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Civil Engineering heritage: Scotland - Lowlands and Borders
Date 2007
Event ID 606502
Category Descriptive Accounts
Type Publication Account
Permalink http://canmore.org.uk/event/606502
From the Clunie dam (NN86SE 66), water is led to Clunie generating station through a two-mile long tunnel, horseshoe shaped in cross-section, with an equivalent diameter of 23 ft. A vivid impression of the size of the tunnel, the largest tunnel in Britain at the time, is given by the memorial arch of the same section above the power station. Approximately 400 000 tons of rock had to be excavated in its construction. The contractor was Cementation Co. Ltd.
From its outlet the main tunnel trifurcates, in steel, into branches each 1212 ft in diameter serving the three turbines. This remarkable trifurcation, now covered over, was made in the workshops of Sir Wm. Arrol & Co. The turbines are of 20.4MW capacity, each operating on a maximum head of 173 ft.
R Paxton and J Shipway
Reproduced from 'Civil Engineering heritage: Scotland - Lowlands and Borders' with kind permission of Thomas Telford Publishers.
