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Thames flood control barrier
The metal-clad cupolas and yellow-painted lifting gear of the Thames Flood Barrier, Woolwich, London. Officially opened in 1984, the project took 8 years to complete and cost nearly #500 million. The barrier consists of 10 moveable D- shaped gates supported by 9 concrete piers, each containing the hydraulic machinery which lifts the gates into position. When not in use the gates rest in concrete sills on the bed of the river, causing no hindrance to river traffic.
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