable water supply to the region, meeting current and future regulatory requirements. KEY FACTS Murphy completed the Design, Build and Operate contract Covered reservoir of 160ML storage capacity More than 200,000 Dubliners are benefiting from a safer and more secure water
