George Leslie Ltd

Key Facts

  • Client: Scottish Water
  • Engineer: Jacobs
  • Conditions of contract: NEC 3 Option A
  • Contract value: £2,300,000
  • Duration of works: January 2013 - April 2014

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Water Supply & Pipeline Work

Talla Aqueduct Refurbishment

Talla Reservoir is one of the primary sources of water to serve the Greater Edinburgh area. Constructed around the turn of the 20th century, Talla Aqueduct conveys raw water by gravity to the water treatment works on the outskirts of Edinburgh primarily in tunnel but it also has numerous siphons and bridges over its the 45km length. This project was to undertake essential refurbishment on critical areas of this strategic asset to maintain security of supply.

The main work elements comprised:

  • Structural repairs to 18 pipe-bridges
  • Protective coating applications to exposed pipelines syphons
  • Scour protection and erosion repair works
  • Refurbishment of valves
  • Chamber security fencing installation

The project’s biggest challenge involved the logistics of the operations which required extensive, third-party consultation and liaison, with landowners including the forestry Commission, SEPA (over methodology and CAR licences), obtaining consents over protected species (badgers and the like) and working  in ancient woodlands and adjacent to listed Ancient Monuments.

Much of the work was undertaken in remote areas, with challenging access during the worst of winter weather conditions.

With much of the work requiring short-term close-downs and isolations, close liaison and cooperative working relationships with operational personnel were essential features of the successful completion of the project.

News updates


The overall project involves the off-site fabrication and installation of a new linkspan structure at Oban Ferry Terminal for client Caledonian Maritime Assets Ltd (CMal).

12th February 2019

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GL return to the Sound of Kerrera

GL making a return visit to the Sound of Kerrera off Oban, to undertake substantial repairs to the breakwater which suffered collision damage following an altercation with a workboat earlier this year.

14th December 2018

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Polmadie Bridge official opening……..

Michael Matheson MSP and Cabinet Secretary for Transport, Infrastructure and Connectivity covered all his portfolios at the official opening of the new Polmadie Footbridge giving pedestrian and cycle transport access,

18th September 2018

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George Leslie Ltd, Blackbyres Road, Barrhead, Glasgow, G78 1DU  |  |  +44 (0)141 881 9131