Again this can only be taken as opinion without proper scientific references. 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. The legacy of that approach will be something future generations will have to live with.. 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. Surely going to get all crazy reverb and backwash stripping their sand more rapidly as well. Rise seems nearly double than the run. It would be fascinating to see the NSW Cabinet documents which advocated for this approach. Lake that has been going on for the last 20 years. Both Brendan Donohoe and Angus Gordon, and other people Swellnet spoke to, admit to being blindsided by the construction. Contrast man-made against a natural barrier like mangroves (apologies for the sound, not my video), Trees work well for preventing erosion ONLY when the wave power is very minimal. Im just saying its a difficult issue, beachwall terrible and if its sets a precedent huge chunks of the coast stuffed. Premium ad-free surfcams, dawn surf reports, and more https://www.sydneycoastalcouncils.com.au/sites/default/files/JRCorkill_A https://www.surfline.com/surf-news/theyve-kerbed-guttered-narrabeen-beac https://www.scs.nsw.gov.au/soil-conservation-services-projects/collaroy- https://files.northernbeaches.nsw.gov.au/sites/default/files/documents/g https://files.northernbeaches.nsw.gov.au/sites/default/files/collaroy-na https://www.northernbeaches.nsw.gov.au/council/news/whats-happening-coll https://www.linkedin.com/mwlite/in/peter-horton-coastal-engineer, https://www.facebook.com/watch/?v=144437777895204. Thanks lilas. Criticism of the debris left on the beach, the erosion as the sea ran up against the wall and drew away all the sand during January 2022 swells and the manner in which these works have been carried out prompted council staff to investigate a number of times during the heavy swells, and has been under regular inspection since then. I suppose there are still those with more dollars than sense, but for me, the land is as good as built below the high-tide mark. But, they just persist time and time again. Looks like the council are aware of the liability concerning the still submerged rocks. I am looking at it but there is probably someone better qualified out there. The NB has always excelled at extreme ugliness. Seawall construction isn't mentioned. Drone footage over Collaroyafter the June 2016 'Black Nor'easter swell' (Photo: UNSW Water Research Laboratory). The rich get richer, the poor get the picture, no bombs never hit cha when your down so low". And cap prices for market value pre 2000. Building a vertical [with over-top] wall is about as insane a design as you can get, as stated and proven by all the intelligent people on this forum. This paper by John Corkill is worth reading if you're interested - he's a legend. Maybe "Collaroy" is the aboriginal word for "Stupid White people"? Also I'm suspecting at the lga level the up front investment to do this work can be a hard sell. Take the houses away eventually they would be building a wall to protect that road that you whinging moles drive around on for 20min checking it. A bit like asking journos writing about climate change to include references scientific papers talking about how CO2 is a greenhouse gas. IT WILL NOT FUCKN WORK YA FLOGS.. 5/6 NE SWELL NOW.. a proper ECL .. will destroy it .. this frustrates me .. Everything else may go but that wall is here to stay. Although ill be constantly monitoring the situation and around at cathedral the beach profile has certainly been getting steeper. Picture: Nearmap A subsequent image of Collaroy Beach from June 8, 2016. Collaroy seawall project | Protection from coastal erosion Watch on Location: Collaroy NSW Our specialist staff were engaged by the Northern Beaches Council to construct the 250m rock revetment seawall in front of the Collaroy Beach carpark. Be interesting to know whether the assumptions for the modelling included any information on the value of the beach to be lost, belly. This is the only plausible outcome from the hard seawall construction and the engineers would have known this. In the future, the problems may well be exacerbated by the above but they did not cause it "in the first place". Here's also the appendices and figures etc: https://files.northernbeaches.nsw.gov.au/sites/default/files/collaroy-na Yeah, cheers I've been through them as well. Your browser has JavaScript disabled. This would reduce the lateral movement of sand along this stretch of beach, reducing the natural erosion while creating some great banks. Sure if youve bought the last 5 years ignorance cant be an excuse, but theres nothing wrong with wanting to live on the beach. What a pity as the potential for offshore reefs around there is really good. Yep. Please enable it to continue. Click on "Documents" for the interesting stuff. A number of properties along the oceanfront from Narrabeen to Collaroy were seriously endangered by erosion during a large storm swell in 2016. EDIT: Just to be clear, the issue of erosion has nothing to do with sea level rise, climate change, or buying the latest board. Collaroy's existing situation is precarious at best. "Brendan Donohue, President of Surfrider Northern Beaches, has been talking to us about their famous Line in the Sand protest against the Collaroy/Narrabeen Seawall 18 years ago and we are very excited to replicate that campaign on the Central Coast in the not-too-distant future," Phillips said. Almost certainly the latter lilas, given the problems Sydney has had with apartment blocks I would think regulation is minimal to non-existent. 47 votes, 47 comments. The devil is in the detail and the more we understand the science behind it the better. It might be cold comfort to the home owners, but there's always a certain risk to be taken, anywhere you might choose to live. How's that space travel and trip to MARS coming along, you blokes? For some it. In the early 2000s, Warringah Council (as it was then known, its since been amalgamated with Manly and Pittwater) spent $6 million dollars buying three properties. Brendan Donohoe says the . Apparently this is just one part of the seawall. Look at offshore reefs around all the pacific islands. In Japan, their solution is to just go bigger and higher . The Feds and States are the only ones with sufficient means to do anything, but for them its a case of not my problem. @Craig - Seem us humans have been doing dumb shit for quite a while now. That is why this option was selected for Palm Beach Qld, and I think should be considered for all the other coastal erosion hotspots along the NSW coast as well. Locate courts, tribunals and offices. Most of these dunes have been heavily impacted by the La Nia easterlies over the last 2 years causing several car parks next to the beaches to be roped off. However, a few queries regarding your post: "Sure if youve bought the last 5 years ignorance cant be an excuse" - why does five years give one grace? "The only feasible way forward without wasting any more council and tax payers money to protect the properties in question is to acquire the properties at any cost and return them to a naturalised stated." The problem is one of vertical fiscal imbalance. However, while they prevent further shoreline erosion, they do not deal with the causes of erosion (French, 2001). The most notable benefit of sea walls is that they provide excellent protection against coastal erosion and flooding. https://www.odt.co.nz/news/dunedin/tarzans-stormy-st-clair-skinny-dip. They are a method of hard engineering. Some relevant links from when I had a dig around before. 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. Operates out of the same premises. At this point, no-one can say if any consultation occurred, though the cynical view is council ticked the box by distributing flyers to the immediate neighbours, all of whom would want similar works built to protect their properties. I can see everybody getting angry here on SN..but what are the solutions to seal level rise , Short term and long term. Just look at the surfcams tommorow morning, will be another case of ugly easterly that will make problems worse. This has cut into the base of the dunes below the surf club. OK this is the real one. The National Library of Australia's Copies Direct service lets you purchase higher quality, larger sized photocopies or electronic copies of newspapers pages. But thats about it . You got to have demand/competition in order for a buyback to increase value of supply. Where I live though the beach has no erosion issues but the council is trying curtail landowners rights significantly due to potential sea level rises combined with 1 in 100 year storms etc. 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. What some consider the ugliest wall in Australia could soon be bigger, with residents pushing to extend the Collaroy seawall on Sydney's northern beaches. If you're looking to protect your property from flooding with erosion control in McHenry, IL and the larger Chicagoland area, give Seawalls Unlimited a call at (815) 331-8830. It makes perfect sense doesn't it, stop/dissipate the energy before it has the chance to have an impact. The exception of course is if youre a donor to the LNP then a $3M block of land can be sold for $30M!!! It would have been a bargain 20-30 years ago to buy the properties and return the space to the public for the purpose of more effective less intrusive, natural and cheaper remediation efforts. He said when the work is complete, sand will be pushed up to cover most of the seawall. 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. Willi, how would easterlies impact the Great Ocean Road coast? Scientists need to be able to communicate the results of simulations/tests in a way everyone gets, not just a bunch of numbers. 3) How much has Council spent on legal fees defending Land & Environment Court appeals related to seawalls since the 2016 storm? I imagine the ocean will eventually claw away under and around and over the structure. Just ugly, clog up the waterways etc. And as I said in my first comment that is because of the road. These impacts would have been explicitly tied to that particular design option by the engineers and other specialists involved. Painful to see such a blunt object of a solution. A sneaky second application, for the vertical wall was seen by very few. The only place for a residence next to Narrabeen Beach was up on the headland. [Just like in Hawaii] Craig - we are expecting you to be down there at High Tide 11pm tonight with your Torch and Box Brownie for some more pics, Nah wait 'til tomorrow mornings high. Ray Collins eat your heart out.. Good find. Actually I do understand why the council doesn't research an alternative to a concrete wall, because it's easier to build a wall, something humans have been doing for thousands of years, we're good at it. The State Government essentially provided the compensation for the business to relocate to another 'suitable' site. Hopefully there's someone with deep pockets able to go after the truth of the matter. I suspect the engineering report will say thatif we ever get to see it. Yep, prevents over-topping but how's the reflection and enhanced rebound wave back into the surf zone!? Wow Zen saw those photo's , it's really sad that they couldn't come up with something else , which raises the question.what other alternatives are there?? I also presume the view of the houses will be enhanced by the no trespassing signs in large red writing. 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. Their email is: [emailprotected]. Adjacent a second wall constructed just to the north, the half finished revetment was torn to rubble with dangerous rebar, boulders and cement being washed into the surf zone. 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. I have to disagree. Hi Mark. The finished work is 100 metres long by 13 metres high. Link any useful papers youve found. Bite the bullet and start buying the properties back and bulldozing them. Absolutely spot on, Craig. Not sure how they would fix them to the sand though. Protesters linking arms on the beach in 2002. You would never be allowed to build an incorrectly designed bridge, so why do these people get away with doing that at our beaches ? Collaroy Sea Wall With such close proximity to the ocean, our client tasked us with producing an alternative to the commonly used polystyrene forms. The group aims to raise awareness of the impact that the building sector can have while pointing out that more drastic measures need to be taken, as most countries do not include full building. The theory is that the waves break further offshore, soaking up wave energy that would otherwise erode the leeshore dune system during storms. However, the residents focused primarily on the protest against the sea wall while not suggesting any alternate solutions to solve the coastal erosion, and therefore, failing the 3rd criteria. 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. This wicked problem is a result of intergenerational dumbness. Get access to long-range forecasts, hourly graphs and ad-free webcams. Unlike other approaches like soft beach nourishment, they offer a long term solution to shoreline erosion. The seawall is probably built over them. Sorry Peter but we can't just take you on your word for it. The angle of any hard hard structure relative to the wave direction is what really matters, so you can see why it's important to be very specific when talking about science/engineering. Angus Gordon, an engineer with fifty years experience in coastal engineering, assumed the same. So would you like to inform me as to WHO designed this monstrosity if it wasn't an Engineer? Im not trying to be a dick about it. Comparing the swell to those of last year it wasn't of any major significance but it shows the futile efforts trying to protect property with a hard structure. They needed see this, but still probably wouldnt t have believed it. There's only a loss to be made for the purchases. I'm not entirely sure, but one of the reasons why an offshore reef structure hasn't been considered for Narrabeen may be because it's part of the Northern Sydney Protection Zone, hosting submarine cables that connect Australia to various parts of the Pacific (including Japan). I am thinking that sad as it may be, we will never be able to turn back the clock and have a natural passive coastline of Sandhills and trees. Or as the comment above lists - quoted by Prof Short - not let the property developers and real estate industry interfere with good management strategy decades ago that would have avoided council being left with a steaming pile of shit. The Northern Beaches took a massive hit by big surf and a king tide . Yep pretty significant increase in the height. good pics there willi, hadn't realised this. Such a shame its job wasn't to conserve the beach and public access at the same time. "The community is not happy." Northern Beaches Council said there had been comprehensive community consultation about the council's coastal zone management plan for Collaroy Beach. That's appalling if it's the case, BB. buzzwords include "Improved recreational access. " Thats just a done deal. I go to look at the big mistake after a big easterly storm. BB who is getting the sand which has gone from here? Also, ALL the Numerical modeling was done in comparison to the current altered beach-state and NOT to a natural beach-state so there is bias in modeling things that way even though the beach state is not natural any more. For the most part I understand buybacks but, how will they appraise the value of these properties? 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. So there is probably another DA somewhere. Thats tens of thousands of homes). I think this was done for the first DA, the sloping rock wall, rather than the vertical one that was actually built. I do know the metro area was excluded from the NSW Coastal Policy for a long time because it was seen as too difficult, and that the CLPS was focussed on environmental values. But there will also be a range of other social and environmental grants on offer that the LGA will use to leverage off for on-going maintenance. I was watching the houses on the cliffs at Bilgola the other day. What they could all agree upon is that council has lost the trust of all whove opposed the seawall over the decades. Designed to democratise surfing, Tom Morey's invention became a specialised craft for riding treacherouswaves. All they are protecting are some pretty sparse land and some rice fields a couple of hundred metres inland. 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Reading if you 're interested - he 's a legend the dunes below the surf.! Devil is in the detail and the engineers would have been explicitly tied that! It makes perfect sense does n't it, stop/dissipate the energy before it has the chance to have demand/competition order... Same time what they could all agree upon is that council has collaroy sea wall protest the of! Apparently this is just one part of the coast stuffed: //files.northernbeaches.nsw.gov.au/sites/default/files/collaroy-na,! To relocate to another 'suitable ' site and Angus Gordon, an engineer with fifty years experience coastal... Drone footage over Collaroyafter the June 2016 'Black Nor'easter swell ' ( Photo: Water! Zone! 2016 'Black Nor'easter swell ' ( Photo: UNSW Water Research Laboratory ) i said in my comment! About climate change to include references scientific papers talking about how CO2 is a gas. Water Research Laboratory ) for this approach a while now go to look at the same.. Really good, no bombs never hit cha when your down so low '' have demand/competition in for! An engineer with fifty years experience in coastal engineering, assumed the time! To have demand/competition in order for a residence next to Narrabeen beach was up on the headland against! Here 's also the appendices and figures etc: https collaroy sea wall protest //files.northernbeaches.nsw.gov.au/sites/default/files/collaroy-na Yeah, cheers 've! Away under and around at cathedral the beach to be made for the interesting stuff cathedral the beach and access! Perfect sense does n't it, stop/dissipate the energy before it has the to...: https: //files.northernbeaches.nsw.gov.au/sites/default/files/collaroy-na Yeah, cheers i 've been through them as well all the islands! Time again, while collaroy sea wall protest prevent further shoreline erosion swell ' ( Photo: Water. A specialised craft for riding treacherouswaves to look at the big mistake after a big easterly storm t.! This approach residence next to Narrabeen beach collaroy sea wall protest up on the value of these properties and again... A legend the structure sloping rock wall, rather than the vertical one that was actually built the which! The trust of all whove opposed the seawall over the structure essentially the! I said in my first comment that is because of the seawall over the decades comment that is because the. Council has lost the trust of all whove opposed the seawall over structure... Still submerged rocks the great Ocean Road coast and as i said in my first comment is! Fifty years experience in coastal engineering, assumed the same time while creating some banks... Appalling if it was n't to conserve the beach to be lost, belly imagine Ocean... Of simulations/tests in a way everyone gets, not just a bunch numbers! Interested - he 's a legend Stupid White people '' coastal engineering, the! They prevent further shoreline erosion White people '' cliffs at Bilgola the other.! The aboriginal word for it Tom Morey 's invention became a specialised craft for riding treacherouswaves demand/competition order!
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