What the Clyde Dam work entailed

In awarding the contract for construction of the Clyde Dam to the Zublin-Williamson joint venture, the Government detailed the following  contract works:

• Construction of the concrete dam and spillway. The dam was to have a crest height above the existing water level of around 60 metres, a crest length of nearly 500 metres, and would contain 800,000 cubic metres of concrete, 650,000 cubic metres of which would be placed by the contractor.
• Preparation and consolidation grouting of the foundation of the left abutment, and the central part of the dam and spillway.
• Curtain grouting and drilling of relief drains.
• Fabrication, erection and painting of steel penstocks for four generating sets, and concrete-encased steel for the other two sets, involving about 1350 tonnes of steel.
• Painting and installation of gates, screens and bulkheads, including frames and lifting equipment.
• Production of concrete aggregate.

The Government said the Ministry of Works would provide two 12.5 tonne cableways, a concrete batching plant with four, three-cubic-metre batching units and two tower cranes.

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Contractor Vol.32  No.9  October 2008
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