Boyle Water Supply Scheme extension

Irish Water is investing €2.4 million to extend the Boyle Water Supply Scheme to Grangemore which will improve water quality and security of supply to customers. Grangemore is currently served by the existing Cavetown Water Treatment Plant which is listed on the EPA’s Remedial Action List for Trihalomethane exceedances. It has also been subject to a boil water notice in the past.

This extension will lead to the decommissioning of the Cavetown Water Treatment Plant. Once the project is complete customers in Grangemore will receive their water from the Boyle Water Supply.

What does the project involve?

This project, which is scheduled for completion in December 2019 involves the construction of a pumping station at the Carrickmore reservoir, the laying of 4.7km of rising mains and inter-connecting water mains to extend the Boyle Water Supply Scheme to Grangemore. The existing Cavetown Water Treatment Plant will also be decommissioned as part of these works.

Working in partnership with Roscommon County Council, Source Civil Limited has been appointed to carry out the project. Works are due to commence on site in the coming weeks.

Irish Water’s investment plan

This project forms part of Irish Water’s investment plan. Works have been prioritised to address the most critical issues in line with commitments outlined in Irish Water’s Business Plan. Delivery of the business plan will involve a €5.5 billion investment in capital spending on drinking water and wastewater quality and capacity and new infrastructure up to 2021. 

More information 

For more information on the benefits of this project, visit the Boyle Water Supply Scheme project page. 


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