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These are the user uploaded subtitles that are being translated: 1 00:00:01,120 --> 00:00:02,410 The picturesque lagoon 2 00:00:02,410 --> 00:00:05,940 on which the iconic city of Venice was built 3 00:00:05,940 --> 00:00:09,580 has always been this form of maritime powers lifeline, 4 00:00:09,580 --> 00:00:12,550 offering crucial protection from the mainland 5 00:00:12,550 --> 00:00:14,563 and easy access to the sea. 6 00:00:15,800 --> 00:00:18,910 But the very waters that were its historical ally 7 00:00:18,910 --> 00:00:21,970 also became Venice's greatest enemy 8 00:00:21,970 --> 00:00:25,453 with recurrent flooding across the vast tracks of the city. 9 00:00:26,430 --> 00:00:29,590 In a marvel of modern naval engineering 10 00:00:29,590 --> 00:00:32,990 and heavy lift technology, the Italian government 11 00:00:32,990 --> 00:00:36,110 under consortium of private enterprises 12 00:00:36,110 --> 00:00:41,110 is building a 7.3 billion Euro water barrier system 13 00:00:41,390 --> 00:00:45,090 to safeguard this romantic city of water 14 00:00:45,090 --> 00:00:46,833 for future generations. 15 00:00:47,838 --> 00:00:50,421 (upbeat music) 16 00:01:00,657 --> 00:01:03,407 (water sloshing) 17 00:01:05,920 --> 00:01:08,700 The streets of Venice flood, 18 00:01:08,700 --> 00:01:12,090 a phenomenon known here as acqua alta, 19 00:01:12,090 --> 00:01:14,870 when strong southeasterly winds 20 00:01:14,870 --> 00:01:17,540 and a high astronomical tide 21 00:01:17,540 --> 00:01:22,013 calls an unusual inflow of water into the Venetian Lagoon. 22 00:01:23,080 --> 00:01:28,080 Exceptional tides measured here at Punta della Dogana 23 00:01:28,110 --> 00:01:31,600 have occurred more frequently over the last century 24 00:01:31,600 --> 00:01:35,940 and risk catastrophically damaging the whole lagoon 25 00:01:35,940 --> 00:01:37,353 and the city itself. 26 00:01:38,920 --> 00:01:40,890 Venetians have long been accustomed 27 00:01:40,890 --> 00:01:45,550 to coping with the inconvenience of acqua alta. 28 00:01:45,550 --> 00:01:48,850 In 2003, the Italian government 29 00:01:48,850 --> 00:01:52,290 began building an ambitious feat of engineering 30 00:01:52,290 --> 00:01:56,890 to stop the devastating high tides and save the city. 31 00:01:56,890 --> 00:02:01,670 A massive surge barrier with 78 floating gates 32 00:02:01,670 --> 00:02:05,430 to close off the lagoon when flooding occurs. 33 00:02:05,430 --> 00:02:07,760 Let's say it's a problem of preservation 34 00:02:07,760 --> 00:02:09,753 of the city's monumental heritage. 35 00:02:10,990 --> 00:02:13,610 Thanks to exchanges with the environmentalist 36 00:02:13,610 --> 00:02:16,660 and to the improvement of the technologies, 37 00:02:16,660 --> 00:02:18,700 we have created the most important 38 00:02:18,700 --> 00:02:22,800 and probably the greatest environmental initiative 39 00:02:22,800 --> 00:02:23,633 in the world. 40 00:02:25,090 --> 00:02:27,850 You can't just finish part of it and then see if it works. 41 00:02:27,850 --> 00:02:30,800 We're going to have to wait until it's completely finished. 42 00:02:34,280 --> 00:02:35,740 Venice is sinking 43 00:02:35,740 --> 00:02:40,740 due to a two-fold mix of natural and man-made problems. 44 00:02:41,110 --> 00:02:44,700 Climate change has caused the Adriatic to rise. 45 00:02:44,700 --> 00:02:48,920 But Venice also suffers from shifting plate tectonics, 46 00:02:48,920 --> 00:02:53,460 meaning, the ground underneath the city is sinking. 47 00:02:53,460 --> 00:02:55,270 This problem is made worse 48 00:02:55,270 --> 00:02:58,210 by the reckless pumping of groundwater 49 00:02:58,210 --> 00:03:02,552 for use in petrochemical plants nearby. 50 00:03:02,552 --> 00:03:05,052 (soft music) 51 00:03:08,970 --> 00:03:10,500 We estimate that the sea level 52 00:03:10,500 --> 00:03:12,980 has risen by 12 to 13 centimeters. 53 00:03:12,980 --> 00:03:16,960 So the sum of rising sea levels and the thinking soil 54 00:03:16,960 --> 00:03:19,620 totals about 25 centimeters. 55 00:03:19,620 --> 00:03:22,470 So the city of Venice over the course of the last century 56 00:03:22,470 --> 00:03:25,730 has sunk approximately 25 centimeters 57 00:03:25,730 --> 00:03:27,743 with respect to the average sea level. 58 00:03:32,410 --> 00:03:35,180 In 1966, flood levels in the city 59 00:03:35,180 --> 00:03:40,180 reached a record, 1.94 meters, roughly six feet, 60 00:03:40,230 --> 00:03:43,130 causing immense damage to the city's building 61 00:03:43,130 --> 00:03:46,470 and giving birth to the Save Venice movement. 62 00:03:46,470 --> 00:03:49,800 Recognizing the need for a permanent solution, 63 00:03:49,800 --> 00:03:51,630 city authorities hatched a plan 64 00:03:51,630 --> 00:03:55,770 for the separation of the lagoon from the sea at high tide. 65 00:03:55,770 --> 00:03:58,860 The project was baptized, MOSE, 66 00:03:58,860 --> 00:04:01,189 an acronym that stands for 67 00:04:01,189 --> 00:04:04,690 Modulo Elettromeccanico Sperimentale 68 00:04:04,690 --> 00:04:08,373 or Experimental Electromechanical Module. 69 00:04:09,540 --> 00:04:13,170 In 1966, Venice flooded dramatically. 70 00:04:13,170 --> 00:04:15,250 It was the worst flood ever recorded 71 00:04:15,250 --> 00:04:17,570 and lasted longer than ever before, 72 00:04:17,570 --> 00:04:19,100 and so the Italian government 73 00:04:19,100 --> 00:04:22,750 decided that Venice had become a national problem 74 00:04:22,750 --> 00:04:26,600 and that the city had to be saved from the high waters. 75 00:04:26,600 --> 00:04:29,140 So from that moment onwards, 76 00:04:29,140 --> 00:04:33,310 a series of ideas emerged and then projects were launched 77 00:04:33,310 --> 00:04:35,770 that are now being concluded after many years 78 00:04:36,710 --> 00:04:39,670 to create a system that stops the rising waters 79 00:04:39,670 --> 00:04:41,650 outside the Venetian lagoon 80 00:04:41,650 --> 00:04:43,683 protecting the city from flooding. 81 00:04:45,520 --> 00:04:47,940 The MOSE project was all the more ambitious 82 00:04:47,940 --> 00:04:50,870 because of the geography of Venice. 83 00:04:50,870 --> 00:04:54,930 The Venetian lagoon was formed about 6,000 years ago 84 00:04:54,930 --> 00:04:59,010 as the coastal plain shifted following the last ice age. 85 00:04:59,010 --> 00:05:03,770 Today it stretches 550 square kilometers 86 00:05:03,770 --> 00:05:06,080 from the River Sila in the North 87 00:05:06,080 --> 00:05:07,953 to the Brenta in the South. 88 00:05:09,100 --> 00:05:12,200 The city of Venice and the smaller islands around it 89 00:05:12,200 --> 00:05:16,360 all together only account for 8% of the lagoon area, 90 00:05:16,360 --> 00:05:21,360 while 12% is permanently covered by open water and canals, 91 00:05:21,570 --> 00:05:26,570 and 80% is mud-flats, tidal shallows and salt marshes. 92 00:05:27,340 --> 00:05:30,130 In fact, it is one of the Mediterranean basin's 93 00:05:30,130 --> 00:05:32,600 largest wetlands. 94 00:05:32,600 --> 00:05:35,840 The lagoon is connected to the Adriatic sea 95 00:05:35,840 --> 00:05:39,980 by three large openings in the natural sand barrier. 96 00:05:39,980 --> 00:05:42,610 They are the Lido, the Malamocco, 97 00:05:42,610 --> 00:05:44,450 and the Chioggia inlets 98 00:05:44,450 --> 00:05:48,113 where the tide enters and exits twice a day. 99 00:05:49,390 --> 00:05:50,770 The seawater enters the inlets 100 00:05:50,770 --> 00:05:53,654 and spreads gradually into the lagoon. 101 00:05:53,654 --> 00:05:55,830 From the inlets, it spreads along the canals. 102 00:05:55,830 --> 00:05:59,530 It goes faster along canals but also around the sand banks 103 00:05:59,530 --> 00:06:01,240 and the deeper areas. 104 00:06:01,240 --> 00:06:04,217 And when the tide receipts, the sea level goes down, 105 00:06:04,217 --> 00:06:07,473 and the waters flow out of the lagoon inlets once again. 106 00:06:09,840 --> 00:06:11,960 During and after the fall 107 00:06:11,960 --> 00:06:14,500 of the Western Roman Empire, 108 00:06:14,500 --> 00:06:17,630 the inhabitants of the Venetian coastal plain 109 00:06:17,630 --> 00:06:20,280 fled the invading barbarians 110 00:06:20,280 --> 00:06:22,630 and came to live on the dozens of islands 111 00:06:22,630 --> 00:06:24,730 surrounded by the shadow lagoon 112 00:06:24,730 --> 00:06:27,610 for the protection it afforded. 113 00:06:27,610 --> 00:06:30,950 Over the centuries, the lagoon became a natural base 114 00:06:30,950 --> 00:06:34,053 for the great Venetian trading empire. 115 00:06:35,600 --> 00:06:39,920 The Venetians built their city by driving giant oak poles 116 00:06:39,920 --> 00:06:43,310 up to four meters into the muddy flats, 117 00:06:43,310 --> 00:06:47,020 effectively petrifying and preserving them. 118 00:06:47,020 --> 00:06:49,680 They put planks on top of these pillars 119 00:06:49,680 --> 00:06:52,763 and marble foundations on top of the planks. 120 00:06:55,080 --> 00:06:58,670 Over time, the Brenta and Sila rivers 121 00:06:58,670 --> 00:07:03,040 deposited in the lagoon blocking the navigation channels, 122 00:07:03,040 --> 00:07:07,090 and Venetians found it necessary to redirect the rivers 123 00:07:07,090 --> 00:07:09,800 so they flow directly into the sea 124 00:07:09,800 --> 00:07:11,743 instead of into the lagoon. 125 00:07:13,490 --> 00:07:16,610 Large-scale naval engineering projects 126 00:07:16,610 --> 00:07:20,740 including hydraulic pumping and the redirection of rivers 127 00:07:20,740 --> 00:07:23,230 have been underway for centuries 128 00:07:23,230 --> 00:07:26,540 and have altered the natural evolution of the lagoon, 129 00:07:26,540 --> 00:07:30,303 creating canals and a number of artificial islands. 130 00:07:31,330 --> 00:07:34,000 Battling high and low water 131 00:07:34,000 --> 00:07:37,253 has been a part of Venetian life for hundreds of years. 132 00:07:38,260 --> 00:07:42,060 The MOSE project, however, is the most complex 133 00:07:42,060 --> 00:07:46,333 and massive naval engineering project in the city's history. 134 00:07:50,870 --> 00:07:53,660 The idea that Venice could be protected from the sea 135 00:07:53,660 --> 00:07:58,303 by a series of barriers began to gain traction in the 1970s. 136 00:07:59,320 --> 00:08:03,500 Other surge barriers in London, Saint Petersburg, Russia, 137 00:08:03,500 --> 00:08:05,510 and Rotterdam in the Netherlands 138 00:08:05,510 --> 00:08:07,890 show that the concept could work, 139 00:08:07,890 --> 00:08:10,510 but actually building it in Italy 140 00:08:10,510 --> 00:08:13,313 proved far more complicated than expected. 141 00:08:14,160 --> 00:08:18,070 Like all costly big engineering projects in Italy, 142 00:08:18,070 --> 00:08:21,930 it encountered strong opposition from environmentalists, 143 00:08:21,930 --> 00:08:24,440 became vulnerable to corruption 144 00:08:24,440 --> 00:08:28,000 and fell into a web of contradictory local 145 00:08:28,000 --> 00:08:29,473 and national powers. 146 00:08:30,880 --> 00:08:33,650 When the project was first designed 30 years ago, 147 00:08:33,650 --> 00:08:36,930 it was essentially an engineering project, 148 00:08:36,930 --> 00:08:39,020 and so we approached the problem 149 00:08:39,020 --> 00:08:41,950 in a very, let's say, hard way. 150 00:08:41,950 --> 00:08:44,770 Today there are two sides to the project: 151 00:08:44,770 --> 00:08:48,613 The engineering side, but also the environmental side. 152 00:08:50,080 --> 00:08:52,210 Construction of the Venetian MOSE 153 00:08:52,210 --> 00:08:54,630 began in 2003. 154 00:08:54,630 --> 00:08:57,500 And the surge barrier is expected to be complete 155 00:08:57,500 --> 00:09:00,573 and fully functional in 2018. 156 00:09:01,860 --> 00:09:05,240 The MOSE project was tailor-made to protect Venice 157 00:09:05,240 --> 00:09:07,960 with four major barriers installed 158 00:09:07,960 --> 00:09:10,910 at the three main lagoon inlets 159 00:09:10,910 --> 00:09:14,260 that connect the lagoon to the Adriatic sea. 160 00:09:14,260 --> 00:09:15,650 The Venice surge barrier 161 00:09:15,650 --> 00:09:19,700 consists of the 78 floating steel flood gates 162 00:09:19,700 --> 00:09:22,920 arranged into four rows of various sizes, 163 00:09:22,920 --> 00:09:24,683 widths and lengths. 164 00:09:25,610 --> 00:09:28,360 They are all independently operated 165 00:09:28,360 --> 00:09:32,680 and housed in tanks anchored to the sea floor. 166 00:09:32,680 --> 00:09:37,520 Each gate lies horizontally on the sea bed when not in use. 167 00:09:37,520 --> 00:09:42,340 But when the tides over 110 centimeters are predicted, 168 00:09:42,340 --> 00:09:45,233 the barriers rise up on their hinges. 169 00:09:46,070 --> 00:09:48,020 After the threat passes, 170 00:09:48,020 --> 00:09:51,873 the air is released and the barriers can sink down again. 171 00:09:56,530 --> 00:09:59,210 The flotation forces do most of the work, 172 00:09:59,210 --> 00:10:00,480 think of them as buoyance, 173 00:10:00,480 --> 00:10:03,330 which are submerged except for the last part. 174 00:10:03,330 --> 00:10:05,650 So they are controlled with pressurized air 175 00:10:05,650 --> 00:10:09,700 inside the barrier and absorb the force of the wave, 176 00:10:09,700 --> 00:10:12,873 but the air inside the barrier compensates for it. 177 00:10:23,840 --> 00:10:26,310 Over time, the MOSE project 178 00:10:26,310 --> 00:10:29,660 morphed from being a purely engineering project 179 00:10:29,660 --> 00:10:32,630 to encompass also the recovery of lagoon wetlands 180 00:10:32,630 --> 00:10:35,760 that had been eroded over the centuries 181 00:10:35,760 --> 00:10:39,640 and the recovery and restoration of Venice's ancient Arsenal 182 00:10:39,640 --> 00:10:42,880 which became the control center of the whole project 183 00:10:42,880 --> 00:10:47,530 now run by the construction Consorzio Venezia Nuova 184 00:10:47,530 --> 00:10:49,183 or New Venice. 185 00:10:51,510 --> 00:10:53,640 The work we have done over the last few years 186 00:10:53,640 --> 00:10:54,980 has been varied: 187 00:10:54,980 --> 00:10:58,710 Land recovery, reinforcement of the coastline, 188 00:10:58,710 --> 00:11:02,440 decontamination, protection of polluted areas, 189 00:11:02,440 --> 00:11:05,980 all this to regenerate and improve the lagoon 190 00:11:05,980 --> 00:11:10,033 and the quality of its water. 191 00:11:12,680 --> 00:11:13,513 Over the course 192 00:11:13,513 --> 00:11:16,800 of a 15-year infrastructure project, 193 00:11:16,800 --> 00:11:20,750 the work has often been bogged down by political quagmires 194 00:11:20,750 --> 00:11:22,890 and kickback scandals. 195 00:11:22,890 --> 00:11:26,010 One of the most vocal opponents of the MOSE project 196 00:11:26,010 --> 00:11:31,010 is Luigi Lazzaro of Legambiente. 197 00:11:32,910 --> 00:11:34,860 This model, this Italian style 198 00:11:34,860 --> 00:11:37,690 of managing the bids and sub-bids in-house 199 00:11:37,690 --> 00:11:39,890 that determine who gets the project 200 00:11:39,890 --> 00:11:42,430 and then inflating the costs year after year 201 00:11:42,430 --> 00:11:46,200 is a direct result of the new public works law. 202 00:11:46,200 --> 00:11:48,900 Now we're up to 7 billion euros 203 00:11:48,900 --> 00:11:52,800 with the MOSE maybe being completed in 2016, 204 00:11:52,800 --> 00:11:57,800 then we'll see how much money it will cost in the future. 205 00:11:58,907 --> 00:12:01,090 It is one of the most complex 206 00:12:01,090 --> 00:12:04,943 and costly public works projects in Italian history. 207 00:12:09,480 --> 00:12:11,030 The budget of the construction 208 00:12:11,030 --> 00:12:14,490 is approximately 5.5 billion euros 209 00:12:14,490 --> 00:12:18,580 spent over 10 to 15 years for construction. 210 00:12:18,580 --> 00:12:20,350 In general terms, 211 00:12:20,350 --> 00:12:24,867 we think maintenance will be 30 to 40 million euros a year. 212 00:12:29,770 --> 00:12:31,980 But it is the MOSE surge barrier 213 00:12:31,980 --> 00:12:35,100 that is at the heart of this massive new effort 214 00:12:35,100 --> 00:12:36,473 to protect the Venice. 215 00:12:37,380 --> 00:12:39,280 The heavy lift company, Fagioli, 216 00:12:39,280 --> 00:12:42,420 was called in to move some of the key elements 217 00:12:42,420 --> 00:12:45,670 of this massive engineering operation 218 00:12:45,670 --> 00:12:49,040 together with construction company, Mantovani, 219 00:12:49,040 --> 00:12:51,040 the Venice Water Authority 220 00:12:51,040 --> 00:12:55,480 and the privately owned consortium, Venezia Nuova. 221 00:12:55,480 --> 00:12:58,490 After centuries of devastating floods, 222 00:12:58,490 --> 00:13:01,410 a plan to save Venice from the rising sea 223 00:13:01,410 --> 00:13:05,290 and the sinking city finally surfaced. 224 00:13:05,290 --> 00:13:08,820 Each of the 12,000 ton concrete housings 225 00:13:08,820 --> 00:13:10,960 had to be moved from the building site 226 00:13:10,960 --> 00:13:12,383 to the lagoon entrance. 227 00:13:13,390 --> 00:13:16,160 While the Lido and Chioggia barrier housings 228 00:13:16,160 --> 00:13:19,460 were built close to their final destination site, 229 00:13:19,460 --> 00:13:22,460 the casings for the Malamocco lagoon entrance 230 00:13:22,460 --> 00:13:25,283 were built far from where they were to be laid. 231 00:13:26,330 --> 00:13:29,600 Moving the concrete barrier housings from the building site 232 00:13:29,600 --> 00:13:32,380 to their designated place on the sea floor 233 00:13:32,380 --> 00:13:35,600 and then installing the mobile barriers 234 00:13:35,600 --> 00:13:37,493 was an Epic lifting job. 235 00:13:38,580 --> 00:13:42,220 Fagioli first had to deliver a lifting structure 236 00:13:42,220 --> 00:13:43,860 that would allow the casings built 237 00:13:43,860 --> 00:13:47,890 for the Malamocco entrance to be lowered into the water 238 00:13:47,890 --> 00:13:50,953 as the site could not be flooded like the others. 239 00:13:52,740 --> 00:13:54,690 In order to sync the casings here, 240 00:13:54,690 --> 00:13:58,860 the consortium built the largest synchrolift in the world, 241 00:13:58,860 --> 00:14:03,860 made up of 26 beams, each 57 meters long, 242 00:14:03,890 --> 00:14:05,970 activated by hydraulic winches 243 00:14:05,970 --> 00:14:08,610 that could lower the casings underwater 244 00:14:08,610 --> 00:14:12,913 so that they could in turn be lifted and transported. 245 00:14:13,870 --> 00:14:16,690 The synchrolift is a synchronized elevator 246 00:14:16,690 --> 00:14:18,963 that allows us to lower things in water, 247 00:14:19,820 --> 00:14:22,540 structures that aren't only very large in size, 248 00:14:22,540 --> 00:14:25,070 but above all, extremely heavy. 249 00:14:25,070 --> 00:14:27,523 And with this lift, we can carry caissons, 250 00:14:27,523 --> 00:14:30,463 they weigh up to 22,000 metric tons. 251 00:14:33,280 --> 00:14:36,000 The massive cross beams of the synchrolift 252 00:14:36,000 --> 00:14:39,420 were transported onto a specially designed barge 253 00:14:39,420 --> 00:14:42,563 using self-propelled modular transporters. 254 00:14:43,410 --> 00:14:45,550 They are equipped with dozens of wheels 255 00:14:45,550 --> 00:14:48,860 that can rotate individually through 90 degrees 256 00:14:48,860 --> 00:14:52,540 in order to move massive weights in any direction. 257 00:14:52,540 --> 00:14:56,140 It took three to carry each of the beams to the barge 258 00:14:56,140 --> 00:14:59,660 where they were loaded and taken to the construction site 259 00:14:59,660 --> 00:15:01,840 where they were laid side-by-side 260 00:15:01,840 --> 00:15:04,840 and attached to the massive hydraulic jacks 261 00:15:04,840 --> 00:15:07,763 that provided the lifting and lowering power. 262 00:15:09,230 --> 00:15:11,060 Fagioli was also contracted 263 00:15:11,060 --> 00:15:13,430 to move some of the concrete caissons 264 00:15:13,430 --> 00:15:15,843 from the Lido-Treporti building site. 265 00:15:16,780 --> 00:15:19,890 In order to move the massive concrete caissons, 266 00:15:19,890 --> 00:15:23,603 Fagioli engineers designed a unique tool for the job. 267 00:15:24,710 --> 00:15:28,530 They designed a catamaran structure with two river barges 268 00:15:28,530 --> 00:15:33,090 bound together with crossbeams equipped with strand jacks. 269 00:15:33,090 --> 00:15:34,870 A special wedged-shaped connection 270 00:15:34,870 --> 00:15:38,030 provided the catamaran with the necessary rigidity 271 00:15:38,030 --> 00:15:40,700 to perform the massive lift. 272 00:15:40,700 --> 00:15:43,970 The unit was designed and built at the Fagioli yards 273 00:15:43,970 --> 00:15:46,110 at Cremona on the Po river 274 00:15:46,110 --> 00:15:48,800 under the direction of Loris Giovannini. 275 00:15:54,460 --> 00:15:56,760 The port of Cremona has been a very important location 276 00:15:56,760 --> 00:15:59,390 for the MOSE project in that it had the shipyard 277 00:15:59,390 --> 00:16:01,810 where the catamaran was preassembled. 278 00:16:01,810 --> 00:16:03,760 The catamaran was constructed 279 00:16:03,760 --> 00:16:06,340 out of two existing river barges 280 00:16:06,340 --> 00:16:08,900 that were taken out of the water in the port of Cremona, 281 00:16:08,900 --> 00:16:11,330 put in the dry dock in order to modify them 282 00:16:11,330 --> 00:16:14,120 and utilize them as the catamaran. 283 00:16:15,191 --> 00:16:16,024 In the port of Cremona, 284 00:16:16,024 --> 00:16:18,270 the two crosshead beams were constructed. 285 00:16:18,270 --> 00:16:20,780 They would constitute the catamaran. 286 00:16:20,780 --> 00:16:22,900 Once assembled in the dry dock, 287 00:16:22,900 --> 00:16:26,980 the whole catamaran was disassembled, and piece by piece, 288 00:16:26,980 --> 00:16:31,473 barges and beams were transported to the Lido-Treporti. 289 00:16:40,820 --> 00:16:43,020 For this heavy lift job, 290 00:16:43,020 --> 00:16:46,920 the catamaran needed a total of 20 strand jacks 291 00:16:46,920 --> 00:16:51,920 able to lift from 45 to 294 tons. 292 00:16:51,970 --> 00:16:54,693 They do the heavy lifting of the concrete caissons. 293 00:17:01,451 --> 00:17:04,259 Four strand jacks were used to sink the caissons. 294 00:17:04,259 --> 00:17:06,590 There were four vertical strand jacks 295 00:17:06,590 --> 00:17:09,503 that let us sink the caissons to the correct depth. 296 00:17:13,820 --> 00:17:16,740 Then we used the 12 L50 strand jacks 297 00:17:16,740 --> 00:17:20,063 with a capacity of 50 tons for the secondary boring. 298 00:17:21,630 --> 00:17:23,903 That connected the caissons to the catamaran. 299 00:17:24,964 --> 00:17:29,964 Then another four L300 strand jacks with a 300 ton capacity 300 00:17:30,250 --> 00:17:32,640 were used for the primary boring system 301 00:17:32,640 --> 00:17:35,040 which allowed the catamaran to move the caisson 302 00:17:35,040 --> 00:17:36,903 to its final resting place. 303 00:17:42,747 --> 00:17:44,810 The single most employed instrument 304 00:17:44,810 --> 00:17:48,250 in all the transportation of the 12,000 ton caissons 305 00:17:48,250 --> 00:17:51,880 of this mega project was the strand jack, 306 00:17:51,880 --> 00:17:55,670 which uses an electrically activated hydraulic pulley 307 00:17:55,670 --> 00:17:57,400 to raise massive weights 308 00:17:57,400 --> 00:18:02,148 spread evenly among the dozens of cables lifting the load. 309 00:18:02,148 --> 00:18:04,648 (soft music) 310 00:18:06,570 --> 00:18:11,570 Strand jacks were famously used to pull the 100,000 tons 311 00:18:11,680 --> 00:18:14,870 of the Costa Concordia over 12 hours 312 00:18:14,870 --> 00:18:17,500 from a 60 degree list to the vertical 313 00:18:17,500 --> 00:18:21,299 in the 2013 parbuckling operation. 314 00:18:21,299 --> 00:18:23,799 (soft music) 315 00:18:26,010 --> 00:18:31,010 In July of 2012, one of the massive concrete caissons 316 00:18:31,130 --> 00:18:33,590 on which the individual floating barriers 317 00:18:33,590 --> 00:18:37,260 were to be attached was ready to be moved. 318 00:18:37,260 --> 00:18:39,820 Once ready, the basin was flooded 319 00:18:39,820 --> 00:18:41,870 and the caisson started floating 320 00:18:41,870 --> 00:18:44,200 but then had to be partially sunk 321 00:18:44,200 --> 00:18:48,610 by pumping the air out of the tunnels built inside them. 322 00:18:48,610 --> 00:18:52,210 Two tugboats dragged the caissons one at a time 323 00:18:52,210 --> 00:18:55,023 out of the basin to a sheltered area. 324 00:18:55,928 --> 00:18:58,570 (soft music) 325 00:18:58,570 --> 00:19:00,640 Though the caissons were secure, 326 00:19:00,640 --> 00:19:02,540 every safety precaution was taken 327 00:19:02,540 --> 00:19:04,553 to make sure nothing went wrong. 328 00:19:05,540 --> 00:19:07,710 Special propylene axle lines 329 00:19:07,710 --> 00:19:10,940 were fixed to the special transport trailers 330 00:19:10,940 --> 00:19:14,190 parked along either side of the shoreline. 331 00:19:14,190 --> 00:19:17,660 They crawled along with a slowly moving caissons. 332 00:19:17,660 --> 00:19:20,893 The heaviest lift of Italian history had begun. 333 00:19:23,030 --> 00:19:26,130 Once the case since had arrived at the sheltered bay, 334 00:19:26,130 --> 00:19:28,200 the tugboats were disconnected 335 00:19:28,200 --> 00:19:30,760 and the launching operation began. 336 00:19:30,760 --> 00:19:33,763 The two tugboats boats were hooked up to the catamaran. 337 00:19:34,670 --> 00:19:35,950 The launching operations 338 00:19:35,950 --> 00:19:38,820 involved connecting the lifting points of the caissons 339 00:19:38,820 --> 00:19:42,993 to the catamaran for the so-called secondary mooring system. 340 00:19:46,950 --> 00:19:50,030 The caisson was delivered to Fagioli already floating. 341 00:19:50,030 --> 00:19:53,440 It had a dry weight of 12,500 tons. 342 00:19:53,440 --> 00:19:57,770 It was connected to the catamaran alpha inside the basin 343 00:19:57,770 --> 00:19:59,820 and then connected to the mooring system. 344 00:20:05,460 --> 00:20:07,380 Once we reached the exact point of installation, 345 00:20:07,380 --> 00:20:10,490 the caisson was ballasted until it became very heavy, 346 00:20:10,490 --> 00:20:13,030 then it was dropped down to the sea floor 347 00:20:13,030 --> 00:20:15,603 by the hydraulic pulleys or strand jacks. 348 00:20:20,970 --> 00:20:23,360 Once the structure had been connected, 349 00:20:23,360 --> 00:20:25,670 the catamaran was pushed by tugboats 350 00:20:25,670 --> 00:20:30,203 until it arrived over the underwater primary mooring system. 351 00:20:33,060 --> 00:20:36,460 Long wires called trench access lines 352 00:20:36,460 --> 00:20:39,310 showed the pathway or line to follow 353 00:20:39,310 --> 00:20:41,590 in order to get the concrete structure 354 00:20:41,590 --> 00:20:44,610 over the trench curved in the sea floor 355 00:20:44,610 --> 00:20:47,910 and reach the precise sinking point. 356 00:20:47,910 --> 00:20:51,530 Once in position, the caissons were ballasted and sank 357 00:20:51,530 --> 00:20:55,033 using strand jacks positioned onto the catamaran. 358 00:20:56,001 --> 00:20:58,501 (soft music) 359 00:21:03,980 --> 00:21:07,210 Water cushions previously positioned into the seabed 360 00:21:07,210 --> 00:21:10,380 were filled, gently taking the load of the caissons 361 00:21:10,380 --> 00:21:12,823 before they reached the bottom of the trench. 362 00:21:14,370 --> 00:21:16,330 The bags were then deflated 363 00:21:16,330 --> 00:21:18,380 allowing the placement of the caissons 364 00:21:18,380 --> 00:21:20,600 in their final position. 365 00:21:20,600 --> 00:21:24,380 Engineers used precise 3D computer models 366 00:21:24,380 --> 00:21:27,810 to place the caissons with millimetric precision 367 00:21:27,810 --> 00:21:30,080 and slide one against the other 368 00:21:30,080 --> 00:21:33,470 to form a single watertight line. 369 00:21:33,470 --> 00:21:35,190 Even the smallest error 370 00:21:35,190 --> 00:21:37,763 could mean disaster for the MOSE project. 371 00:21:41,180 --> 00:21:45,740 However, this was just the first stage in the massive move. 372 00:21:45,740 --> 00:21:47,640 Once the caissons were lowered, 373 00:21:47,640 --> 00:21:50,220 the floating barriers had to be attached. 374 00:21:50,220 --> 00:21:52,993 This was a massive feat of engineering. 375 00:21:57,100 --> 00:22:01,670 In 2003, the Italian government began investing billions 376 00:22:01,670 --> 00:22:04,210 into a project called MOSE, 377 00:22:04,210 --> 00:22:06,680 a massive barrier to control the tides 378 00:22:06,680 --> 00:22:10,503 flowing in and out of Venice from the Adriatic sea. 379 00:22:11,350 --> 00:22:13,660 Here at Lido-Treporti, 380 00:22:13,660 --> 00:22:17,100 the MOSE construction site rises out of the sea 381 00:22:17,100 --> 00:22:19,173 a massive gray wall of concrete. 382 00:22:20,120 --> 00:22:24,060 But what is underwater and how does it work? 383 00:22:24,060 --> 00:22:25,860 Twenty meters beneath the sea 384 00:22:25,860 --> 00:22:28,423 are a series of massive concrete caissons. 385 00:22:33,850 --> 00:22:36,740 Every barrier has its seven housing caissons, 386 00:22:36,740 --> 00:22:40,833 and 21 gates and two service tunnels, one on each flank. 387 00:22:42,690 --> 00:22:44,310 Workers who build and maintain 388 00:22:44,310 --> 00:22:45,810 these undersea tunnels 389 00:22:45,810 --> 00:22:48,023 take a lift to the bottom of the shaft. 390 00:22:49,910 --> 00:22:53,983 It is an imposing labyrinth of metal concrete and cable. 391 00:22:59,890 --> 00:23:01,460 There are two tunnels: 392 00:23:01,460 --> 00:23:02,790 one for transport, 393 00:23:02,790 --> 00:23:04,970 and another, a lateral service tunnel 394 00:23:04,970 --> 00:23:07,920 in which repairs can be carried out in a hurry 395 00:23:07,920 --> 00:23:09,193 if there is a leak. 396 00:23:10,180 --> 00:23:12,970 Watertight rooms along the side of the tunnel 397 00:23:12,970 --> 00:23:15,770 host the attachment mechanisms connected 398 00:23:15,770 --> 00:23:18,100 through the watertight female housings 399 00:23:18,100 --> 00:23:19,860 to the male part of the hinges 400 00:23:19,860 --> 00:23:24,030 on the outside of the caisson round which the barriers move 401 00:23:24,030 --> 00:23:26,633 when compressed air is pumped in to them. 402 00:23:29,180 --> 00:23:33,010 Each of the hinge rooms is flanked by a service chamber 403 00:23:33,010 --> 00:23:35,290 that allows a diver to enter the hinge room 404 00:23:35,290 --> 00:23:39,363 to carry out any emergency repairs if it is flooded. 405 00:23:40,380 --> 00:23:43,600 The watertight doors need to be checked regularly. 406 00:23:43,600 --> 00:23:46,761 They must be kept closed at all times. 407 00:23:46,761 --> 00:23:49,261 (soft music) 408 00:23:51,260 --> 00:23:53,900 Each caisson was lowered and pulled against the next 409 00:23:53,900 --> 00:23:55,900 with millimetric precision 410 00:23:55,900 --> 00:23:59,290 so as to make the whole length of the undersea tunnel 411 00:23:59,290 --> 00:24:00,883 completely watertight. 412 00:24:03,700 --> 00:24:05,790 The next phase in building the MOSE 413 00:24:05,790 --> 00:24:08,560 is positioning the mobile barriers. 414 00:24:08,560 --> 00:24:11,270 Once again, the heavy lift company, Fagioli, 415 00:24:11,270 --> 00:24:12,803 was called into play. 416 00:24:16,880 --> 00:24:20,860 In this hangar in the Maghera Port shipyard South of Venice, 417 00:24:20,860 --> 00:24:24,990 the massive yellow floodgate is finally ready to be moved. 418 00:24:24,990 --> 00:24:27,490 If you think moving a piano is hard, 419 00:24:27,490 --> 00:24:31,850 imagine this 210 ton steel box. 420 00:24:31,850 --> 00:24:35,130 The whole process of moving the barrier out to sea 421 00:24:35,130 --> 00:24:37,133 would take three full days. 422 00:24:38,290 --> 00:24:42,720 Fagioli uses a special heavy lift transport vehicle 423 00:24:42,720 --> 00:24:46,570 to slowly roll it out onto the awaiting barge. 424 00:24:46,570 --> 00:24:51,023 It is a tedious and dangerous process to move such a beast. 425 00:24:52,860 --> 00:24:57,860 Finally at dusk the barge transport it at a snail's pace 426 00:24:58,290 --> 00:25:01,990 passing by San Marco after nightfall. 427 00:25:01,990 --> 00:25:06,200 A brief glimpse of the very city it is destined to protect. 428 00:25:06,200 --> 00:25:09,800 In order to do the final most delicate phase of installation 429 00:25:09,800 --> 00:25:13,376 at daylight, the crew docks for the night. 430 00:25:13,376 --> 00:25:15,876 (soft music) 431 00:25:18,740 --> 00:25:21,400 Dawn rises over Venice. 432 00:25:21,400 --> 00:25:23,950 The city of water is slowly wakes 433 00:25:23,950 --> 00:25:26,720 doing its daily business by boat. 434 00:25:26,720 --> 00:25:30,920 The barge with the great yellow gate heads out to sea 435 00:25:30,920 --> 00:25:32,903 to its final resting place. 436 00:25:35,850 --> 00:25:37,610 After we lowered the seven caissons, 437 00:25:37,610 --> 00:25:40,890 Fagioli was also involved in the laying and installation 438 00:25:40,890 --> 00:25:42,860 of the flood gates. 439 00:25:42,860 --> 00:25:45,033 To do this, we utilized the scaffolding structure 440 00:25:45,033 --> 00:25:47,590 that was constructed of trellis towers and beams 441 00:25:47,590 --> 00:25:48,943 connected to the towers. 442 00:25:52,370 --> 00:25:53,740 The tailor-made system 443 00:25:53,740 --> 00:25:56,440 included four-tower structure 444 00:25:56,440 --> 00:25:58,950 with two crosshead beams on top 445 00:25:58,950 --> 00:26:01,910 each equipped with four strand jacks 446 00:26:01,910 --> 00:26:06,370 necessary to lower this gigantic 210 ton barrier 447 00:26:06,370 --> 00:26:07,443 into the water. 448 00:26:10,670 --> 00:26:13,880 The support structure was called the fishing beam 449 00:26:13,880 --> 00:26:16,340 as it would be used to hook the mobile barrier 450 00:26:16,340 --> 00:26:20,410 with 14 by 14 axle lines. 451 00:26:20,410 --> 00:26:23,523 The axle lines had to be perfectly constructed. 452 00:26:29,370 --> 00:26:30,880 When the structures were ready, 453 00:26:30,880 --> 00:26:34,180 a large barge equipped with four sets of gantries 454 00:26:34,180 --> 00:26:36,060 was maneuvered into position 455 00:26:36,060 --> 00:26:39,140 and then tower legs connected to a bottom frame 456 00:26:39,140 --> 00:26:42,360 were joined to the four tower sections. 457 00:26:42,360 --> 00:26:44,660 This was a delicate stage. 458 00:26:44,660 --> 00:26:48,020 Every connection had to be precise to the millimeter. 459 00:26:48,020 --> 00:26:51,550 Workers monitored every parameter using radar, 460 00:26:51,550 --> 00:26:54,653 adjusting the cables and hydraulic pressure as needed. 461 00:27:04,060 --> 00:27:05,580 The barge with the flood gates on board 462 00:27:05,580 --> 00:27:08,900 was transported to the Lido-Treporti inlet, 463 00:27:08,900 --> 00:27:11,850 and there it was floated under the force of strand jacks 464 00:27:11,850 --> 00:27:13,543 mounted on the launching links. 465 00:27:14,413 --> 00:27:15,860 The weight of the lifted flood gate 466 00:27:15,860 --> 00:27:18,333 is almost 250 metric tons. 467 00:27:19,669 --> 00:27:21,350 The strand jacks allowed the flood gates 468 00:27:21,350 --> 00:27:22,830 to be lifted from the barge 469 00:27:22,830 --> 00:27:25,973 and lowered onto the caisson on with millimetric precision. 470 00:27:30,080 --> 00:27:32,190 Once the caissons had been laid, 471 00:27:32,190 --> 00:27:34,180 the barges loaded with the barrier 472 00:27:34,180 --> 00:27:37,430 were moved directly under the launching structure 473 00:27:37,430 --> 00:27:40,220 so the fishing beam could hook the barrier. 474 00:27:40,220 --> 00:27:43,290 After this, the area was cleared from the barge 475 00:27:43,290 --> 00:27:45,430 and the barrier was lowered into the water 476 00:27:45,430 --> 00:27:47,910 using the strand jacks. 477 00:27:47,910 --> 00:27:51,090 Then the mobile barrier was freed from the support structure 478 00:27:51,090 --> 00:27:52,483 and fixed to the caisson. 479 00:27:53,780 --> 00:27:57,090 Any misstep could send a 200 ton gate 480 00:27:57,090 --> 00:27:58,483 to the bottom of the sea. 481 00:28:01,520 --> 00:28:03,590 Finally, the barge came back 482 00:28:03,590 --> 00:28:05,950 to load the launching gantry system 483 00:28:05,950 --> 00:28:08,160 and repeat the whole operation 484 00:28:08,160 --> 00:28:10,530 with the other three barriers. 485 00:28:10,530 --> 00:28:14,023 This will be done 78 times. 486 00:28:17,470 --> 00:28:19,380 This is the old Arsenal, 487 00:28:19,380 --> 00:28:22,493 ground zero of the fight to save Venice from sinking. 488 00:28:23,340 --> 00:28:26,610 Once the former shipyard of the Republic of Venice, 489 00:28:26,610 --> 00:28:28,900 today it is reclaiming its place 490 00:28:28,900 --> 00:28:30,963 as the power center of the city. 491 00:28:32,350 --> 00:28:33,740 Here in the main command 492 00:28:33,740 --> 00:28:36,310 and control station of the MOSE project, 493 00:28:36,310 --> 00:28:37,960 engineer Hermes Redi 494 00:28:37,960 --> 00:28:40,510 is in charge of managing the MOSE's reaction 495 00:28:40,510 --> 00:28:44,493 to the combination of high tides and adverse winds. 496 00:28:48,250 --> 00:28:49,380 As we've said earlier, 497 00:28:49,380 --> 00:28:53,070 the floods are caused by a combination of several events: 498 00:28:53,070 --> 00:28:55,360 One is the normal tide, 499 00:28:55,360 --> 00:28:58,130 the other is the southeasterly wind 500 00:28:58,130 --> 00:29:01,370 which pushes the water towards the upper Adriatic, 501 00:29:01,370 --> 00:29:03,610 and so, against the lagoon. 502 00:29:03,610 --> 00:29:06,120 And lastly, there is a standing wave 503 00:29:06,120 --> 00:29:08,393 which contributes to rising waters. 504 00:29:10,510 --> 00:29:11,900 He works hand in hand 505 00:29:11,900 --> 00:29:15,350 with the engineers and technicians of the city tide center 506 00:29:15,350 --> 00:29:18,630 to analyze the meteorological and tidal data 507 00:29:18,630 --> 00:29:21,010 coming into the control room. 508 00:29:21,010 --> 00:29:23,510 It is here where the crucial decision is made 509 00:29:23,510 --> 00:29:28,113 to close or open the 78 gates that make up the barrier. 510 00:29:30,412 --> 00:29:31,650 The parameters of the screen 511 00:29:31,650 --> 00:29:33,320 that you see on the upper left 512 00:29:33,320 --> 00:29:36,270 are the monitors that give us the actual position 513 00:29:36,270 --> 00:29:40,640 of every barrier, its position and its state 514 00:29:40,640 --> 00:29:42,333 should need to activate them. 515 00:29:44,970 --> 00:29:47,993 The central part is dedicated to the weather forecast. 516 00:29:51,830 --> 00:29:53,150 All the other screens 517 00:29:53,150 --> 00:29:56,100 give us information about the lagoon surroundings, 518 00:29:56,100 --> 00:29:59,010 the Mediterranean and the Adriatic sea, 519 00:29:59,010 --> 00:30:01,880 all the data near our area 520 00:30:01,880 --> 00:30:04,230 that allows us to have a clear picture 521 00:30:04,230 --> 00:30:05,830 of the meteorological situation. 522 00:30:14,070 --> 00:30:15,400 There are many parameters 523 00:30:15,400 --> 00:30:18,790 that determine exactly how many gates are opened, 524 00:30:18,790 --> 00:30:20,773 where, and in what order. 525 00:30:22,700 --> 00:30:26,270 We can see normal tides, high tides, very high tides, 526 00:30:26,270 --> 00:30:30,013 and we can react to each individual situation differently. 527 00:30:33,040 --> 00:30:35,240 Today, science and technology 528 00:30:35,240 --> 00:30:38,770 allow for the forecasting of when flooding will happen, 529 00:30:38,770 --> 00:30:40,283 but there is a deadline. 530 00:30:49,060 --> 00:30:51,520 We are able to predict several days in advance 531 00:30:51,520 --> 00:30:53,750 when a flood tide will occur 532 00:30:53,750 --> 00:30:57,350 and to forecast the tides quite accurately. 533 00:30:57,350 --> 00:31:01,230 But obviously as we get closer to the day of the flood tide, 534 00:31:01,230 --> 00:31:03,863 our ability to forecast what will happen improves. 535 00:31:05,060 --> 00:31:07,270 So, therefore, the real moment to decide 536 00:31:07,270 --> 00:31:11,180 whether or not to close the lagoon with the flood barriers 537 00:31:11,180 --> 00:31:14,500 happens about three hours before the event, 538 00:31:14,500 --> 00:31:18,640 because at that time we can determine with total certainty 539 00:31:18,640 --> 00:31:19,893 what is about to happen. 540 00:31:27,600 --> 00:31:29,650 Multiple meteorological factors 541 00:31:29,650 --> 00:31:31,093 must be calculated. 542 00:31:32,180 --> 00:31:34,740 The decision was made to use the MOSE 543 00:31:34,740 --> 00:31:37,900 only when the tide is at 110 centimeters 544 00:31:37,900 --> 00:31:40,133 above average or higher. 545 00:31:41,290 --> 00:31:44,190 Under this scenario, flooding will still occur. 546 00:31:44,190 --> 00:31:46,240 Using various simulations, 547 00:31:46,240 --> 00:31:49,460 Venice authorities are able to determine with precision 548 00:31:49,460 --> 00:31:52,920 exactly what impact floodwaters of different levels 549 00:31:52,920 --> 00:31:54,603 will have on their city. 550 00:31:55,920 --> 00:31:57,360 Venice is underwater 551 00:31:57,360 --> 00:31:59,320 and have a very small number of places 552 00:31:59,320 --> 00:32:01,790 when the sea rises 80 centimeters 553 00:32:01,790 --> 00:32:03,570 above the average sea level. 554 00:32:03,570 --> 00:32:06,840 But the ares subject to this flooding, as you can see, 555 00:32:06,840 --> 00:32:09,220 are the most famous areas of the city. 556 00:32:09,220 --> 00:32:11,780 St. Mark's Square is the first to flood, 557 00:32:11,780 --> 00:32:14,923 and Rialto immediately afterwards. 558 00:32:16,050 --> 00:32:17,690 But when the water level rises 559 00:32:17,690 --> 00:32:21,440 to 100 centimeters, one meter above average, 560 00:32:21,440 --> 00:32:24,500 St. Mark's square is completely underwater 561 00:32:24,500 --> 00:32:28,510 and some smaller streets begin to have some problems. 562 00:32:28,510 --> 00:32:30,760 At 110 centimeters, 563 00:32:30,760 --> 00:32:33,120 the famous rubber boots become a necessity 564 00:32:33,120 --> 00:32:34,453 to get around the city. 565 00:32:37,840 --> 00:32:42,070 At 130 centimeters, the city isn't completely flooded 566 00:32:42,070 --> 00:32:45,290 but it is certainly completely impacted 567 00:32:45,290 --> 00:32:48,570 which means that not only the ground floors 568 00:32:48,570 --> 00:32:50,817 and not only the shops are flooded, 569 00:32:50,817 --> 00:32:53,360 but the store rooms can't be used 570 00:32:53,360 --> 00:32:55,643 and people can't get around freely. 571 00:32:56,577 --> 00:32:58,870 At 140 centimeters, 572 00:32:58,870 --> 00:33:01,720 rubber boots are no longer any help 573 00:33:01,720 --> 00:33:05,400 and the city becomes extremely difficult to navigate. 574 00:33:05,400 --> 00:33:09,670 But it is the Epic flood levels like that of 1966 575 00:33:09,670 --> 00:33:11,093 that are the biggest worry. 576 00:33:14,830 --> 00:33:16,950 Basically, in that situation, 577 00:33:16,950 --> 00:33:19,403 Venice is completely underwater. 578 00:33:20,520 --> 00:33:22,870 Once the MOSE has been activated, 579 00:33:22,870 --> 00:33:26,010 the 78 single barriers emerge from the seabed 580 00:33:26,010 --> 00:33:27,710 in groups of four, 581 00:33:27,710 --> 00:33:31,623 effectively creating a wall between the lagoon and the sea. 582 00:33:34,800 --> 00:33:37,690 A control system keeps the inclination of the gates 583 00:33:37,690 --> 00:33:40,690 when closed at approximately 45 degrees, 584 00:33:40,690 --> 00:33:43,623 constantly adjusting the water inside. 585 00:33:45,200 --> 00:33:47,290 When it is time to open the barrier, 586 00:33:47,290 --> 00:33:49,120 the gates are filled with water, 587 00:33:49,120 --> 00:33:51,680 a process called ballasting. 588 00:33:51,680 --> 00:33:54,530 They slowly come to rest flush with the seabed 589 00:33:54,530 --> 00:33:56,033 invisible from above. 590 00:33:58,490 --> 00:34:01,430 Massive hinges that weigh 42 tons 591 00:34:01,430 --> 00:34:03,810 keep the gates attached to their bases. 592 00:34:03,810 --> 00:34:07,050 There are small gaps, just a few centimeters wide, 593 00:34:07,050 --> 00:34:09,180 which allow a little water through, 594 00:34:09,180 --> 00:34:12,210 but more importantly, allow the gates to move 595 00:34:12,210 --> 00:34:14,733 and rotate on their hinges as necessary. 596 00:34:15,860 --> 00:34:20,860 In October of 2013, the first test was conducted on the MOSE 597 00:34:20,870 --> 00:34:23,873 and the gates were raised ceremoniously out of the sea. 598 00:34:28,780 --> 00:34:30,230 The precise data is boring, 599 00:34:30,230 --> 00:34:33,110 but I can tell you that just by closing half of the inlet, 600 00:34:33,110 --> 00:34:35,420 you could definitely see a lowering of the water level 601 00:34:35,420 --> 00:34:36,600 inside the lagoon. 602 00:34:36,600 --> 00:34:39,543 So the MOSE works, the tide was slow. 603 00:34:45,590 --> 00:34:47,960 However, there is more to the MOSE 604 00:34:47,960 --> 00:34:50,650 than simply massive engineering. 605 00:34:50,650 --> 00:34:53,910 Over the years, despite the scandals attached to it, 606 00:34:53,910 --> 00:34:56,990 the MOSE has contributed to restoring other areas 607 00:34:56,990 --> 00:34:58,600 of the Venetian lagoon, 608 00:34:58,600 --> 00:35:01,543 but even those efforts are not without controversy. 609 00:35:05,260 --> 00:35:06,610 In an effort to preserve 610 00:35:06,610 --> 00:35:09,660 the uncontaminated natural environment, 611 00:35:09,660 --> 00:35:12,700 environmental groups often oppose big civil works 612 00:35:12,700 --> 00:35:15,610 like the Venetian MOSE barriers. 613 00:35:15,610 --> 00:35:17,350 In this case, however, 614 00:35:17,350 --> 00:35:21,050 the ecosystem in question is far from natural. 615 00:35:21,050 --> 00:35:23,580 Sediments carried by the many inland rivers 616 00:35:23,580 --> 00:35:26,890 originated from the lagoon itself in ancient times 617 00:35:26,890 --> 00:35:30,690 by sinking and consolidating below sea level. 618 00:35:30,690 --> 00:35:35,490 For the MOSE, new concrete walls and embankments were built, 619 00:35:35,490 --> 00:35:38,520 and even a brand new artificial island was created 620 00:35:38,520 --> 00:35:40,800 at the Northern most Lido inlet 621 00:35:40,800 --> 00:35:44,593 to host all the service buildings that control the barriers: 622 00:35:45,610 --> 00:35:48,970 On one side of the island is a lock system, 623 00:35:48,970 --> 00:35:51,960 a deep canal for tankers and cruise ships, 624 00:35:51,960 --> 00:35:55,333 and on the other side is a shallower canal leading North. 625 00:35:56,680 --> 00:35:58,830 However, not everyone agrees 626 00:35:58,830 --> 00:36:02,800 that the lagoons should be open to large ships at all. 627 00:36:02,800 --> 00:36:06,100 In Italy, there have already been disasters associated 628 00:36:06,100 --> 00:36:08,600 with large naval vessels. 629 00:36:08,600 --> 00:36:10,670 If one of these ships were to sink 630 00:36:10,670 --> 00:36:12,700 in the lagoon close to Venice, 631 00:36:12,700 --> 00:36:15,890 it would be catastrophic both for the environment 632 00:36:15,890 --> 00:36:17,890 and the residents alike. 633 00:36:17,890 --> 00:36:19,440 It has made the city slave 634 00:36:19,440 --> 00:36:21,600 to the passing of these gigantic ships, 635 00:36:21,600 --> 00:36:23,560 ships that could very possibly create 636 00:36:23,560 --> 00:36:25,280 a legitimate threat of accident, 637 00:36:25,280 --> 00:36:27,650 accidents like the ones that have unfortunately happened 638 00:36:27,650 --> 00:36:29,610 in this country like on the Island of Giglio 639 00:36:29,610 --> 00:36:32,080 with the Costa Concordia and the Port of Genoa, 640 00:36:32,080 --> 00:36:34,360 two extremely grave incidents 641 00:36:34,360 --> 00:36:36,193 that have created terrible damage. 642 00:36:37,450 --> 00:36:39,430 If MOSE is to be successful, 643 00:36:39,430 --> 00:36:41,690 it needs to be complimented by projects 644 00:36:41,690 --> 00:36:44,920 that we restore the lagoon's natural structure 645 00:36:44,920 --> 00:36:47,123 and build up its natural defenses. 646 00:36:49,200 --> 00:36:51,530 The part of the project that concerns the lagoon 647 00:36:51,530 --> 00:36:54,300 is one of the most urgent aspects of the work 648 00:36:54,300 --> 00:36:57,290 because it is necessary for environmental restoration 649 00:36:57,290 --> 00:37:02,000 of the deteriorated areas of the lagoon, but also the shore. 650 00:37:02,000 --> 00:37:04,880 The moment in which the flood gates prevent the tide waters 651 00:37:04,880 --> 00:37:07,350 from entering the lagoon from the sea, 652 00:37:07,350 --> 00:37:10,590 the sea will spread out back along the shore 653 00:37:10,590 --> 00:37:13,653 and so we had to reinforce the shore for this reason. 654 00:37:18,530 --> 00:37:19,620 Some of these measures 655 00:37:19,620 --> 00:37:23,950 include improving water quality by dredging the canals, 656 00:37:23,950 --> 00:37:27,870 which improves the water exchange in the inner lagoon areas, 657 00:37:27,870 --> 00:37:31,410 securing runoff from dumps and industrial areas, 658 00:37:31,410 --> 00:37:33,060 reinforcing the seawalls 659 00:37:33,060 --> 00:37:35,810 surrounding Venice's Island and canal banks 660 00:37:35,810 --> 00:37:39,543 and restoring thousands of kilometers of salt marshes. 661 00:37:41,990 --> 00:37:45,160 Polluted sediment was removed from canals, 662 00:37:45,160 --> 00:37:47,130 but where was it taken? 663 00:37:47,130 --> 00:37:50,330 There is concern due to some of the corruption scandals 664 00:37:50,330 --> 00:37:51,800 surrounding the project 665 00:37:51,800 --> 00:37:54,500 that the mud polluted by heavy metals 666 00:37:54,500 --> 00:37:57,450 may not have been properly disposed of. 667 00:37:57,450 --> 00:38:01,100 And what about the 49 kilometers of new beach, 668 00:38:01,100 --> 00:38:04,283 where did it come from and who will manage it? 669 00:38:06,720 --> 00:38:09,580 There is a risk here, just like in other places, 670 00:38:09,580 --> 00:38:12,040 from the excavation that brings in in soil 671 00:38:12,040 --> 00:38:13,720 from the Southern part of the lagoon 672 00:38:13,720 --> 00:38:17,310 which is obviously polluted and has been since the '60s 673 00:38:17,310 --> 00:38:19,910 by petrochemicals deposited in the seabed 674 00:38:19,910 --> 00:38:21,813 from the Marghera industrial area. 675 00:38:24,270 --> 00:38:27,070 Another concern is the impact MOSE closures 676 00:38:27,070 --> 00:38:29,313 might have on the lagoon water quality. 677 00:38:30,770 --> 00:38:33,040 It is the sea itself that is responsible 678 00:38:33,040 --> 00:38:35,700 for keeping the lagoon waters clean 679 00:38:35,700 --> 00:38:37,750 since there is no sewage system 680 00:38:37,750 --> 00:38:40,423 and black water is released into the lagoon. 681 00:38:41,290 --> 00:38:44,760 Some worry that closing the lagoon more frequently 682 00:38:44,760 --> 00:38:46,360 could tip this delicate balance. 683 00:38:47,890 --> 00:38:49,740 It's the job of the sea and the tides 684 00:38:49,740 --> 00:38:51,698 to clean up the lagoon, 685 00:38:51,698 --> 00:38:52,687 and they come into the lagoon 686 00:38:52,687 --> 00:38:55,250 and they leave the lagoon twice a day. 687 00:38:55,250 --> 00:38:57,890 Clean water comes in, picks up the waste 688 00:38:57,890 --> 00:39:01,090 and takes it back out into the open sea. 689 00:39:01,090 --> 00:39:02,870 Experts predict that sea levels 690 00:39:02,870 --> 00:39:06,070 could rise between 25 and 50 centimeters 691 00:39:06,070 --> 00:39:09,210 between now and the end of the century. 692 00:39:09,210 --> 00:39:13,380 At the same time, Venice is sinking one millimeter annually. 693 00:39:13,380 --> 00:39:15,120 The more frequent the floods, 694 00:39:15,120 --> 00:39:17,843 the more often MOSE must be used. 695 00:39:20,040 --> 00:39:23,050 The frequency of the flooding could increase significantly 696 00:39:23,050 --> 00:39:25,700 between now and the end of the century. 697 00:39:25,700 --> 00:39:27,750 So the need to close the MOSE barrier 698 00:39:27,750 --> 00:39:30,330 could increase from the present five times a year 699 00:39:30,330 --> 00:39:35,330 to up to 100, or 150 times a year, or even 200 times. 700 00:39:35,520 --> 00:39:37,350 And closing the barrier so often 701 00:39:37,350 --> 00:39:38,320 could have an impact 702 00:39:38,320 --> 00:39:40,237 on the quality of the waters of the lagoon 703 00:39:40,237 --> 00:39:41,533 and the city itself. 704 00:39:48,380 --> 00:39:50,240 University of Padua professors 705 00:39:50,240 --> 00:39:53,223 are proposing a companion solution to the MOSE, 706 00:39:54,370 --> 00:39:56,350 an audacious plan to raise Venice 707 00:39:56,350 --> 00:39:58,990 by pumping water into a soil and rock layer 708 00:39:58,990 --> 00:40:00,173 beneath the city. 709 00:40:01,240 --> 00:40:05,110 Our proposal is to raise the city by taking seawater 710 00:40:05,110 --> 00:40:08,670 and building wells 700 to 800 meters deep, 711 00:40:08,670 --> 00:40:11,883 and then pumping the water into the rocks at that depth. 712 00:40:13,010 --> 00:40:14,650 Venice will rise. 713 00:40:14,650 --> 00:40:17,360 We have calculated that over 10 years it could rise 714 00:40:17,360 --> 00:40:21,733 as much as 25 to 30 centimeters very gradually. 715 00:40:24,400 --> 00:40:26,030 Critics say the MOSE project 716 00:40:26,030 --> 00:40:27,370 may go down in history 717 00:40:27,370 --> 00:40:30,790 as little more than a concrete icon of corruption and waste 718 00:40:30,790 --> 00:40:33,253 if it's unable to protect Venice. 719 00:40:37,660 --> 00:40:39,820 It doesn't give any guarantees to the city 720 00:40:39,820 --> 00:40:40,830 that it won't flood 721 00:40:40,830 --> 00:40:43,090 because with a meter or a little over a meter 722 00:40:43,090 --> 00:40:45,550 of water washing up here in Piazza San Marco, 723 00:40:45,550 --> 00:40:47,600 the city already has problems. 724 00:40:47,600 --> 00:40:49,840 And truth, this won't stop. 725 00:40:49,840 --> 00:40:52,680 Either way, MOSE is here to stay. 726 00:40:52,680 --> 00:40:55,200 While MOSE officials say corruption scandals 727 00:40:55,200 --> 00:40:58,250 were reprehensible, that does not change the fact 728 00:40:58,250 --> 00:41:01,080 that MOSE is a naval engineering feat 729 00:41:01,080 --> 00:41:02,833 of incredible proportions. 730 00:41:05,360 --> 00:41:06,710 The work, in my opinion, 731 00:41:06,710 --> 00:41:10,730 is of extraordinary seriousness and quality. 732 00:41:10,730 --> 00:41:13,600 You have to think that for the caissons 733 00:41:13,600 --> 00:41:17,370 that are 60 by 40 by 28 structures, 734 00:41:17,370 --> 00:41:21,450 we have tolerances of less than one centimeter. 735 00:41:21,450 --> 00:41:22,610 In the last year, 736 00:41:22,610 --> 00:41:27,610 we put down 18 of these caissons one every 15 days 737 00:41:27,610 --> 00:41:30,150 without airing by one second 738 00:41:30,150 --> 00:41:32,473 or one centimeter from our plan. 739 00:41:34,320 --> 00:41:36,100 The MOSE construction is permanent 740 00:41:36,100 --> 00:41:38,270 together with all its accessory parts, 741 00:41:38,270 --> 00:41:39,323 and we'll have to live with it 742 00:41:39,323 --> 00:41:41,773 even if it's unable to respond to climate change, 743 00:41:43,050 --> 00:41:44,750 which it seems is about to happen. 744 00:41:52,070 --> 00:41:53,860 We're all waiting in anticipation, 745 00:41:53,860 --> 00:41:58,223 it could be 2016, 2017, 2018, 746 00:41:59,070 --> 00:42:00,200 waiting for the moment 747 00:42:00,200 --> 00:42:02,270 when we'll know for sure if it really works 748 00:42:02,270 --> 00:42:04,940 so we can test if the project will be able to keep 749 00:42:04,940 --> 00:42:06,990 a significant amount of the flooding out. 750 00:42:11,600 --> 00:42:14,220 After it had been pushed back several times 751 00:42:14,220 --> 00:42:18,120 due to the ongoing public works investigation underway, 752 00:42:18,120 --> 00:42:19,710 the Consortium of New Venice 753 00:42:19,710 --> 00:42:23,510 has determined a new June, 2018 date 754 00:42:23,510 --> 00:42:26,143 for completion of the MOSE project. 755 00:42:31,440 --> 00:42:35,040 The whole project is about 87% constructed. 756 00:42:35,040 --> 00:42:37,660 It's missing the last three rows of floodgates 757 00:42:37,660 --> 00:42:40,763 that they'll need to install by the end of 2015. 758 00:42:44,760 --> 00:42:46,280 Although there is some uncertainty 759 00:42:46,280 --> 00:42:49,980 about how effectively MOSE will protect the city of Venice, 760 00:42:49,980 --> 00:42:52,710 7 billion euros have been spent, 761 00:42:52,710 --> 00:42:56,160 and the project is currently the best hope the city has 762 00:42:56,160 --> 00:42:57,610 of not being swallowed up 763 00:42:57,610 --> 00:43:00,453 by the very lagoon to which it owes its fame. 764 00:43:01,360 --> 00:43:03,470 Without doubt, the MOSE project 765 00:43:03,470 --> 00:43:05,440 has been a marvel of engineering 766 00:43:05,440 --> 00:43:09,400 that has utilized the toughest machines and technologies 767 00:43:09,400 --> 00:43:12,933 that the maritime construction world has to offer. 768 00:43:14,330 --> 00:43:15,940 If it does work to save Venice 769 00:43:15,940 --> 00:43:18,740 from more frequent devastating floods, 770 00:43:18,740 --> 00:43:20,550 visitors from all over the world 771 00:43:20,550 --> 00:43:22,090 will still have the opportunity 772 00:43:22,090 --> 00:43:26,678 to admire this wondrous city of water for decades to come. 773 00:43:26,678 --> 00:43:30,011 (soft orchestral music) 62422

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