Project Overview

We're investing around £6.8 million in Carstairs, South Lanarkshire, constructing a new waste water treatment works.

The new works is needed due to the increased population in the Carstairs area.

The project is being delivered by our alliance partner, Efficient Service Delivery (ESD), and is expected to take around 12 months for completion.

Carstairs site

New Waste Water Treatment Works

A computer generated image of the new waste water treatment works planned for Carstairs, South Lanarkshire.

Why We Are Doing This

These works are required as the existing treatment works at Carstairs can no longer cope with the increased population in the area.

What We Are Doing

The worked involves the construction of a new waste water treatment works (WWTW) for both primary and secondary treatment of waste water. Once the new works have been built the existing treatment works will be demolished.

Our first task was to prepare the groundworks so that construction activities can commence.  This preparatory works finished in February 2021.

On completion of the groundworks, the next phase will involve the installation of 120 concrete driven piles so that concrete bases for some of the structures can be completed.

From March 2021 the settlement tanks will be constructed below ground.  This is the main bulk of the work required here at Carstairs and took roughly five months to complete. 


Carstairs site
Carstairs site
Carstairs site

Work Site, Carstairs

A few pics of our work site at Carstairs.

Update November 2021

Good progress has been made on site over the last year and the project is now on target to complete the construction of the primary settlement tanks shafts and humus tank shaft, bringing that phase of the project to a close.

This is a key milestone, it brings the major below ground works to an end and allows the site to move onto the construction of the reinforced concrete slabs for the above ground elements of the new works.

The upgrades to the existing works, pipework and ducting to link the new system together and reconnect it with the existing works.

Carstairs Shaft

Carstairs Site Area