Almost a billion tons of the stuff is stacked in Central Florida [source: EPA]. Then, fill the rest of the sinkhole with clay sand and top it off with a layer of topsoil. The channels subsequently help to create underground basins known as recharge areas. Debris carried into the developing sinkhole may plug the outflow, ponding water and creating wetlands. Sinkholes can be natural or man-made and they normally start forming a long time before they actually happen. In some cases, the flow can be captured and used as a source of water for irrigation or other purposes. Clean the area. Rain and runoff water gradually percolate through crevices in the rock, dissolving it. Sinkholes from Large Debris in the Yard These three scenarios have different causes, but the solutions are the same. (Nov. 10. A dissolution or solution sinkhole is essentially a deep impression in the ground. Some individual state geologic surveys track reported collapses within their state. Part 1 Measuring the Sinkhole 1 Monitor the hole to see if it grows. Knowing the locations and types of pipes and easements will help you determine if the pipes are indeed responsible for the depression, and if they are, who is responsible for repairing the damage. In some cases, the cover can support its own weight but crumbles when additional weight, whether from a hapless person or car, passes over it. (Nov. 10. A sinkhole is an area of ground that has no natural external surface drainage--when it rains,the water stays inside the sinkhole and typically drains into the subsurface. . If the affected area is large, you may want to hire a landscaping or drainage company to do the work. Seascape photography guide: How to photograph beaches and coastlines, Scientists find strange underwater volcano that 'looks like a Bundt cake', China finally admits its hibernating Mars rover may never wake up. (Nov. 10. Environmental Graffiti. A less noticeable, much smaller sinkhole can also do its fair share of damage, wreaking . Before planting, you may want to lay down a few inches of topsoil or potting soil above the filled area. Cenotes often form gorgeous swimming spots and feature underwater caves, waterfalls and other intriguing formations. Many of these sinkholes then become ponds, as the water has nowhere to drain. A lock () or https:// means youve safely connected to the .gov website. (Nov. 10. 2008) http://ga.water.usgs.gov/edu/sinkholes.html, "Sinkhole Flooding." Aug. 26, 2008. 2008) http://www.uky.edu/KGS/water/general/karst/sinkhole_flooding.htm, "The Sinkhole." c. degrading organic matter to form humus. Sinkholes may develop slowly as small depressions in the earth or suddenly as a ground. When you purchase through links on our site, we may earn an affiliate commission. These are areas of land with water-soluble bedrock, such as gypsum and limestone. One notable, tragic case of this type occurred in Guatemala's capital, Guatemala City. 2008) http://www.latimes.com/news/opinion/commentary/la-oe-rooney28 mar28,0,2169993.story?coll=la-home-commentary, Shalev, Eyal, Lyakhovsky, Vladimir and Yechieli, Yoseph. Sinkholes typically develop slowly as bedrock is whittled away by water turned acidic from absorbing carbon dioxide and interacting with plants. Are there geologic maps or publications for where I live? Since homeowners commonly call them sinkholes, we will also. 2008) http://www.mountgambiertourism.com.au/home.htm, "Sinkhole." First Step: has 1 heading "Do you like fruits?" + Has 2 radio input with label "Yes" and "No"+ 1 Next btn. In areas where cover material is thicker, or sediments contain more clay, cover-subsidence sinkholes are relatively uncommon, are smaller, and may go undetected for long periods. Over time (even thousands of years), this process can enlarge natural pores and cracks in the bedrock. Pennsylvania Department of Environmental Protection. A sinkhole can range anywhere between a small depression in the ground and a gigantic hole reaching down to at least 500 meters. When rainwater or ground water comes in contact with CO2carbonic acid is formed which can dissolve sections of bedrock especially the weaker sections. U.S. Geological Survey Karst Interest Group Proceedings, October 1920, 2021, Karst in the United States: A digital map compilation and database, National Cooperative Geologic Mapping Program, Geosciences and Environmental Change Science Center, Ohio-Kentucky-Indiana Water Science Center, Karst topography; computer animations and paper model, Development of sinkholes resulting from man's activities in the Eastern United States. Like all sinkholes, the one in Guatamala City formed when a swath of land collapsed, leaving behind a crater-like depression in the ground. If you believe there is an abandoned well or cistern on your property, call the County Health Department at 703-246-2435, TTY 711. Take our Groundwater True/False Quiz and find out. Any interactives on this page can only be played while you are visiting our website. In addition, if vegetation is dying unexpectedly, a sinkhole may have disrupted underlying streams that usually feed the plants. Quiz icon made by mynamepong fromwww.flaticon.com, Want to learn more about sinkholes? Sinkholes largely occur in areas known as Karst Terrain. "Venezuela's Tepuis." March 11, 2006. In either case, do not try to make repairs yourself. There are more than 2,000 cenotes on the Yucatan, and they are a main source of fresh water for people there. Early in the morning on Feb. 23, 2007, a 330-foot (101-meter) deep sinkhole appeared almost instantly, killing at least three people and devouring homes in a packed urban area. National Geographic Society is a 501 (c)(3) organization. Others erode from the surface when easily dissolved rocks are exposed to rain and wind. Research in Review. A severe sinkhole found on public or private land may have to be repaired with concrete or require earthmoving equipment to stymie erosion. Heres how it works. If you do not have a copy, one can be obtained from the Zoning Permit Review Branch at 703-222-1082, TTY 711. 2008) http://www.depweb.state.pa.us/sinkholes/cwp/view.asp?a=3&Q=503856, "What if I do have a sinkhole?" Though often considered a benign nuisance, sudden, catastrophic collapses can destroy property, delay construction projects, and contaminate ground water resources. How Do MASSIVE Sinkholes Form? What is one way sinkholes can form apex? Fortunately, there are some warning signs that you could be standing in a sinkhole waiting to happen. CAIP and University of Florida. 2008) http://www.depweb.state.pa.us/sinkholes/cwp/view.asp?a=3&Q=503863 &sinkholesNav=|, Anderson, John Ward. Sinkholes are often funnel-shaped, with the wide end open at the surface and the narrow end at the bottom of the pool.Sinkholes vary from shallow holes about 1 meter (3 feet) deep, to pits more than 50 meters (165 feet) deep. Form 943, is the Employer's Annual Federal Tax Return for Agricultural Employees. These sinkholes have been treasure troves for scientists, who remain fascinated by the unique plant and animal species found nowhere else but in some Sarisarinama sinkholes. The limestone will dissolve gradually, eventually leaving a void. Sinkholes can open up in the middle of busy streets or in neighborhoods, especially during heavy rainfall.The land surrounding the Dead Sea in the Middle East is prone to sinkholes because of the prevalence of rock salt, which is easily dissolved by water. These sinkholes usually have a thin overburden (if any), which washes away or is eroded. Sinkholes can form naturally by the gradual percolation of surface water through layers of highly water-soluble or porous rock. The range and complexity of landforms and groundwater flow systems associa, This report describes new digital maps delineating areas of the United States, including Puerto Rico and the U.S. Virgin Islands, having karst or the potential for development of karst and pseudokarst. "5 Giant Sinkholes That Devoured Everything Around Them." Water can drain through a sinkhole into an underground channel or a cave. Visit our corporate site (opens in new tab). Repeat step 3 using the second dropper bottle and a new piece of pH paper. Often a sinkhole develops in a large open area of a lawn or garden. Do not just look at the construction aspects or the beauty of the home and surroundings. Various remedies have been proposed, including multibillion-dollar canals connecting the Dead Sea to the Mediterranean or Red seas. Authorities later attributed the bridge collapse to faulty design and the gradual addition of more weight, such as concrete lane dividers, without upgrading the bridge's support systems. Somesinkholesare caused by leaky underground pipes (talk to your utility company) and some areold construction pitsor other buried materialsthat havesettled. Groundwater moving through the subsurface can erode the rock over time, leaving cavities and open tunnels. Ensure the hips and shoulders rise at the same rate. What is a Flood and What Causes Flooding? Cover-subsidence sinkholes tend to develop gradually where the covering sediments are permeable and contain sand. Millions of cubic miles of water exists in the ground. Tornadoes only form when a thunderstorm has a particular combination of winds. How deep is it? The soil or sand over the bedrock collapses into a sinkhole when it is no longer supported owing to the cavernous space below. The ground shook and a terrible smell wafted from the ruptured sewer lines that, along with rain, were thought to have caused the disaster. In fact, most caves are produced in this manner. The poorly compacted soil settles over several years, causing a hole or shallow, linear trench on the ground surface. It can be just a few meters across or large enough to swallow a whole building. There is water somewhere beneath your feet no matter where on Earth you live. It absorbs carbon dioxide and reacts with decaying vegetation during the process. (Nov. 10. The eventual collapse of the surface may occur within a few minutes or several hours. Some of these sinkholes contain well-manicured, terraced gardens. Stay up to date on the latest science news by signing up for our Essentials newsletter. She or he will best know the preferred format. These sinkholes, often only a few feet across and deep, are smaller than many others because after reaching a certain size, sand and sediment pour into the hole [source: Southwest Florida Water Management District]. A sinkhole usually forms by erosion caused by frequent exposure to water. "Sinkholes." Those sudden sinkholes are usually the ones that open up and swallow buildings and cars. These leaks generate the. The conservation district can also help you determine if you have an easement on your property. Within a couple weeks a 23-meter (7-foot) deep lake had formed in the sinkhole, and a 2-meter (7-foot) alligator had taken up residence in the waters. True sinkholes are formed in areas with limestone rock and karst geology, which can be found elsewhere in Virginia, but not in our region. The principal causes of land subsidence are aquifer-system compaction, drainage of organic soils, underground mining, hydrocompaction, natural compaction, sinkholes, and thawing permafrost. A sinkhole can form on the surface when a cave ceiling collapses from gravity. I created a simple multistep form where. We grew up either in big cities where there was a public water supply, or in small towns or on farms where the water came from wells. Sink holes As the limestone Rocks prevent even compaction of the yard. These three scenarios have different causes, but the solutions are the same. Some are shaped like shallow bowls or saucers whereas others have vertical walls; some hold water and form natural ponds. A sinkhole is a hole in the ground that forms when water dissolves surface rock, Chemistry, Earth Science, Geology, Geography, Physical Geography. Such a collapse can have a dramatic effect if it occurs in an urban setting. All 50 States contain rock, A cave is a natural opening in the ground extending beyond the zone of light and large enough to permit the entry of man. National Geographic News: Sinkhole Holds Clues to Early Americans, National Geographic Magazine: Maya Water World, National Geographic Video: Sinkhole Swallows Hiker. 2008) http://www.swfwmd.state.fl.us/hydrology/sinkholes/, "Sinkholes." If you think the sinkhole may be contaminated, as may be the case with old underground storage tanks, contact the Fairfax County Health Department (703-246-2411, TTY 711) and/or an environmental remediation firm. However, if you experience something like a sudden drop in well water levels, you should get out of your home immediately, contact your local emergency management organization and then your insurance company. Water can drain through a sinkhole into an underground channel or a cave. One of the worst human-caused sinkholes occurred in 1994 in Polk County, located in Central Florida. Sinkholes can also form when natural water-drainage patterns are changed and new water-diversion systems are developed. Cover-collapse sinkholes may develop abruptly (over a period of hours) and cause catastrophic damages. Nov. 16, 2004. Water in the ground keeps all plant life alive and serves peoples' needs, too. The cavity migrates upward by progressive roof collapse. Copies of plats are often included in residential loan closing documents. Landscaping companies should be able to do most jobs. Sinkholes are a product of solution-erosion processes and are analogous to valleys carved by rivers in areas underlain by insoluble clastic rocks. Privacy Policy . Thunderstorm: Formation, Types and Effects, 5 Ways to Power Your Eco-Friendly Home with Renewable Energy, Copyright 2023 Earth Eclipse . Below are other science topics associated with sinkholes and land subsidence. (Nov. 10. Do you think you know about groundwater? The processes of dissolution, where surface rock that are soluble to weak acids, are dissolved, and suffusion, where cavities form below the land surface, are responsible for virtually all sinkholes in Florida. If the County does not have a copy of your plat, contact the lending institution from which the mortgage was obtained. You can't see it, but not only is it there, it is always moving around -- mostly downward, but also horizontally. Essentially, more water appearing in the system dissolves and creates an underground cavern. In these areas the formation of underground cavities can form, and catastrophic sinkholes can happen. It usually is not possible to determine the exact cause without excavation, but pieces of the old utility are sometimes visible within the sink hole. This report explores the role of science in defining and understanding subsidence problems, and shows that the optimal use of our land and water resources may depend on improved scientific understanding to minimize subsidence. This year, groundwater levels in many wells in Californias Central Valley are at or below historical low levels. While the USGS studies the types of rocks thatcan potentially form sinkholes, we dont investigateindividualsinkholes on private property. Consequently, the water that reaches the bedrock is acidic. Tourists who are unaware of sinkholes and even scientists studying sinkholes have been injured by falling into them. They happen for many reasons; read on to educate yourself about sinkholes. Bend your knees to come into tabletop position with legs bent at 90 degrees, knees stacked over hips. Sinkholes rarely happen, but when they strike, tragedy can occur. 2008) http://realtravel.com/muscat-journals-j4591693.html, "What causes a sinkhole?" Subsidence detection and mapping done by the USGS is needed to understand and manage our current and How much do you know about the water below your feet? The most obvious signs that the hole is impacting your house include the following: Sinking, sagging, or cracking walls. About Us, Goli Apple Cider Vinegar Gummy Vitamins - 60 Count - Vitamins B9 & B12, Gelatin-Free, Gluten-Free, Vegan & Non-GMO, OWOFAN Kitchen Faucet with Pull Down Sprayer Industrial 1 Handle 1 Hole Or 3 Hole Faucet for Farmhouse Camper Laundry Utility Rv Wet Bar Sinks, Stainless Steel Brushed Nickel, Limestone and Karst: What Deep Time Can Do, Brushed Nickel Pop Up Sink Drain with Overflow, Bathroom Faucet Vessel Sink Drain Stopper, R. Crumb's Carload O' Comics : An Anthology of Choice Strips and Stories : 1968 to 1976, Single Handle Deck Mount Bathroom Vessel Faucet Retro Brass Tall Spout Bath Tub Mixer Taps Bathtub Faucet (Type A). Summer 1996. Land subsidence is a gradual settling or sudden sinking of the Earths surface owing to subsurface movement of earth materials. In these cases, the water flow cannot be stopped, but it can be controlled. This sinkhole attracts many tourists to its shimmering, translucent blue-green water. Be sure to consider the environmental cond, 12201 Sunrise Valley Drive Reston, VA 20192, Karst in the United States: A Digital Map Compilation and Database, How the U.S. Geological Survey Monitors Water, Ohio-Kentucky-Indiana Water Science Center. 2008) http://www.environmentalgraffiti.com/offbeat-news/5-giant-holes-devoured-everything-around-them/1196, "13 of the Biggest, Strangest, and Most Devastating Sinkholes on Earth." An official website of the United States government. These types of sinkholes can be caused by various human activities, including groundwater pumping and construction activities. This inflow of sediment can block the outflow of water by stopping up the cracks and passages that connect the sinkhole to underground conduits. When the rock is unable to support the ground above it, the ground collapses. A sinkhole is a depression in the ground that has no natural external surface drainage. Namely, in some underground voids, water could actually be holding up some thin overhang of the earth. Sinkholes vary from shallow holes about 1 meter (3 feet) deep, to pits more than 50 meters (165 feet) deep. Disclaimer. But other times, sinkholes may be difficult to detect -- for example, if they're still covered with a thin overburden that has yet to collapse into the void below. Essentially, a sinkhole is any hole in the ground formed by erosion and the drainage of water. Acidic rainwater seeps through the ground and reaches soluble bedrock (usually salt, sandstone, or a carbonate rock such as limestone). Abandoned wells and cisterns were sometimes backfilled before they were abandoned. Previously, detailed investigations of sinkholes were limited to Alabama and Missouri, with the most comprehensive being in Alabama. Step #2: Leave Your Impacted House Immediately. We grew up either in big cities where there was a public water supply, or in small towns or on farms where the water came from wells. In May 2008, a large sinkhole formed in Daisetta, Texas, a suburb of Houston. The deeper the hole and the steeper the walls are, the greater the danger of collapse. Go to (1) Sinkholes from Large Debris in Yard | (2) Sinkholes Near a Buried Pipe | (3) Underground Flow or Spring | (4) Old Wells and Utilities. Moving groundwater is an important part of the water cycle. If you have questions about how to cite anything on our website in your project or classroom presentation, please contact your teacher. (Nov. 10. Step #2: Leave Your Impacted House Immediately. Rainwater obviously plays a role, but unseen water also matters. An official website of the United States government. Sinkholes also form when the roofs of caves collapse. More than 80 percent of known land subsidence in the U.S. is a consequence of groundwater use, and is an often overlooked environmental consequence of our land and water-use practices. Sinkholes can form slowly, at a snail's pace, or collapse suddenly like a bolt of lightning. Plant seeds or use your choice of landscaping. . The cavity caused by any of these can be hazardous, particularly for a child. The following human actions can also cause sinkholes: Sinkholes may also form in places where water flows regularly, such as a storm drain, or when water sources are diverted or cut off, especially by pumping out groundwater. A landscaping company experienced in using a grinder tool should be able to perform this operation. "The looming sinkhole crisis." The First Pull. How long would it take your house to completely fall apart. Nov. 7, 2008. If a media asset is downloadable, a download button appears in the corner of the media viewer. Sinkholes are most common in what geologists call, karst terrain. These are regions where the types of rock below the land surface can naturally be dissolved by groundwater A sinkhole is a closed natural depression in the ground surface caused by removal of material below the ground and either collapse or gradual subsidence of the surface into the resulting void. (Nov. 10. EPA. Third Step: has 1 heading "Why don't you like fruit?". Topsoil can help you establish vegetation. It's their sudden or deceptively large appearance that makes sinkholes dangerous, both to human safety and to buildings and infrastructure. Learn as much as possible about the land, the water supply, and the septic system of the house before buying or building. Most sinkholes occur in areas where the bedrock is formed from soft minerals and rocks like salt, gypsum, limestone, dolomite or others belonging to the evaporate or carbonate classes of rocks. Controlling an Underground Spring. Some sinkholes form when the land surface is changed, such as when industrial and runoff-storage ponds are created. Inhale and brace your core as you slowly extend one arm behind your head and the . According to the United States Geological Survey (USGS), sinkholes are pits in the ground that occur in areas where water collects without external drainage. A broken pipe can contribute to sinkhole development by flooding and weakening the soil, but it can also provide an outlet for the dirt and rock that's supposed to surround pipes. An example of such an area is an overburden composed of up to 100 feet of sand with some clay underneath before yielding to soft limestone. The first step in sinkhole repair is to figure out what's causing the hole to form. May 20, 2008. Sinkholes under sidewalks or walkways. Karst terrains are characterized by distinct and beautiful landscapes, caverns, and springs, and many of the exceptional karst areas are designated as national or state parks. That booming phosphate industry comes with tons of mildly radioactive waste known as phosphogypsum. Often, this surface rock is limestone, which is easily eroded, or worn away, by the movement of water.In a landscape where limestone sits underneath the soil, water from rainfall collects in cracks in the stone. Step #4: Contact Your Insurance Company. Most of us think about erosion on the surface of the earth, but erosion can occur in the subsurface as well. Some sinkholes give way gradually and are filled in with dirt or sand from above. Various schemes have been conceived to harness the Qattara Depression for energy production. Sinkholes are often funnel-shaped, with the wide end open at the surface and the narrow end at the bottom of the pool. Try to determine the extent of the hole by careful excavation and probing. There is no database of sinkhole collapses for the United States, so these data are unavailable. It is a frightening thought to imaginethe ground below your feet or house suddenly collapsing and forming a big hole in the ground. Be very careful when examining or working in sinkholes. A .gov website belongs to an official government organization in the United States. More than 850 sites of sinkhole dev. Sinkholes are made when sections of bedrock made of carbonate rocks (eg limestone and dolomite) are dissolved. When you reach out to him or her, you will need the page title, URL, and the date you accessed the resource. This raises the chances of collapse. . (Oct. 30. Cover-subsidence sinkholes occur in areas where sand covers the bedrock. How wide is it? circulating ground water. (Nov. 10. (Nov. 10. A lack of water can contribute to sinkholes, too. Topsoil can help you establish vegetation. Sept. 11, 2008. http://www.epa.gov/rpdweb00/neshaps/subpartr/about.html, "Another sinkhole threatens Russia." Contact yourState Geological Survey. Over time, this poorly compacted soil can become a preferred conduit for water which can scour out cavities and lead to a depression. LA Times. It is important to determine the cause; that will determine the steps needed to fix the situation. Note that an underwater sinkhole is also known as a blue hole. There is no database of sinkhole collapses for the United States, so these data are unavailable. It is a geological process that occurs at the Earth's surface without affecting the mantle or core. 2008) http://pubs.usgs.gov/fs/2007/3060/pdf/FS2007-3060.pdf, Special Offer on Antivirus Software From HowStuffWorks and TotalAV Security, Pennsylvania Department of Environmental Protection. In the US, Florida is one of the states that are most prone to sinkholes. Most natural sinkholes happen in areas with large deposits of carbonate rocks, like limestone. a. contributing organic matter to the soil. So let's head underground. But there are some people to whom finding a new supply of water is vitally important. Sinkholes are dramatic because the land usually stays intact for a while until the underground spaces just get too big. (Nov. 10. Remove any trash, grass or other debris from the depression. The most damage from sinkholes tends to occur in Florida, Texas, Alabama, Missouri, Kentucky, Tennessee, and Pennsylvania. "What a Waste!" After enough material falls into pipes and is transported away, the surrounding earth becomes destabilized, contributing to sinkhole formation, sewage or water spills, or other disasters. After a cover-subsidence sinkhole reaches a certain size, sand and sediment usually pour into the hole. If you're concerned about damage to gas, electric, water, or sewer lines, contact the appropriate utility company. When water floods a developing sinkhole, some of the topsoil and other material can be caught in the conduits, further trapping water and limiting its ability to flow outward. But what other problems can they cause? If the sinkhole is in an easement, who do you call? so think carefully about where you might step. The source of the sinkhole problem will be revealed by excavating the affected region. Sarisarinama sinkholes were first discovered in 1974, high up on flat-topped tepui mountains, and have been described as part of a "lost world" [source: Melham]. A lack of water can also result in sinkholes. . Sometimes running water can be heard in a sink hole. 2008) http://aquat1.ifas.ufl.edu/guide/sinkholes.html, "Geotechnical Engineering Gem." Solution Sinkhole Solution sinkholes are most commonly seen in areas that have a very thin cover of soil on the surface, exposing the bedrock below to continual erosion by water. http://stackfree.com/, "Cenotes in the Yucatan, Mexico." April 22, 2007. So it was in 1994, when one of these stacks collapsed into a 150-foot (46-meter) deep sinkhole. These cracks are called joints. A sinkhole may occur near a buried stormwater, drinking water, or wastewater line, either because of poorly compacted soil or because of a leaking underground pipe. Also, like in other types of sinkholes, objects and other material can get stuck in the fractures where water would normally flow out. All rights reserved. Land A sinkhole is a depression in the ground that has no natural external surface drainage. Flex your feet and tuck your pelvis so your low back presses into the floor. Over time, surface drainage, erosion, and deposition of sinkhole into a shallower bowl-shaped depression. Organisms contribute to soil formation by ________. Fairfax, VA 22035, Northern Virginia Soil and Water Conservation District, Soil and Water Conservation District Homepage, About the Soil and Water Conservation District, small French drain or catch basin and pipe, Return to Solving Drainage and Erosion Problems Main Menu, Sinkhole - Solving Drainage and Erosion Problems. The pipes running through easements generally serve multiple residences. Two types of sinkholes exist. Similarly, Mount Gambier in southern Australia is known for its picturesque water-filled sinkholes and volcanic craters. 02. Though many are less than 100 feet (30 meters) deep, sinkholes can look like ponds, cover hundreds of miles or fit discreetly in your backyard [source: USGS]. Perhaps no sinkhole is more distinctive than the Qattara Depression. Step #5: Consult with a Soil Testing Firm or Engineering Company. Stephanie Pappas is a contributing writer for Live Science, covering topics ranging from geoscience to archaeology to the human brain and behavior. In Fairfax County, these depressions technically are not real sinkholes. Typically, sinkholes form so slowly that little change is noticeable, but they can form suddenly when a collapse occurs. 2007. If they sit on public property, city officials need to be contacted. You may want to overfill the hole since the fill soil may compact and settle over time. During home construction, when the yard is graded and compacted to its final shape, large rocks may be buried in the soil. This blue hole is found at 16.31 degrees north latitude and 111.46 degrees east longitude below the surface of the South China Sea. The USGS Organic Act (43 U.S. Code 31) prohibits the USGS from making surveys or examinations for private parties or corporations.
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