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Thames Barrier

Volume 453: debated on Monday 27 November 2006

To ask the Secretary of State for Environment, Food and Rural Affairs what high tide level was recorded on each occasion on which the Thames Barrier has been closed. (102732)

[holding answer 23 November 2006]: The Thames Barrier and Associated Tidal Defences criteria to operate are based on two factors:

the forecast tide level at Southend, and

the river flow over Teddington Weir in west London.

If the combination of these would cause the overtopping of the walls and embankments in the centre of London then the defences are operated.

A list of the high tides at Southend on each occasion when the Thames Barrier has been closed has been placed in the Library of the House.