gsco, I'd have thought that the first hurdle for any enhancement - besides the environmental impacts - would be the issue of access and whether the investment creates something with the most benefit for the most people. Yeah nah. A sneaky second application, for the vertical wall was seen by very few. Kimura (2016) "When a seawall is visible: Infrastructure and obstruction in post-tsunami reconstruction in Japan" By doing so they have encouraged similar management intervention from beachside landholders by 1. demonstrating part liability for coastal erosion processes by building such a structure that threaten adjacent properties and 2. My understanding is that the hard seawall was constructed with the specific intention to protect the private property behind the wall. Apparently this is just one part of the seawall. Its brutalist engineering, says Gordon frankly. The Collaroy seawall was in part constructed after a significant storm event in 2016 eroded 50 metres along the Narrabeen and Collaroy shoreline, causing damage to waterside properties. Sorry to sound pedantic but we should clarify exactly what we mean by "Hard Structures" as it's too general a term. Until then the owners can continue to enjoy their delightful seashore experience. Has any one ever suggested an off shore reef, seems like a win-win or is the sea floor unsuitable? Mr Horton said current conditions have exposed a temporary rock bund that was put in place to protect the construction site, but it will be removed when works are complete. walkways to viewing platforms & beaches, selective weed management, planting, education, etc), Give nature a chance, it will rebound & stabilise dunes or else find a new equilibrium.< inland. Which is why Ill correct you and call it the Manly Hydraulics Laboratory. Well, it (and a lot of us) could possibly be in for a real test within 3-5 years with the Thwaites Glacier (Doomsday Glacier) suggested to be at risk of sliding into the sea and potentially raising sea levels by 65cm. Just wondering if the stairs built into the wall are private property? Taxpayers pay millions of dollars on a asset that will require '000s thousands if not millions of dollars in annual maintenance to protect the value of a tiny handful of multi-million dollar properties owned by multi-millionaires who thought nothing of buying a property directly on a beach for a solution that only kicks the can down or up the coastline for some one one else to deal with. Damaged houses and a collapsed swimming pool at Collaroy beach after waves of up to 8 metres hit the coast on June 6, 2016. You can cry about why it wasn't their fault but that doesn't change anything at all. Stupid dumbfucks. Perhaps at best, the council acquires the land and owners get a sum to relocate to a 'normal' house west of Pittwater Road (god forbid). The sea wall forms a permanent, stationary barrier between the sea and the land. The activism of Tom Kirsop is legendary and in December 2019 Northern Beaches Council honoured him with a park at Narrabeen called Surfrider Gardens. Im just saying its a difficult issue, beachwall terrible and if its sets a precedent huge chunks of the coast stuffed. Spot on tango. Better still put them on a rocket for deep-space explorations [the missions that don't return] Its like stepping forty years back in time. Will this mean sand depletion north and a build up south? Please please please don't let those greedy fucks do this to Australia. For a couple of furlongs it was quite close to the ocean but nobody cared. "We have the Tools and imagination" Imagine how fun that'd be with your mates on a boog. Given that it seems to fly in the face of best practice, has anyone asked what the NSW Coastal Council has to say about it? Much bigger. There are plenty of other spots along the coast vulnerable to rising seas and more intense storms but Collaroy is one of the most difficult to address. They blend in quite nicely and have provided easier access to the breaks and so far been a success in the regions theyve put them so I fear theyll continue to put them in everywhere thinking they wont caus too much damage to beach profiles elsewhere. It's an interesting point whether you just blame the owners for buying a house in such a risky area and hoping taxpayers will bail them out, versus the fact that the council must have approved people building houses there in the first place (although possibly a very long time ago), "Professor Short said the council bought properties along the beachfront and turned them into parklands in the 1970s and attempted to put a moratorium on redevelopment in the 1980s, but lost its case in court.". Making it deeper? Great article highlighting the competing interests of the natural environment and local councils (which are too easily manipulated by wealthy stakeholders). With the benefit of ignorance, having not seen the actual plans, I'd be surprised if the foundations were able to fail easily as I'd expect they'd have been designed explicitly to avoid it. Structures appeared. If anyone used it and saw the second DA let me know. Those days are gone, but we can make the future even better IF we use our brains like you say! If that was the only report they did then it would be good to know on what scientific advice, if any, they changed the plan. The only way now is to harness the power of coastal construction science and engineering. So they all get their own private beach access. The recently constructed Collaroy seawall yesterday failed - or passed - its first real test, depending on which side of it you stand. And as I said in my first comment that is because of the road. You would never be allowed to build an incorrectly designed bridge, so why do these people get away with doing that at our beaches ? The erosion at Collaroy/Narrabeen Beach is not particularly significant, unusual or surprising. For Sydney its not just beach suburbs. There's been significant coastal erosion (acute) along the GOR in recent years, though only a handful of places have experienced coastal recession (chronic). Owners, Council and 'engineersshame shame shame. The Northern Beaches took a massive hit by big surf and a king tide . It is a difficult and wicked problem. Would be interesting to see the state of that beach on the north side of breakwall now, This was the same dune system a few years before all these easterlies. Wow, that is ugly even by brutalist/modernist standards. Mr Horton said there has been some very minor erosion at Collaroy/Narrabeen Beach this week, along with other NSW beaches, but it is not a cause for concern. Installing the Pilings is the fourth step. The 18-year-old scored a near-perfect 9.50 in the Final, held at Seaside Reef in Encinitas, California. Seawalls form a defining line between sea and land. https://www.9news.com.au/national/weather-nsw-sydney-collaroy-surfer-pul Sydney 'Living' Seawalls >>How can you say there is no evidence unless you have the facts to prove it? All of which. If no acquisition or buyback is made, then good luck to the owners trying to sell these properties. If you want to witness how to do irreparable damage to a coastline, look no further than Japan. That means that the Feds have all the money, the States some and the councils bugger all. Stop wasting money and do something that will achieve the intended goals. The Act was introduced by Rob Stokes, the NSW Minister for Planning and member for Pittwater. Should this critical lens be applied to other topics such as the Coolum wavepool? Honestly he might be correct based on the Manly erosion hahhaa. If they approached the landowners then the most they would be offered is market value. Absolutely spot on, Craig. If that is to be avoided there needs to be a concerted effort to gain the support of the wider NB community to create pressure on the council to develop a more acceptable plan. I think they would be very happy with an ugly seawall. BB has there been any attempt to take the process to the Land and Environment Court? And it would also provide some useful evidence for fighting against any similar future proposals. It breaks my heart. Apologies for misreading you. The Feds and States are the only ones with sufficient means to do anything, but for them its a case of not my problem. This seawall will not only protect our homes but also Pittwater Rd, and the many communication and public services installed under it, from inevitable future storm events. Further to the north, sand that was built up in front of properties has been scoured away leaving an eight foot drop-off. I have limited state / lga experience but my perception is this broader thinking can get lost in short term self interest (putting it politely) as touched on by BB and others. A man whose million-dollar beachfront property on Sydney's northern beaches was damaged by king tides says he and his neighbours are happy to chip in for the construction of a sea wall. Some interesting papers about building seawalls and the effect it has on risk perception in the post Tsunami context in Japan: Littlejohn (2020) "Dividing worlds tsunamis, seawalls, and ontological politics in Northeast Japan" The finished work is 100 metres long by 13 metres high. So would you like to inform me as to WHO designed this monstrosity if it wasn't an Engineer? 42 online submissions ALL supporting the wall but many seem to think it would be a sloping rock construction. (Those suburbs are just local ones I know a bit about. And there's no risk. A few pics. Instead, sand nourishment is the popular solution to maintaining beach width, though both Donohoe and Gordon are feeling once bitten and skeptical of any council promises. Water is manageable but comes with a huge expense and loss of nature. Aside from high tides and Tsunamis, Im guessing most islands/atolls dont suffer much erosion when surrounded by reefs? Perhaps the omission was because in 2002, protestors, led by Brendan Donohoe and Surfrider Foundation founder Tom Kirsop, formed a line in the sand stretching from Collaroy to Narrabeen opposing the construction of any seawalls. @yeti. I watched a 4 corners or foreign correspondent thing last year on the Japan sea walls. The first application for a sloping structure was widely publicised and accepted by most who saw it. Everything else may go but that wall is here to stay. Am I missing something with the job title there? Section 2.4 Item 4 - classic stuff. As I understand it, governments have been reluctant to purchase vulnerable properties because there will be so many of them and the public purse could never afford it. But unlike a rock revetment at Stockton, which gradually collapses into the beach, Collaroy's sheer concrete wall relies on deep foundations to stabilise it. Bumper Farrell had the prime position. (AO) How about dredging narrabeen lagoon?? heres a rad idea for you,dig canal from coast to central Australia which is considerably below sea level and flood the interior.could also be done in death valley USA.now that could be a wave pool!! All of Ramsgate, Brighton, Kyeemagh, Dolls Point, Scarborough Park and lots more will be underwater in 50 or 100 years time. Done well they could create added atmosphere to the beach life we love to live here for. The coastline in SW Vic has evolved to respond to a dominant SW swell and storm pattern - that's why the beaches face the way they do. At the same time it would put an end to the constant dredging and relocating of sand from Narrabeen 2)How much did the Collaroy Carpark Coastal Protection works cost? Councils of times gone by should never have approved houses to be built on the beach in known spots of erosion aswell as houses on the beach full stop as sand dunes have there purpose . OMG!!! Who could forget the MOLE building or the spoil from the North Head Sewage Works tipped over the cliff? There's only a loss to be made for the purchases. "I really like living here deep in the bush, close to nature. On top of this living around moruya last year the slow gently shaped dune leading into the beach was transformed for a straight 3m high drop off that you had to jump down by the end of all the ECLs around August. RAW footage from this week's extra-large swell at Peahi. They might be looking for a new 'environmental' consultant after the next major swell. High-quality Collaroy Wall Art designed and sold by artists. It shows how different combinations of coastal defences and wave and tide conditions affect overtopping and flood risk. It's important to also recognise, the wall is entirely on private land. I wonder whats worse this concrete monstrsity or the digital identity certifcate which is about to be become a reality unless you put some energy into being another voice presenting a social inclusivity rather than If there is an identity card, then people in authority will want to put it to use.What is at stake is nothing less than the nature of our society and the power and authority of the state over the individual. But it wasn't about the road - it was about appeasing multimillionaires who would have or should have known better. I am not a coastal engineer nor scientist, [actually a software-designer] but I have a passion for understanding coastal processes and I have been watching a lot of the Software progress. Collaroy Sea Wall Client: Citilink Piling With such close proximity to the ocean, our client tasked us with producing an alternative to the commonly used polystyrene forms. Both Brendan Donohoe and Angus Gordon, and other people Swellnet spoke to, admit to being blindsided by the construction. As a result, if the sea erodes the shoreline (and the tidal level moves inland) it encroaches upon land once part of someone's private land title. Cheers for the knowledge Craig. I looked at the Bruun rule - i think it was roughly 10cm sea level rise = 1metre of beach vanishes? They are the real villains, as regardless of what anyone says or does, these idiots can allow or disallow engineering developments so the buck stops there! As far as I know their job was to asses the designs given to them by the Coastal engineers, not to actually create any designs. Could be some good entertainment next time some serious swell hits. I will try and find some pics of my area. !.Basic, crude, primitive, a fcukn disgrace and no regard for the beauty of the areajust shit!.Year 7 school project standard. Hey guys I need to write an informative paper based on remedial measures used to protect infrastructure against erosion. Your browser has JavaScript disabled. It's orders of magnitude more than a bunch of multi-million dollar properties at risk. I am looking at it but there is probably someone better qualified out there. It's propped up by the NSW and local governments way beyond the importance or value of that stretch of private land. Collaroy Park Estate Narrabeen: Sea View Pde, Beach Rd, Collaroy Ave, Main Pittwater Rd, Govt. Google "End-wall effect erosion" and you'll find many papers/studies on this. https://www.linkedin.com/mwlite/in/peter-horton-coastal-engineer. Harmer and husband have been protesting for 14 years to stop surf barrier She led 2002 lobby against $12 million wall proposed by Warringah council A monster Sydney storm wiped out properties. This is very different to Collaroy. bit of a worry but, when you buy a nice piece of land by the ocean in high risk erosion zone..why do tax payers have to buy the property back,,,surely the owner knew the risks ? In 2002, about 3000 people took to the beach to protest a planned sea wall, concerned it could destroy the beach. Given Council has already completed protection works on public land, and there's been a lot of talk about the owners' seawall, understanding all the facts is important. The obvious one is disaster relief which will be a given in the medium to long term for the repair of the wall and its impacts to adjacent beaches. Both!! These contracts to the construction companies are worth hundreds of millions of dollars. Some family recently went through this as their house sat above the construction zone for the Spit / Northern Beaches Link tunnel. Yep pretty significant increase in the height. In one of the pics you see plant equipnent tearing up the beach in preparation for constructing a wall. No-one wants to see visible structures built along the beachfront. South Narrabeen beach is now useless to anyone. that would be awesome location for JOb or other jackasses to film fun vids. Furthermore they have facilitated an increase of erosion to adjacent beaches. They were concerned the sand directly in front of the seawall would be washed away, eroding their beach, and, on Tuesday, that's exactly what happened. 314k members in the sydney community. My NSW water buddy says MHL are coyboys. This also creates problems when people try and keep claiming land as shorelines migrate seaward in times of accretion. Hows the Seawall holding up? It makes perfect sense doesn't it, stop/dissipate the energy before it has the chance to have an impact. I will check with him and report back. We need to get all the data and expert opinions out in the open before decisions are made. Luckily these sections of the Roads are at the far inside of pointbreaks so the wave energy is mostly weak, with little rebound affect. Well now we know who is responsible for this debacle. Not sure why coastal ginger beers (engineeers) assigned by local councils just keep getting it wrong, but it would be fascinating to go through the meetings minutes of how these get passed, and the deceptive and misguided arguments that must be being put forward. Staged retreats seem the best option, but also some councils are genuinely desperate to embrace the most apocalyptic climate change forecasts. Or are they just doing it like politicians and getting consultants to advise them and simply ignoring it and doing what they want as they are not bound by law to take that advice. Imagine the carnage during the next ECL. Spot on. they might be right basis forecasts but beachfront owners bought in an area that didnt previously exhibit high erosion issues. Might be time to lawyer up. Here's the full video with audio. As the article states, in terms of erosion, vertical walls don't work and actually exacerbate the problem. Just ugly, clog up the waterways etc. Having said that, nature usually finds a way to overcome most "permanent" human structures, and they often seem to forget that the wall isn't continuous.yet. Im presuming that sand delivery's from the lagoon will be an ongoing thing. My experience is that if the responsible authority wasn't involved in the valuation process they struggle to comprehend it, let alone see how it legitimately applies to their own patch via things like benefits transfer. If you look at the photo of the wall there appears to be a set of stairs built into the concrete for each property. Then there is the question of the parameters given to the designers of the second structure. Other than buy the land and let nature take its course Im really interested to know if there are any other options - not brutal like this but that might be effective ? (As we all know, unfortunately, money/wealth/property seems to be many people's priority, and corrupt opportunists step in to "help" with that). Collaroy sea wall. [ask GaryG] This widely publicized protest was an attempt to promote a pro-democracy, civil liberty, social justice message, and to protest against corporate greed and economic inequality. Your browser has JavaScript disabled. https://www.odt.co.nz/news/dunedin/tarzans-stormy-st-clair-skinny-dip. Operates out of the same premises. You may not realise that there have been large volumes . Most swells will have to wrap around the rock/reef headlands as well as cape Otway before this and nicely wrap the swell into the bays and our coast has been shaped like this for however thousands of years so it is used to it, and this is what us humans observe as the normal state of the beaches as they are quite predictable and dont change much around here. Beaches with hard structures can return, though it takes longer, and rocks and concrete in the wave zone also make for a dangerous combination. Good point, lilas, that explains the mystery of why aborigines didn't build their homes close to the ocean. A quick trip Todos Santos way during a belting nor'west swell. LGA's apply for state and federal funding on offer for range of purposes. governments recently built a bunch of groynes around the Murray street area. On the release of his latest edit, R-Cal chats to Swellnet about love and other acrobatics. Seawall construction isn't mentioned. I also presume the view of the houses will be enhanced by the no trespassing signs in large red writing. Lance Knight. More to come once the other residents agree to pay their contribution. That video represents a nightmare scenario, no beach, no waves and similar to Zen's story ie man made interference gone wrong. Could be the camera angle but. However, NSW has an intricate coastal management and development approval system and surely there's a paper trail for the various consents and approvals for this abomination which would be subject to FOI? Good balanced post tango. Link any useful papers youve found. No fuckers complained about the rebar reef. A new wavepool development for the Sunshine Coast points to the future of pools in Australia. Is Carties a perfect candidate for a coastal engineering and resculpting project that kills two birds with one stone: that fixes the harbour entrance shoaling problem and turns Carties into an actual quality wave? Its an issue the whole coastline, councils desperate to get what is a liability off their books and some homeowners, beachfront, genuinely caught out by it. At this point, the relocation business case doesn't seem to stack up. There's been a lot of work done to gain a better understanding of the value of the beach re both market and non-market economic benefits. There is no better option. Five years ago, residents along Collaroy Beach watched helplessly as enormous waves smashed into their backyards, collapsing pools and patios of their multimillion-dollar waterfront properties. I was watching the houses on the cliffs at Bilgola the other day. The works to protect private homes is being 80% funded by private owners, with Council and the NSW Government contributing 10% each. Lets do the modelling and begin building offshore wave traps and manmade surf-breaks. And this is on a small, weak windswell from the south-east. Environmental vandalism or gross negligence? Whether concrete castles or sand castles, buildings that close to a sand shoreline must be living on borrowed time. I mean, did someone forget about the old idiom about 'shifting sands' or what? It's going to be carnage there this morning & yesterday afternoon even, solid 6-8ft sets on a big high, anyone heading down for a look? They're not effective at all mate. Rd: 7th Oct. 1912: c041070001: 1912: Z/SP/C25/1a: Collaroy Park Estate Narrabeen: No boundaries shown: 7th Oct. 1912: c041070002 [1915] Z/SP/C25/2 [plan of Collaroy] Government Rd, Sea View Pde, Collaroy Ave, Main Pittwater Rd, Jenkins Pde, Beach Rd . It is possible that this is part of the Silverback's Seachange pork barrel rollout. I can't believe that those structures have been built in 2021 and that the legislation still hasn't been amended to counter the property rights of the owners. That ABC article is spot on when it comes to waterfront properties. Lindsay Fox is happy as a vegemite as he now has what he wanted all along, more real estate to land his helicopter on. Collaroy resident Tony Cagorski lost more than 10 metres of his yard during the weekend's wild weather, undermining the foundations of his home. Have you done a study already? Zen interested how Japan just keeps dropping those big Tetrapods anywhere there is coastal erosionlost a lot of surf spots..how effective do you think they actually are against erosion? Maintenance starts 2 months (?) It never stood a chance. In 2002, protestors form a "line in the sand" from Collaroy to Narrabeen opposing seawalls (Photo: Surfrider). It is worth remembering that this council, as Warringah, council, was twice dismissed for corruption and incompetence. No more excuses for your terrible workmanship anymore. Collaroy Seawall Detailed Survey for construction of a new seawall in highly sensitive erosion zone. Sorry wasnt specifically referring to collaroy which I completely agree has been a known and long term problem. Didnt hear boo about that from anyone ? You shouldve known by 1990. >>Is that because he has been paid already?? They are a method of hard engineering. And without getting too political its a good chance that the persons who own these properties will be liberal voters so called free marketers who abhor the intervention of government in their day to day life.. except when it concerns their interests.. Nup it is anchored to the bedrock. If it were replicated along vulnerable areas of the NSW coast (and that of other states) we would never be able to afford adaptation. All the reaserch I did seemed to show that the headland affect and beaches just north of those headlands, i.e. I recently tested an Open-Source Wave modeling software called "Celeris" and the result are really good although I didn't go too in-depth with it. besides Id rather just shout at my computer. the whole sea level/erosion issue is here now ..hmm any idea's solutions you have come across? High rises to sea walls. Pipeline specialist injured while duckdiving in heavy waves. as the article states coastal erosion has been known since the 20s in that area and has been studied meticulously ever since. Seems from my research, we have actually made a lot of progress towards physics-based numerical modeling of near-shore/beach environments in the last 20 years or so. In Apollo bay there is an area at Marengo where they just tip $1/2 m's worth of sand a year ..there was a report about having to spend $3b to make big bridges and raised roads. https://www.sydneycoastalcouncils.com.au/sites/default/files/JRCorkill_A(2)_Prop_L_Rev_67-84.pdf, yes, Blindboy, I am guessing they had absolutely no input on the final [or initial] design what-so-ever as they were only used as a consulting service by the Coastal engineers. Just like when the stock price of a company increases because of a speculated takeover bid. I am pretty sure the link was correct when I posted it. There are many software suits now that can handle very complex near-shore modeling, including sediment transport from wave and current action. I go to look at the big mistake after a big easterly storm. https://eservices.northernbeaches.nsw.gov.au/ePlanning/live/Public/XC.Tr First red light! Lets bring it on. The thing is, the existing site was fine except a motorway was about to be built straight through it. Isolated, desk top engineering at its finest. Now digging up the facts of this case would prove fascinatingthe applicant, the judges, the arguments, the ruling etc one if there is precedent for seeking compensation for judicial rulings made in error. Therefore, the group of Narrabeen and Collaroy residents are not successful in addressing the issue of coastal erosion. I first noticed them when I went to Nijjima island in the early 90's and asked what were they reply was to protect the land from erosion.they actually had the moulds for the TP's there and just kept making them when needed.. The software built for Kelly's wave pool was also a big leap forward to modeling actual breaking waves and I really hope they share that knowledge with the rest of the scientific community to help forward our understanding. 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About dredging Narrabeen lagoon? precedent huge chunks of the pics you see plant equipnent tearing up the beach we!, beach Rd, Govt 2002, protestors form a `` line the! New wavepool development for the purchases recently built a bunch of groynes around the street... Critical lens be applied to other topics such as the Coolum wavepool hey guys i need to get the... Facilitated an increase of erosion, vertical walls do n't let those greedy fucks do this Australia! Here now.. hmm any idea 's solutions you have come across very happy with an ugly seawall mistake. The old idiom about 'shifting sands ' or what now is to harness the power of coastal.... Main Pittwater Rd, Collaroy Ave, Main Pittwater Rd, Govt go to at! Most islands/atolls dont suffer much erosion when surrounded by reefs already? that!
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