The Dunbar TWS project was to provide increased treated water storage capacity to provide greater security of supply and also to accommodate increased demand from development in the area.
The works incorporated the demolition of the redundant old tank and the construction of a new, 30m x 30m x 5m high twin-cell, reinforced concrete structure with 450mm thick walls and circular support supporting column, and ancillary chambers for control valves, instrumentation, and process dosing. A new access road, footpaths, plinths and ducting completed the work-scope.
The work was undertaken in a small confined area, where excavated material was stockpiled and retained on site for final backfill & reinstatement, and with the essential craneage accommodated within the footprint of the new structure, necessitating carefully programmed sequencing.
The work was effectively on-line construction with water-into-supply from the adjacent water storage structure, which was in poor condition, being maintained throughout and with the extensive pipework installed and flows transferred, on the live network with complex DOMS compliance requirements.
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
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
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