Step 5: Construct the Seawall. My view is if it cannot be protected by environmentally sound methods then that is the owner's problem. Like Stockton, the Collaroy seawall has resulted in the loss of the beach immediately in front of the wall caused by the dissipation of wave energy. 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. Some relevant links from when I had a dig around before. Lance any surf info about Middleton Reef ? Lets bring it on. The wall is set to be seven metres tall, but three-quarters will then be covered by sand brought onto the beach. I've got a mate who works for MHL as a coastal engineer. From the last set of minutes from the Wamberal Seawall advisory Taskforce Nov 18 2021. But several of those areas experiencing recession are linked to important infrastructure that the authorities want to protect - depending on were you are, the GOR also houses telecoms, sewerage and other infrastructure. The council will be the lone 'interest'. This strategy had been used in other parts of the world where poor planning placed buildings too close to the ocean. >>Really dumb idea. As parts of the great ocean rd have began to crumble into the ocean. "Update from Council on possible site visit to Northern Beaches: Casey Johnston advised a site visit to Narrabeen-Collaroy is being canvased for early December 2021 to allow review of their seawall in construction. Also I'm suspecting at the lga level the up front investment to do this work can be a hard sell. 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. Good point, Lilas, but I think the issues around hard structures and beach environments have been established for so long and are so well known in the coastal management field that it's taken as read. It just doesn't make the engineering firms any money or contribute to gross state product under the current economic system. 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 . Tonights high tide is 1.34m, tomorrow morning is 1.96m. Newiie Harbour was pumping. The finished work is 100 metres long by 13 metres high. BB who is getting the sand which has gone from here? and the sick irony of the beach access sign detailing the seawall works with all "enquires to be made It pisses me off that people wilfully or ignorantly choose to buy in areas that are not for purpose, enabled by the property industry and then scream out for taxpayer help when the inevitable disaster occurs. Please include direct and indirect costs. Here's the full video with audio. Such a shame its job wasn't to conserve the beach and public access at the same time. Same stretch of sand - another wall to protect public assets - https://www.scs.nsw.gov.au/soil-conservation-services-projects/collaroy- Gary G has been erecting hard structures in the dunes around Victorian beaches for years. Is there a sea wall at Collaroy? "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. My understanding was that council were looking at a rock revetment as they'd given approvals to a couple of other DAs for rock revetments, says Gordon. Any system that affects the coast from a different angle upsets the balance of that orientation and the system then takes considerably more time to re-adjust. There are 11 parcels of public land (including the Collaroy carpark, South Narrabeen Surf Club, reserves and road ends) interspersed between 49 private parcels of land that require protection. "We have the Tools and imagination" Hey BD. Climate projections will have some Australian surfers rejoicing, and others not so. 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. processes currently-exported iron ore, bauxite, and alumina into green. Check this out. Just like when the stock price of a company increases because of a speculated takeover bid. What a mess. It breaks my heart. For the swellnet readers here's some background info, and here. Records show the DA for the Collaroy Seawall had been lodged 18 months earlier in July 2018. Not sure if that happened though. The Act was introduced by Rob Stokes, the NSW Minister for Planning and member for Pittwater. We need to get all the data and expert opinions out in the open before decisions are made. The most notable benefit of sea walls is that they provide excellent protection against coastal erosion and flooding. 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. The Collaroy wall is not subtle. " The properties were bought in good faith, said one local who wished to remain anonymous, and the owners must feel an obligation for the authorities to protect them, but a seawall is last century thinking.. But it wasn't about the road - it was about appeasing multimillionaires who would have or should have known better. The contractor is required to remove this temporary working platform and bund at the completion of the works, sieve the sand and remove all debris, and return the beach to its former state.. Its like stepping forty years back in time. Will try and find out. RAW footage from this week's extra-large swell at Peahi. Nature fights back. It's been seven years since the last, but the event has been called on off for this Wednesday - Hawaiian time. Thanks heaps for the update Craig. You said "They get paid to do what they are told to do" Were they told told to design a system that would not work for the purpose and only exacerbate the problem? "We haven't had a flood here for 20 years you say. Would suck if you got amalgamated into Northern Beaches council then had to pay tax for this. And ALL received in a 3 day period 17-19 July 2017. Though still in its early days, the reef - which cost $18 million - has maintained beach width since it was completed in 2019. "Environmental vandalism or gross negligence?". Wetsuits may never be the same again. Great article.. https://www.smh.com.au/property/news/coastal-properties-at-highest-clima @Craig Thats tens of thousands of homes). Get Pro. Initial reports claim Marcio Friere wasn't wearing an inflatable vest when he was held down in large waves. It might take a bit of digging to prove it, but the evidence is accumulating already. Will this mean sand depletion north and a build up south? The second DA is now here. 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. You have a decade of good conditions somewhere along the way and everybody builds on the beach or on a river bank and then there reminded of the risks being swell generated by a low and annual big tides in cyclone season who woulda thought ..or flooding by jingoes fuk wouldnt you rather walk an extra couple of hundred metres and leave nature to do what it does . stupid white poeple ..classic. For the most part I understand buybacks but, how will they appraise the value of these properties? They have just completed digging out a new path for the river to follow with excavators and every day Id watch the next morning after high tide their progress would seem effortless and the river would tend to follow the old direction. A quick trip Todos Santos way during a belting nor'west swell. Yamashita (2020) "Living together with seawalls: Risks and reflexive modernization in Japan". check out the beach erosion in Apollo bay as well >> and the ocean will wash it all away again in the next big swell. A band of knowledgable people have gotten together and are in discussions about it and coming up with arguments and alternatives against it. The above video might be of interest to help understand the design of the wall. https://nationalprecast.com.au/wp-content/uploads/2015/06/Collaroy-Beach 2020 Surfer keelhauled by Collaroy Stormwater Pipe {RIP} Google "End-wall effect erosion" and you'll find many papers/studies on this. https://www.facebook.com/watch/?v=144437777895204. If so, I presume it may slow around the reef, but then continue north on a more normal migration speed. 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. Hi Mark. The sooner we (as humans) acknowledge the nature of nature, and work with it instead of against it, the better for everybody. Japan may be a perfect case study. Narrabeen and Collaroy residents hold signs and protest their opposition towards the sea wall extension plans in November 2012 In November 2002, Harmer and Donohue led a protest against a $12 million sea wall, proposed by Warringah Council, with 3000 people linking arms along a 1.1km stretch of beach. 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. Furthermore they have facilitated an increase of erosion to adjacent beaches. Men sand-bag properties on Collaroy Beach Arlington Building and a run of houses to the north circa 1922. When the CBA or risk assessment work is done with good information about the things to be lost (eg the beach, public access, amenity, etc) it can shift the outcome of the analysis significantly, particularly the "do nothing" which is actually doing something. We have summarised some key facts about the first of the Collaroy owners' seawalls. As good as a house on the beach would be imagine how much more beautiful the East Coast would be with a 1km + building buffer from the coast depending on the terrain. By creating offshore reefs that only interact with the largest [damaging] swell events, the normal beach processes can be maintained by allowing small to medium swells to pass unaffected and continue the normal flow of sand. Separately at the Collaroy pool end of the beach when the walk way became unstable they just craned in these massive bags of rocks on top of each other and said job done - ugly as fuck. The seawall is probably built over them. So would you like to inform me as to WHO designed this monstrosity if it wasn't an Engineer? Seawalls have the inevitable effect of reflecting and concentrating wave energy and accelerating erosion. Structures appeared. Who could forget the MOLE building or the spoil from the North Head Sewage Works tipped over the cliff? I have the mhl report but cannot find the link again. Jeez. Brendan Donohoe says the . First and foremost they say It's for erosion control but as you've seen after 2011 they did pretty much sfa. It's going to be interesting to see how it holds up after this weekend/early next week with another round of resonably solid E/NE cyclone swell hitswho's going down to take more photos and show the aftermath?!! [happy to stand corrected on any of this] Sea level rise equation is based on the Bruun Rule to ascertain erosion in open coastal areas like Collaroy. "Once this is up it'll be a momentum for others to do it too," said Orth. For some it. When a hard structure is introduced to the equation we see an increase in reflective energy andturbulence, slowing the accretion of sandwhile also acceleratingerosion in storm conditions. Sounds like the beach will be off limits/ too dangerous to walk on for weeks until the NSW Beaches Council recovers the rusting rebarb & concrete waste scattered along the beach then? A northeast swell generated by ex-TC Seth off Queensland,. Yep totally agree. They have just invested in an asset that requires 60 years of maintenance. Not every beachfront owner is a cashed up prick, some have been there 50 years when climate change etc wasnt on the radar. Isolated, desk top engineering at its finest. Looks perfect for high tide backwash to spread up and down the beach. If you look at the photo of the wall there appears to be a set of stairs built into the concrete for each property. Has been for a while. Dont lynch me its only an idea. There's been significant coastal erosion (acute) along the GOR in recent years, though only a handful of places have experienced coastal recession (chronic). why should the taxpayer pay to protect a small number of private landholders who actively choose to profit from purchasing in a tidal zone? 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. @yeti. In the end it's all pretty simple though, as most beach erosion of consequence is caused by large/powerful waves. This would reduce the lateral movement of sand along this stretch of beach, reducing the natural erosion while creating some great banks. Again this can only be taken as opinion without proper scientific references. Not to mention the many brutalist houses dotting its once beautiful headlands. https://lighthouse.mq.edu.au/article/september-2021/Living-Seawalls-in-g 5 min [P] Call of the Wild skinny dip at yer local Sea-Walljust doing wot comes natural! 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. And it was created many years ago when coastal property was much lower in value and the bang for buck was much higher. For example, during sunny conditions in Collaroy beach, constructive waves transport eroded sediments from cliffs and headlands to build up the beach. There have been high profile storms on the NSW East Coast since the mid-70s. It looks like Chernobyl. Therefore, the group of Narrabeen and Collaroy residents are not successful in addressing the issue of coastal erosion. The State Government essentially provided the compensation for the business to relocate to another 'suitable' site. If you don't know know shit about the processes of the ocean and coastal erosion then please put your hand up and say so. It's a travesty in so many ways and a very poor precedent for other parts of the coast which will be deemed vulnerable to sea level rise. Coastal property was much lower in value and the bang for buck was much higher thousands of homes ) an! A hard sell member for Pittwater 1.34m, tomorrow morning is 1.96m of beach, the... It can not be protected by environmentally sound methods then that is owner! Too, '' said Orth it can not find the link again since... Issue of coastal erosion and flooding and the bang for buck was much in! North on a more normal migration speed Rob Stokes, the NSW Minister for and! 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