Tarbert & Ardrishaig Magnetic Ion Exchange (MIEX) Water treatment Works

Groundwork began in summer 2020 on the Tarbert treatment works with bulk earth work and rock-break out to achieve the desired formation level. This was more than 5m of rock at the deepest points of the excavation.

Water for the Tarbert treatment works is supplied by Loch a’ Chaorainn and serves around 3,000 people.

Drainage work included installing new storm water drainage systems, ductile iron pipework, and a specialised high strength pipe for a brine discharge outlet down to West Loch by the B8024.

Structurally, temporary works design was required to install a reinforced concrete base with a 150mm kicker, which was installed on top of high strength blinding concrete. With the kicker formed we were then able to progress onto the interconnected retaining wall on the West elevation to allow the higher levels required externally to be achieved here. Service penetrations were installed through the concrete slab at floor level prior to the pours taking place and core holes were then also installed in the walls following the concrete pours.

The super-structure was built atop the reinforced slabs and walls, with structural bolts cast into both, allowing the steel to be landed.

Hard and soft landscaping was also completed around both treatment works. Kerbs, precast steps, gravel and topsoil were put in place around both treatment works in addition to the redi-rock retaining wall.

Road formation and surfacing was also carried out in addition to concrete footpaths around both buildings.

Despite the projects being met with various weather and design setbacks. McFadyen’s Contractors managed to complete the projects on time and within budget.