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Message: <blockquote data-quote="djjaya" data-source="post: 16653617" data-attributes="member: 461202">The Thames Barrier is located downstream of central London, on the river  Thames on the eastern side of the capital at Woolwich. It is the  world's second largest after the Oosterscheldekering barrier  in the Netherlands. The barrier was built in 1982 to prevent folding of  all but the easternmost boroughs of Greater London by exceptionally  high tides and storm surges moving up from the North Sea. The barrier is  made up of 9 steel gates reaching 520m across the river. When open, the  gates lie flat on the river floor allowing the Thames to flow freely  and ships to pass through the gates. When closed, the gates are rotated  upwards until they block the river. The gates, which are hollow and made  of 1.6 inch-thick steel, span 61 meters and each weigh 3,200 tonnes.  The gates are filled with water when submerged and empty as they emerge  from the river.<img src="http://lh5.ggpht.com/-kJ-u1h8Oc4g/U3DtPHRAHvI/AAAAAAAAyOA/cOLafB65zJA/thames-barrier-6%25255B6%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" />Construction on the Thames Barrier began in 1974 and was officially  opened a decade later. The barrier was originally designed to last up to  the year 2030, but recent analysis suggests that barrier will be  sufficient protection until 2060-70.<img src="http://lh5.ggpht.com/-v5Jnlbm-Mfw/U3DtSeh3UpI/AAAAAAAAyOI/1NS4UxNNBng/thames-barrier-7%25255B6%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://lh5.ggpht.com/-8s-TLRBO1qw/U3DtVBpQCrI/AAAAAAAAyOQ/U70MDaw_x9c/thamesBarrier-working-1%25255B2%25255D.png?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://lh6.ggpht.com/-olGi-U8WgJ4/U3DtXbyQ4bI/AAAAAAAAyOY/2jaBjTy8ezI/thamesBarrier-working-2%25255B3%25255D.png?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://lh6.ggpht.com/-2V1jyEo7Tfs/U3DtZgTXb9I/AAAAAAAAyOg/5YzKCsGocB8/thames_barrier_sequence%25255B5%25255D.gif?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://lh4.ggpht.com/-B5qpxaldaAI/U3DtcNCn-rI/AAAAAAAAyOo/xM5FBc_nNJg/thames-barrier-2%25255B2%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://lh6.ggpht.com/-mfIaH0d0w88/U3Dtfsofa3I/AAAAAAAAyOw/C2Wp6r9e-ek/thames-barrier-3%25255B2%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://lh3.ggpht.com/-_egFV2oNc3Q/U3Dti7Gf0wI/AAAAAAAAyO4/3YILHout_sM/thames-barrier-5%25255B2%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://lh4.ggpht.com/-HRhtrXV9K28/U3DtlZjCOSI/AAAAAAAAyPA/i5W4KR9gX0Y/thames-barrier-8%25255B2%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://lh5.ggpht.com/-dI870DbgM5w/U3DtnrbOYkI/AAAAAAAAyPI/8m_XqfmdpIk/thames-barrier-9%25255B2%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://lh6.ggpht.com/-vJIR701IJMg/U3DtqbDIRdI/AAAAAAAAyPQ/JONEooUzNX0/thames-barrier-4%25255B6%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /></blockquote>

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