George Leslie Ltd

Key Facts

  • Client: Scottish Water
  • Engineer: MWH
  • Conditions of contract: NEC3 Option C
  • Contract value: £913,000
  • Duration of works: April 2015 - Sept 2015

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Wastewater Pipelines, Tunnels & Shafts

Shieldhall 1 UIDs – Margaretta Buildings CSO

The Margaretta sewer overflow spilled unsatisfactory discharges into the White Cart Water in Cathcart and this project was to construct a new attenuation storage shaft with box-culvert overflow, incorporating a powered screen, headwall and upgrading work on the upstream sewer network.

The main work elements were: –

  • A 6m diam x 6m deep pc shaft CSO built on top of the existing egg-shaped brick sewer
  • Piled cofferdam for constructing the 2.1m x1.5m pc box-culvert outfall and 4m high, pc headwall
  • Giant Hogweed removal and re-siting of otter holt
  • Replacement 45m x 750mm diam, 6m deep sewer together with 5 new 1500mm diam, 6m deep manholes in Clarkston Rd
  • Pre-planted coir matting reinstatement to promote rapid recovery

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