Scottish Water has welcomed the progress being made on a £20 million project in Edinburgh to make the drinking water network more resilient, which is more than a third complete.

The utility company has installed just over 4 km – out of total 12 km – of brand new mains in the southern part of the city which supplies much of Edinburgh and parts of West Lothian.

The investment will allow customers to be supplied from two different locations – Glencorse and Marchbank Water Treatment Works - making it less likely that they are left without water.

The extended network will also have the capacity to link to other existing and future water supplies across parts of the south of Scotland. It will ensure Scottish Water can provide its customers in Scotland's capital city, including a growing number of households and businesses, supplied with fresh water around the clock.

The network expansion across part of the Pentland Hills – some of it visible from the city bypass and the A702 near Hillend – and has included working in areas where World War One training trenches were constructed. Work is also being carried out in part of the Swanston Conservation Area where any work taking place in April and July must requires extra care and consideration due to lambing season and ground nesting birds.


There are a number of burns and streams which run nearby the planned route and all the work being carried out in these areas will take account of salmon spawning season, which Scottish Water continues to liaise with SEPA about.

Within the Pentland Hills Regional Park, Dreghorn Woods has been designated by Woodland Trust Scotland as a First World War Centenary Wood. The park must be kept open to the public at all times during construction and measures have been taken to allow the public continued access to the park.

The work includes single and twin pipes – all of which are bright blue and visible on areas of land across the area - being laid to connect Marchbank Water Treatment Works near Balerno and Glencorse Water Treatment Works, south of the city.

It is hoped the pipework will be completed by the end of summer after which the area will be reinstated with the work due to be completed by the end of the year.

One of the biggest challenges for the team on the ground has been working under the High Voltage Powerlines which cross and follow much of the route of the pipeline. As a result of this CWA arranged overhead cable posts to be setup along the working area as required and height restrictors were also fitted to machinery used on site to minimise the risk of any overhead cable strikes while construction works are underway. 

Project Manager James Kerr, of CWA, said: "We are making good progress with pipe laying activities and are working closely with people who live, work or visit the areas where we are working and make every effort to cause as little disruption as possible. We also recognise that this project comprises a significant investment in the ongoing strategic objectives developed by Scottish Water to provide security of supply to customers both locally and further afield.

"One example of this is how many walkers in the area have been interacting with teams on site and have said they are pleased the work has not restricted their activities due to the amount of crossing points we have put in alongside the pipeline."

(MH)