in Sydney Australia an industrial Army is called into action no one has ever embarked on the scale of what we're doing here deep out of sight beneath the Harbor City a battle unfolds there's constant problem solving every day there's new problems there's new issues battalions of Engineers pick giant machines against Rock and mud to drive a new Metro system through the Beating Heart of the City we have to get there there's no other way the stakes are high and the clock is ticking gotta take every bit of luck you can get don't you in this game this is for Far and Away the biggest public transport project in Australia's history if I'm honest I probably didn't quite know what I was getting myself into a problem thank you across Sydney a small army of workers are reshaping an entire city building a revolutionary Metro system for the 21st century and beyond when it's complete this new driverless Railway will have dozens of new stations more than 150 kilometers of track and create a giant loop around Sydney but with mega Ambitions come Mega challenges major buildings to demolish in the CBD giant holes to carve deep underground and more than 60 kilometers of tunnels to dig beneath the City eight monster tunnel boring machines are conscripted north of the harbor four tbms deep eastwoods and two digs southwards and south of the harbor two more tunnel their way northwards towards the CBD everything in their way is reduced to Rubble foreign [Music] at the barangaroo station site design manager Ali Shard and the team are dealing with a startling Discovery we found the oldest australian-made boat see where that hole's been dug over there next to the hull that's where we got the Keel Marine archaeologist Cosmos coronius has uncovered where the boat was built it's made out of Sydney Blue Gum springy bark and spotted gum so local Timbers and that's what helped us conclusively say that it's an Australian built this it's a wonderful find for archeology but the unearthing of this 180 year old boat risks hindering progress every day the archaeologists work is a day lost Excavating the 25 meter deep station box but after three long months all the pieces have been tagged and removed and will now be scientifically examined and analyzed so the archaeologists have finished taking the boat away and we can now really get stuck into the excavation of the station excavation was delayed in the area around the boat and the race is on to make up lost time the massive steel beam suspending the road are extended concrete is poured over one section [Music] a roof is added so the team can work around the clock while keeping the dust and noise in beneath the roof to make up for the Lost Time excavation is back at full pace with the harbor right next to the site they don't want major water inflow and so far so good the material down there is quite dry we're not getting major water inflows which is something you'd expect next to the harbor Steve kotovich is the construction manager at barangaroo Under Pressure to get back on track time is Steve's enemy time and water it will be tough going if we were to get a lot of water inflow the trucks taking that material out of the hole you know a lot of material be falling out the back all in all it will just create a tougher environment down here necessity is the mother of invention and building this massive ramp from excavated rock or spoil as it's known was a master stroke we're utilizing this ramp as long as we can we're sort of on the absolute limit now as to how much more we can go by having the ramp it's helped us out a lot in that we can get the dirt out you know as quick as we can which is really what we're here for to get this excavation done as quick as possible the ramp raises their game and writes the schedule but it's a temporary fix over the next couple of weeks the ramp will be phased out and we'll be lifting the dirt out using the clamshell excavator that you see over there no ramp means no direct access for trucks deep below and the pace drops cranes are now called in to get dirt out to trucks on the surface still 2 000 tons of dirt a day are moved out threatening to add to congestion on Sydney streets the barangaroo team must find another way to ship out its mountain of spoil so what's unique with the brangaroo site is that the material that we're disposing from here is leaving our site by a barge at the other sites we're taking spoil Away by truck you know it adds traffic to the city here we've got a brilliant transport path using the harbor behind me is the conveyor system this conveyor is used to load the crushed material inside the spool shed onto the barge that's parked on the waterfront one barge can carry about 60 truckloads of spoil it's all stowed away to keep the neighbors happy we are in one of the Prime Vantage points of Sydney there's a lot of high-rise around us the minute we get a speckle of dust or a slight plume the phone calls run hot doing everything we can to keep everybody happy and that includes recycling this barangaroo spoil is shipped up the harbor for use on other construction sites as the station box gets deeper walls of exposed rock Tower over the underground site like a giant gemstone the rock face is honed to reveal the natural beauty of the Sydney sandstone it looks as solid as rock but Sandstone is porous so water Finds Its way through it begins to pool at the bottom of the box it's a challenging environment it can get where it can get muddy and until we've waterproofed the whole station and lined it so the water can't get in we've got to keep pumping it away there's a lot of water coming in so we just got to make sure that the pumps are working fine as pumps work full Pace to keep the Box dry this operation could get stuck in the mud and as more machines are drafted in things get a bit too cozy for comfort the logistics is going to get really really tricky making sure that there's enough space for everybody to work in and everybody's not climbing over each other just meters offshore from barangaroo right near the Harbor Bridge the geotechnical team are preparing for a risky mission to discover What Lies Beneath Engineers need to know what type of rock they'll be tunneling through deep below the harbor floor beneath the sand silt and sludge ideally there's only Sandstone like the surrounding City perfect for tunneling Engineers will try to drill sample cores up to 80 meters below the water surface they must know exactly what kind of material will be both above and below the tunnels as the sun sets two drilling rigs head out armed with the geologist's coordinates this is a working Harbor and busy transport hub so in the interest of safety the team must burn the Midnight Oil we're drilling on a waterway that is the most traffic waterway in Australia world-renowned geologist Dr David Ock is overseeing the drilling it can only begin in the dead of night well after the rush hour has passed this is probably the first time this sort of work's been undertaken on a harbor without interruption from major vessels fuel tankers and cruise liners the platforms need to drill more than 50 boreholes and probes all the way from the southern Shore to the north it's a six-week job as each core sample comes in it is carefully analyzed and a map of the harbor floor takes shape this is actually cohesive in science the sun is just from uh it's just a kind of veneer excuse me there are some remarkable findings stop becoming Sandy here yeah in one section the harbor floor is 21 meters deeper than previously thought oh that's yes that sounds far more concerning towards the middle of the harbor there's no Rock oh look at this wow there is instead soft mushy sediment that's interesting look at look it seems like um it could be you could do actually I agree look at it pretty exciting I'm covering the harbor amazingly the core samples contain fragments of charcoal and Timber wow from 50 meters below the surface yeah so this material here is just charcoal Timber probably a Bushfire material that's just floated down the ancient Sydney Harbor and deposited in the sand probably the first time these have been brought out in the open for nearly 20 000 years during the last ice age the harbor was not a harbor it was instead a valley covered in forests with a small river running down the middle of the valley towards the sea which was then 25 kilometers further east as sea levels Rose the ocean Advanced West the valley was flooded and the forests drowned the geotechnical results provide a wonderful insight into Sydney's remarkable past but they make alarming reading for engineers instead of boring through stable solid sandstone tunnelers will face clay sediments the remains of the ancient riverbed right in the middle of the harbor it's a daunting Prospect especially with a massive weight of the harbor pressing down from above most of Sydney is for sandstone a bit of a tunnelist dream it's like carving out a bit of a hole in Swiss cheese really easy really stable sort of material but if you dive down under the water here what you'll find is slush and sediment and if I'm a tunnel that's not my dream anymore that's actually like trying to Tunnel through yoga so imagine trying to cut a hole in yogurt and hope that that hole will stay there without doing anything that's what our tunnels have got to do when they try and get under this Harbor this little section from one four Shore to the other is an area that we're particularly concerned about getting right from an engineering point of view first and foremost we want to keep our construction workers safe while they're building it and in the long run we want to make sure that that tunnel is secure not just for the next few years but for the decades and centuries ahead in Guangzhou China the last TBM to roll off the production line is a very special rig called a slurry machine its only job is to get through the soft ground beneath the harbor her name is Kathleen named after Kathleen Butler the technical advisor to Sydney Harbor Bridge engineer John Bradfield and while Kathleen Butler went over the harbor a century ago her namesake is going deep under it her International crew has come to the factory checking her systems thank you there's mckaylee Petrus from italyzed I feel very excited because I was waiting this moment since long time it was a year of preparation and now finally we have the machine ready to go so I can really wait a moment to to see the Qatar attorney the first day leading Kathleen's team will be Andreas mint from Germany he knows the conditions that await him beneath Sydney Harbor are perilous in the extreme remember from your childhood days building a tunnel on a sand bit or out in the dirt it's very soft material so if you try to build a tunnel in this type of material it just collapses naturally to stop the soft sediment or yogurt collapsing into the machine the front of this TBM is highly pressurized pumped full of liquid Bentonite and high pressure air to repel the pressure of the sediments and mud and stop it from flooding into the machine so we basically create an equilibrium between the existing pressure in the in the ground and the TBM which is Excavating the tunnel making sure we don't get any collapse of the tunnel bites we move forward using high pressure Machinery underground is fraught with Danger just behind the tbm's nose section are two hyperbaric chambers when we do work in the front when we have to do maintenance on the cutter head people need to go into this chamber these small airtight rooms provide access to the nose section and also serve as compression and decompression Chambers for the crew working in compressed air is like diving you might know when you go diving when you come up it takes some time to slowly come up it's very much the same here when we do compressed air work without the chambers the crew would suffer the bends [Music] Kathleen's crew must be able to handle working at the high pressure business end of the machine we will train them on how to work in here how to react if there is an emergency and to ensure that they can work safely and carry out those works the alarmers need to get in to check the Cotter head you have the scrapers here as well you have a lot of wear Parts on it and you always need to go into the front to check is really important on any machine that's in the front line it's a potentially hazardous operation far beneath the seabed where nothing is more important than the safety of the crew the challenge of this job is first of all to keep a safe environment for everybody because we are Excavating under the harbor when we are tunneling under Sydney Harbor they are no Second Chances [Music] Rod Staples the city's transport Chief and architect of the Sydney Metro project is wary of the risks and dangers that lie ahead tunneling under the harbor he heads to the UK to inspect a recent tunneling project first hand in London as in Sydney these train tunnels had to be dug beneath a major waterway in this case the Thames Simon Wright leads the British project it's a bit more like trying to cut through yogurt the more you dig it out it all falls in on itself we have a lot of yogurt yes but London Clay is perhaps a bit more cheese-like it's a kind of Fairly solid yogurt pleased to say that the ground control the settlement of the yogurt collapsing in itself was pretty good thankfully how are you doing with that Simon takes rod on a tour of his crossrail project we're tunneling sometimes came extraordinarily close to existing infrastructure we had to weave our way between the existing Northern line and an escalator Barrel there's about 380 millimeters under the escalator barrel and about 500 millimeters above the northern line literally that far away and and in the highly specialized world of Mega engineering projects the best learn from the best if major programs can learn from each other globally and build upon this library of data and information and good practice then we will all get a lot better A lot faster at what we do but Engineers are a competitive Bunch especially when the title of world's best metro is up for grabs for me the battle will be won or lost on the systems and getting the testing commissioning right our backers to have the best customer outcome oh well there you go we'll see we'll take a ride on each other's Railway and we'll uh have a glass of wine on the outcome how's that look forward to it thank you well done cheers [Music] Nick in Sydney it's a big day the tunneling team are taking delivery of Kathleen [Music] after a long journey of more than 9 000 kilometers she has to travel just one more kilometer to reach her launching site at barangaroo unlike the other tbms however she won't be making this trip by truck she gets transferred to a barge which is going to end up here and all the pieces we take off the barge and start putting all the pieces together and there's a lot of pieces Kathleen's pieces are offloaded nearby at White Bay a port also used for International Cruise ships the three largest components will be transported together so they are being craned out of the ship's home and lowered directly onto a barge one by one the huge sections of the slurry machine are gently loaded aboard after some final checks of the all-important cut ahead the barge heads off across the harbor to her launching site [Music] since work is still underway in the station box Kathleen will be assembled in her very own shaft so we're not just digging a hole here we're also setting up to start our tunneling works decided early on in the piece that we've excavated what we call our Northern shaft and what that did are decoupled the crossover cabin from the station box we could have started the tunneling at the station here and going under the harbor but to take site there's a lot going on and it's just not the most sufficient way of doing it so it means that we can separate the two activities and we can do the tunneling at the same time as Excavating the station box this has created more challenges Kathleen shaft had the Mann Street Bridge the massive size of her largest components means it will be a tight squeeze or it's pretty tight the engineers at the start and our designers sort of left nothing to spare but that'll deal awaits the more immediate challenge is getting Kathleen off the barge at dusk the largest pieces are floated in towards the shore it's high tide and it has to be this Mega Machinery can't be craned off it needs to be driven off safely as the barge floats next to the dock to have the best chance of doing this andreas's team has brought in a special multi-wheeled machine called a self-propelled modular transporter or spmt it's a scene straight out of NASA responsibility Falls to Andreas to make sure nothing goes wrong a lot of preparation from the whole team will now bring the machine from the barge onto the land and then at barangaroo and spmt is an extremely agile machine each axle can be moved independently and separately jacked up and down essential for transporting a massive load across uneven ground which is exactly what it faces now driving the huge TBM components off the barge so if it drives the spmt underneath the Lord reject the spmt up we pick up the Lord and then we drive away with the Lord on the spmt this is pushing the envelope even for a sophisticated and powerful machine like the SPM team it must lift at 220 ton cylinder balanced on a barge which is floating on water if the spmt doesn't lift the load perfectly level the massive machinery and its Precious Cargo could tip over into the harbor the team can't afford to put a foot wrong but soon there's a problem the tide starts to turn and the lower the water gets the steeper the climb to the dock with every passing minute The Climb steepens and the operation becomes more dangerous the operator revs the massive engines but it's still not enough if they can't make it now they'll have to wait for the next high tide 12 costly hours away one last push and finally solid ground Andreas can breathe again try to see the machine finally arriving here at barangaroo right in the Heart of the City another extraordinarily challenging station excavation is about to start Martin place gateway to the heart of Sydney's Global business and banking sectors like Central Station Martin Place must stay open while a whole new station is hollowed out below giant new Metro cabins and tunnels will be carved out just a few meters away from the existing operating train lines at the same time enormous boxes will be excavated to support two new skyscrapers as well as the station infrastructure like escalators and the cafes and shops commuters will pass through as they descend to their trains this new station is extraordinarily complicated and will eventually rival Central as one of Sydney's busiest [Music] above the station will rise to new landmarks one 28 stories high the other even higher at 39. together they will be a new workplace for thousands of people but there's one major complication [Music] this Heritage building 5th Fifi Martin Place built in 1928 needs to stay exactly where it is once the city's tallest and most expensive building its solid red granite base and ionic columns are a Sydney landmark and it needs to stay that way sitting above the massive new station that will be hollowed out below project manager will Freelander is working with the building's team to ensure it is protected over 10 stories high it's a full city block and we're basically going to construct a railway station directly below it working around and Below 50 Martin place without disturbing the historic structure is one of his more daunting tasks so we've got to do a whole bunch of geotechnical research we've got to do investigation in the area to make sure that all those tunnels that we're going to put below are not going to cause the building to move in a way that would damage the supports or damage the facade Michael Silman is the Project Director for the station and the new skyscrapers he also oversaw the complex restoration of 50 Martin place he is understandably cautious about all the caverns and tunnels to be dug beneath his bank The National Trust has given it its highest category essential to the heritage of Australia and so that's kind of a bar that not many other buildings in Australia have we're not expecting any form of significant damage there's a net over the stained glass window and before the excavation Works start we'll be installing a net in the grand hall so making sure we protect the Heritage elements of the building is absolutely the top priority will and Michael must take extreme care that the teams work around and below the bank does not undermine this grand old building it is Grand probably not everyone's taste in their household but certainly spectacular to visit and I want to leave it that way will has installed all manner of gadgets the latest technology to detect any unexpected and unwanted Movement we have noise and vibration monitors on multiple levels in the building and in multiple areas we've got noise meters measuring the groundboard noise that's traveling through and also the Airborne noise that's coming through the windows and we've also got vibration meters down here picking up the ground born vibration you come in here and you see the marble features and the columns you really understand that any changes below could affect you know the 12 or 13 stories above when we have a process where we get together and analyze the data um so that gives us a lot of comfort that things are being well monitored 50 Martin place is in safe hands but the building's next door are destined for demolition and reducing them to Rubble falls on the shoulders of Brian Marshall Mid-City demolition is quite high risk we're taking down a building one of them's it's at 28 stories high we've got to put the machines on top of the building in the first place as night falls and city blocks are shut down the team prepares to lift excavators onto the tops of the buildings they need to demolish great care is taken attaching the chains no one wants to see a three-ton machine plummet back to street level we need to work out what pressures those cranes are going to put on the pavement because there are Services there are access tunnels and different structures that are directly below the pavement we need to make sure that we're not going to cause damage to those or cause the pavement to fail and have an issue with the lift itself the first of three excavators makes it onto the roof 80 meters above the streets below in the coming days The Wrecking Crew gets to work turning concrete to rubble and dumping it all down the center of the building where the lifts used to be this is the fastest and most efficient way to get rid of a high-rise building in the middle of a busy City adding to their challenges will and Brian have to keep the decibels down within strict limits we fully acknowledge that we are in the middle of the central business district and so one of the methods we use is wherever possible we employ munchers rather than rock hammers which use hydraulic power to crush the concrete rather than using the Hammers which belt the concrete and create a large amount of noise [Music] noise limitations for what we can do and for how many hours we need to give respite times so we normally only hammer for two hours then respite for an hour the quicker they can make these buildings disappear the better and the demolition soon Hits full pace it takes just six days to demolish each floor soon the two buildings to the north of 50 Martin Place disappear followed by the 28-story building to the South once they're gone digging the southern shaft can begin [Music] responsible for Designing Sydney's new Metro trains is Frenchman Xavier Allard he wants to give the trains a unique Sydney touch and has found his inspiration at the Royal Botanic Garden I think it could be really interesting to use the idea of roots coming from the ground for the front end of the train so it could be interesting to express stability to express something capable to give confidence to the passenger I think it could be good and could be unique also for passing day [Music] back in Paris Xavier and his team try to bring this Vision to life sometimes it shoots sometimes it doesn't suits as the tree coming from the ground and sometimes it's really really really important to change our position to change our inspiration in order to fulfill with the customer expectation and you know that the design theme of your train is based on the tree so if you look out for them Rod Staples like Xavier's design for the front of the train but he's more concerned with the train Interiors pair use the latest 3D technology to walk through the concept train so the handholds most people be able to reach those or will only be for tall people like me we have tested the talk with Xavier was you wanted a real sort of modern feel but a spacious feel yes so the old metros didn't have that because they were all closed off of the newer metros have opened that up and you can you can watch the the train Meandering through the tunnel and it gives you the color schemes and so forth for a big topic and wanting to make it light and vibrant yeah it's something we are in progress by Chance the architect in Sydney designing the stations on the Northwest Line has also been inspired by Nature for Ross de Lamont the leaves of the local Blue Gum Tree are the key so what we have here is the the arching form of the roof landing on either side yep call it coincidence called divine intervention two designers working independent of each other they've come up with a great idea and sometimes people think you do things deliberately sometimes you just have a bit of luck [Music] the canopy forms of the stations they're not purely a leaf form but you can see the organic nature of that beautiful form draping Over The Concourse I have a very strong believer in the importance of getting the engineering right these jobs are so big and so complex that you have to solve the engineering problem but you can actually use the engineering design criteria to make beautiful structures no doubt I had high expectations from the very beginning about what we create here and there's two there's two very strong messages think outside the box and really push yourself to come up with a great design transports brief to us was to really create the next generation of Transport Excellence I gave them the space to go and do something extraordinary and I think they did more than that I think he absolutely nailed it tunnel boring machines are remarkable efficient mobile tunnel making factories designed to keep workers safe deep underground refined over many decades the TBM design means the crew is never exposed to unsupported Rock simply the concrete tunnel is built inside the machine as it moves forward like a giant mechanical worm it leaves a finished tunnel behind it the concrete segments are brought up into the machine and a robotic arm lifts each one the segments are secured to the others and bolted into place six concrete segments make up one ring then powerful hydraulic arms push off the latest ring created providing the force to move the TBM along the tunnel all the while spoil is constantly being conveyed out the back of the TBM and down the tunnel on giant extendable belts TBM Nancy started tunneling from marrickville four weeks before her sister mum show but the difference is now down to less than two weeks mum Shull is catching up it seems rivalry is Alive and Well between competing TBM Crews Brendan Timmons is the TBM operator on the Nancy crew we did have a good lead on them before but they're probably a bit closer than what they were but yeah it's all good just to get a friendly Banner with the boys just friendly banter sure so who will be the first to the Finishing Line at barangaroo where tbm1 so I'm hoping we started before them so I'm hoping I sure do hope we finish before them anyway Timo fears that going first being the Pathfinders could be a disadvantage I suppose any any little dramas that you do have like they get a little heads up where the guinea pigs really so Timo and the other Crews keep track of whether they're getting ahead or lagging behind by keeping a tab on the number of rings they've made compared to the other crew I checked on my conveyor screen wall 377 rings in front I think we're back down to only 100 or so so boys ring up how many do you get today and it's it's the same as anything hopefully we break through first but whatever it is it is breakthroughs aren't grandstand events on the Northwest Line at Hills showground a large crowd gathers for the big moment it's not long before TBM Elizabeth makes her presence felt after devouring almost 430 000 tons of rock over just 4.2 kilometers TBM Elizabeth gently noses out a small slab of rock almost there she makes one last push but suddenly a huge piece begins to fall further to the right for an alarming moment the entire wall shudders and huge Rock slabs Begin to Fall [Music] then Elizabeth smashes through into the light [Music] it's been a long hard journey and her Battle Scars are clearly visible over the coming days she traverses the station box towards the city end and plunges back into the darkness once again [Music] bank at barangaroo it's time to put the specialist slurry machine TBM Kathleen to work yeah and you've got the one for eign the team finalizes the plan get the components underground then assemble so when I bring it in I will make sure the tread is 100 level and then from there you just give us the instructions decision is better and the only thing I want to tell you is that when we are on the final lift the clearance that we've got okay the shaft that Kathleen's components will be lowered down is 340 meters away across the road above the station box the road authority has agreed for traffic to be stopped only between the hours of midnight and 5am one of Sydney's most popular celebrations the Vivid Festival is currently in full swing with only five hours to get Kathleen to the shaft Andreas is up against it tonight you will bring the frontier first and then the middle shield from here out to the side across the road into the shed and then down into the shaft and into the Dodge cabinet sounds easy a little bit more tricky than what it sounds first of all that we have to cross the road which we can only do with the road closure andreas's right-hand man Vincent Gane gets ready for the green light at 12 we've got the road closure so we are gonna get first front ship and then the rear shift across Hixson Road we're gonna get to the shed and lift everything down tonight it's critical that we get those two pieces across the road otherwise we'll be in big trouble [Music] there will be challenges that's that's for sure but we have the right people here to tackle them and to sort them out as we approach them it's going to be very tight both in terms of time and the space available beneath the monstreet bridge if there wasn't enough space because account is 13 meters but when they're measured it was only 12 and a half so Andreas confers with the Jamie church one of the site engineers there's been some confusion about the amount of clearance beneath the bridge so and if he puts his 12 and a half in it's almost exactly 13 meters at the top so there shouldn't be a problem by andreas's calculations there's less than half a meter to spare 400 mil there should be enough space and also the angle it should be okay and as far as Andreas is concerned that's enough it's go time thank you at 11 o'clock the spmt gets the first giant piece of Kathleen on the moon it crawls towards the road when the road closes at midnight the team want to be ready okay we have five hours now Road is closed we need to get the TVM across the road let's go the countdown is on with 190 tons of Machinery on board every move must be inch perfect there's already over an hour on the clock and the next obstacle Mund Street Bridge Is Yet To Come the top of the cylinder stands over 12 meters above the road but mere centimeters below the Bridge's concrete slabs Andreas hopes that his calculations are correct it's all way too close for comfort then it's through but the tightest squeeze is still to come the massive load Maneuvers towards the shaft and now they'll be rigging it up with the ganti crane though they're going to Grinders the yellow one there and then lowering it down the shop into the panel so we are going to lower the TBM Shields down into the soil it's an extremely tight tight spot the machine just sits into this hole they become clear how small the shaft is just millimeters on either side so a very delicate operation with millimeters to spare in some places Andreas is understandably anxious it's Do or Die time a Gantry crane brings the massive load out over the shaft and begins to lower it towards the bottom 30 meters below in places the giant cylinder comes within a whisker of the sheer rock walls but the team hold their nerve and she's through without a scratch there's one down and two to go the spmt heads back for the next piece taking time out for a quick pit stop we're just stopping for a better feel and as soon as we finish filling up we'll get back into moving the shield two hours and 15 minutes we should be able to make that easy I have no problems at all I think we're good for time we'll uh load up the second shield and then they go across the road this second Shield is bigger than the first this is the biggest piece of the TVM so it's critical that the guys get it lined up properly for under across the road two hours to go to go home and I reckon we're making plenty of time bigger than our last section so it's going to be a bit tighter this one is the most challenging the spmt strains against the enormous weight and gets on the move the real test will come when it reaches the shaft and crane this piece is 220 ton the crank capacity is 220 ton so this one will go on full capacity on the crane there [Music] The Shield makes it across the road and Glides under the bridge the team just make it before the road reopens the road is open now yeah thank you now it's test time for the Gantry crane right on the limit of its lifting capacity there is zero room for error in a night of tight squeezes this is the tightest with anxious eyes watching it finally arrives at the bottom the team inches the 220 tonne monster into position joins it to the first shield the next piece to descend is the cut ahead the Gantry crane over the shaft is the only crane that can lift any of the three Mammoth components the last piece of this giant jigsaw is finally ready to heave into place it's a big puzzle and uh very challenging bring the color head down have to come back in again crane lifting point is moved from the center to the side of the cutter head it's now suspended in mid-air like a giant Target Take Aim bullseye while Kathleen is being assembled so too is the crew that will carefully guide her Voyage beneath the harbor the Internationals Vincent mckaylee and Andreas are joined by Aussies Red Dog and Griffo my name's Daniel known as a red dog I don't know where the red come from but uh engineer Jamie chirk has also joined the team she has never worked on a TVM before this is my first TBM so I'm very excited actually because I'll be learning so much new things every day I'm also very nervous anxious for the same reason that it is all new I guess when something does go wrong it's just good to know like what's the decision we need to make at the time next time TBN Kathleen faces her biggest challenge in the mud under Sydney Harbor if you drop the pressure the water would just trace it at this point absolutely racing it's a bit of a critical time it really is mass graves are discovered in the middle of Central Station unfortunately we've got a quarantine area handed over to the archaeologists and they'll do their work on it and hopefully hand it back to us pretty soon fingers crossed and Martin place deep underground obstacles present a major challenge so we come within two meters of the existing Eastern suburbs Rail lines and we actually come within 500 mil of the tunnels that we're constructing at the moment [Music] foreign [Music]
2023-07-31