Work will start on 9 May, and the majority of it, which will take around 20 weeks to be completed, will be carried out in fields.
Welsh Water North West distribution manager Jim Grundy said: “We have had some bursts in the past on the water main in the area which on occasions has unfortunately affected the nearby allotments. As a result, we are investing over £1 million in the main which will improve the reliability of the network and ensure customers continue to receive a high quality supply of water.
“The location of the main is quite challenging and will mean that we will use three different techniques to replace it. Using these techniques will not only make sure that disruption will be kept to a minimum but also allow us to work in very hard and rocky ground near the reservoir on Holyhead mountain.”
One of these techniques includes slip lining, where the new main is inserted into the old one. This technique will be used on Plas Road near homes and where the allotments are as it’s quieter and quicker and will keep disruption to residents to an absolute minimum. It will also mean that we do not need to dig a trench the allotments.
The work at Holyhead will be carried out by the water firm’s contractors Morrison Utility.
Local councillor Trefor Lloyd Hughes said: “I’m pleased to see that Welsh Water undertaking this work in Holyhead. Following the last burst near the allotments they assured local residents they would carry out improvements and it’s great to see this happening and putting customers first.
Welsh Water serves most of Wales, Deeside and Herefordshire. It is the sixth largest water and sewerage company in England and Wales and, unlike other water companies, it does not have any shareholders.
As part of its £26 billion network of assets, the company operates and maintains 27,500 kilometres of water mains, more than 30,000 kilometres of sewers, 838 sewage treatment works and 66 impounding reservoirs.