Current proposals for the Thames barrier and the organization of the investigations
A considerable area of London close to the River Thames is liable to flood if the water in the river reaches an exceptionally high level. The very high waters which occur from time to time due to exceptional meteorological conditions are steadily increasing in level. After considering the possible ways of meeting this threat, by raising the existing flood defences, constructing a barrage across the mouth of the estuary, or the provision of a removeable flood barrier, to be closed only when a dangerous surge tide was liable to occur, the third course has been chosen as the best method. A site in Woolwich Reach has been chosen for a structure with four main openings of 61 m (200 ft), and the rising sectorf gate has been selected as the type of gate to be developed for the main openings.