How Do Sinkholes Form?

Sinkholes form through both natural and human-made processes.
Most of us think about erosion on the surface of the earth, but erosion can occur in the subsurface as well. In fact, scientist and engineers have a very creative name for just such a process: internal erosion. If just the right factors come together in the subsurface, some very interesting things can occur, including sinkholes.
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[@driceyt4252]

I didn't even know I wanted to learn about sink holes.

[@DuDe1040]

Did you forgot to take your meds?

[@fawndoe1917]

Don't cut yourself on all that edge

[@raptorguy3493]

DuDe1040 careful there don't fall

[@davefrance3721]

I bet you are also grateful to Blue Apron Farm fresh foods. Especially if you have just moved home and not even thinking about shopping for groceries...

[@DuDe1040]

The funny thing is you dont even realize to what we are referencing.Fucking idiot.

[@skylertan1691]

When your teacher put this video in your classroom: OK, this is gonna be boring..... When you discovered this video by yourself: This look fun. I should watch.

[@botter_my_totter]

So true 😂😂😂

[@ianc1097]

😂😂😂😂😂😂😂

[@donmizza]

Its soooo true 😂

[@ZaHandle]

it’s because the teacher keeps pausing

[@skylertan1691]

@@ZaHandle yea True. The teacher will stop the video and say a lot of useless thing.

[@kamyarnemati]

Now, every time I'm in my car waiting for someone or driving down the streets, I can think of nothing but a huge void underneath the asphalt that can open up and swallow me at any moment. Thank you!

[@bassdrumflextime1253]

same lmao

[@Crucisphinx]

It should make you feel better that you’ll probably not die from it, your car probably has lots of safety features that’ll prevent death in this case, including your airbags. I’d only be concerned if you live in a place where your roads are traveled very very rarely, and even then usually someone’ll notice a sinkhole before you’d run out of water down there

[@yamahaeipamaha8472]

@@Crucisphinx all the rubbish falling on you and crushing your car will definetly kill you

[@bigboi4269]

@@yamahaeipamaha8472 that falls before you do

[@yamahaeipamaha8472]

@@bigboi4269 Some of it

[@DJdoppIer]

(4:47) - Nothing represents fear like the googly eyes on that car.

[@thetelekiller9714]

Hahahahaahhah

[@partypoison3829]

Except for your profile picture

[@IsseiRaine]

@@partypoison3829 Noice

[@satchboogie2058]

Dude, this is like the Bob Ross of engineering.

[@tgsoon2002]

@sportster1988 Dude what are you talking about.

[@Username-yn7bb]

Nguyen Ngoc Kien You look like a wet paper towel

[@Blaze22F]

*Happy little sinkholes*

[@chbrules]

Just a few little happy engineering mishaps over here and there...

[@skylineqrt4]

Insert mom joke here

[@DailyDoseOfInternet]

Thank you!!!

[@aliciagibson6224]

Love your video's

[@nscalia8429]

I love your video's

[@Storm-lu2ce]

Bleh

[@jessmallory6591]

Hi! I wanted to say since not many other people have commented on this that I really like your videos and thank you for being my attention to this channel!!

[@vtablesalt8341]

Oh hello

[@wolfgangrodemich7822]

Me: Why do humans have two nostrils not just one? Practical Engineering: WATER

[@hexagon8899]

well yes, without water everything would die and nostrils will no longer exist

[@chunkyegg8472]

@@hexagon8899 dude stop

[@mokongthe3856]

@@chunkyegg8472 he be right tho. So We should all hail the wet water

[@thumuslol]

Anus

[@andreingramakadjscrewrip7372]

@@mokongthe3856 Water isn't wet, though

[@Olafandlafandlaf]

My question is what sort of things do engineers do to 'avoid' internal erosion? Sinkholes can happen in modern cities that have high building standards. Is it difficult to stop internal erosion from happening? What are the ways to minimise it? Thanks and great video.

[@sorsalala3906]

just some of my thoughts so take them with a grain of salt 1. take probes of the soil and excavate and change it if necesarry(very expensive so most likely not often used, if ever) 2. controll the waterflow in the soil better, maybe with some blockades or a waterproof layer, so it cant reach deeper then the engineers want to

[@Arjunkumar-dw8rw]

Trees are the only thing that can hold water and soil Just plant them

[@Tony_Goat]

@@Arjunkumar-dw8rw Trees are pretty and good for holding in soil, but I've seen their roots do some gnarly shit to water pipes that they happen to grow into. So either you're spending those days to deal with a sinkhole or you're spending days digging out a tree root that's grown into and blocking a water main.

[@MyChannel773]

@@Tony_Goat just reinforce around the pipe? either way i’d rather have to do water main maintenance than risk buildings falling down

[@Vid_Master]

@@Arjunkumar-dw8rw trees keep surface water in place, but their roots can break through pipes and barriers and cause sinkholes

[@physicsgirl]

This is one of the coolest demos I've ever seen.

[@rayanalmaimani4392]

Physics Girl hi 😁

[@ApprenticeDoge]

Physics Girl idk who you are but I feel like you're important so HI

[@PracticalEngineeringChannel]

Thanks!

[@anteconfig5391]

holy crap it's Physics Girl!! I didn't know you comment on youtube just like any other commoner. Mind... blown... Haven't seen you videos in a while, I get stuck watching pbs space time and smartereverday whenever I'm not watching computerphile or someother tech stuff . Don't worry though you haven't lost a viewer or anything.

[@reigny6256]

Physics Girl Hi physics girl!

[@Legority]

Me: “why did my parents divorce?” You: “ *w a t e r* “

[@niggapendeluxe1682]

Water eroded their love away

[@godet9694]

100% of Everybody who got divorced have been drinking water. Coincidence? 🤔

[@doddydoelink1374]

you: "another sinkholes..."

[@CommissarCail]

@@CC.07 ( ͡° ͜ʖ ͡°)

[@randomboi1685]

@@CC.07 XD

[@martinbarba7689]

"Be the water my friend" said Bruce Lee, aparentlly knows abot civil engineering

[@tamaralewis2766]

Thank you for the explanation. We were hiking the other day in a place that has limestone sinkholes and it fascinated my 9 year old son, so we set out to find out why they happen. He enjoyed your explanation and we both learned quite a bit!

[@jerrymiller2367]

Experiences like that can put someone on the path to a civil engineering career.

[@anarchosnowflakist786]

@@jerrymiller2367 tragic 😔 (/s)

[@signaturerush]

Pothole:who are you? Sinkhole:I'm you but stronger

[@DeathByLego]

Yeah you’ve never been to South Carolina. I swear some of them are sinkholes

[@malissamaehill]

Why just. Why

[@thegamingraven1691]

Malissamaehill Malissahill why not

[@signaturerush]

@StanleyCole12 oof

[@benjaminfortune2707]

He did a video on potholes too. However, if I remember correctly they're basically the opposite of sinkholes.

[@B_Skizzle]

I'm not entirely sure why KZbin recommended an engineering video to me but I did quite enjoy it.

[@saumitrachakravarty]

KZbin AI can read your mind now, beware!

[@patricks9057]

I'm in the same boat.

[@BroArmyCommander]

Then that's why

[@howardbaxter2514]

Welcome to the world of Practical Engineering. Please enjoy your stay.

[@talienakaru]

i was watching Xenoverse 2 modding video's but saw this and came here... who knew sink holes was part of gamming.. ooo wait they are.. the money sink!! but my joke aside i found the video very good so thanks for taking the time to make it.

[@peytonbaronne7336]

Hey Grady, I work as a crane operator for foundation contractor. We build foundation and set structures for transmission power lines. I'd love to see you do a video on vertical drill shafts and the science behind keeping them open. You make amazing videos man, keep up the great work

[@hsidsi]

The video was from 3 years ago... Do you think I can still be one of the first 100 people applying for the 3 free meals? 🤔

[@bengal4047]

Depends on how slow the other 99 ppl were

[@BlackCowboy0]

Yes

[@rabornevines7399]

You do the sponsored videos the best. "This is this video's sponsor. More on that later." I like not having to watch a 1 minute commercial at the beginning of the video.

[@arekkrol9758]

i even watched it instead of skipping because of that

[@TheICGames]

A lot of youtubers do that to. I believe the infographics show does that too. They imo have the best transition to an ad

[@mew2o635]

hqdnwrj4qgen4qjqhgaw recommended ep. 4

[@moisesmarquez7564]

@@arekkrol9758 I usually let it play while i read comments like this onelol

[@fruitella196]

A GHØST ew the infographics show, the most inaccurate channel on KZbin. Watch something like wendover productions or half as interesting instead

[@BlueBetaPro]

Your demos are always awesome. Makes the little kid inside me really happy to see water and sand physics again.

[@QRSC-fh2ob]

qgmlwy you have a little kid inside you?! how did... don't move! I'll call for help

[@shoujahatsumetsu]

It's called pregnancy, and it's alright.

[@ihavetopoopbutiwantedtosay1683]

sorry couldnt resist. im going to hell.

[@TheUKNutter]

you are an idiot Depends where you put it (lenny face)

[@ihavetopoopbutiwantedtosay1683]

TheUKNutter 😨

[@beakytwitch7905]

The drainage erosion holes under an asphalt road can be so big that they get measured in DDBs (Double Decker Buses). I came across a 0.5 DDB hole in Scotland a few years ago and rang the highways department engineer to report it. I gave location and suggested that they quickly measure the volume, then order concrete and fill it up before the road collapses. Next time I passed, what had been a huge hole was just concrete.

[@adillpickle6762]

Thank you for posting. I was a Forensic Geophysicist for 40 years. Sinkholes were my primary investigations. I never called a washout from piping a sinkhole though- We called the self inflicted washout for the press and local agencies as to not relate them to a natural due to fear factor. Educating the public is the hardest part of engineering LOL

[@MrTwinkieeater]

If I have a known sinkhole with a diameter of 20 meters and depth of one meter and is in a known mostly karst area and it holds rain water for over 4 dry weeks after the last rain, could that sinkhole sink anymore?

[@adillpickle6762]

@@MrTwinkieeater Sounds like it may be a cover collapse type sinkhole and may have sealed itself when it collapsed. When to roof of a void or cavern collapses, it can naturally drop the soils from above and like a funnel effect seals itself with the surface soils and materials. You can place stakes on 4 sides at the top and run string tight across to each stake and take periodic measurements in the middle to see if it still shows signs of subsidence. Sounds like you don't have much to worry about since it holds water for long periods of time.

[@MrTwinkieeater]

@@adillpickle6762 thank you so much for your information and quick response. I really appreciate you sharing your expertise. That does give me some piece of mind.

[@adillpickle6762]

@@MrTwinkieeater I hope I helped. I'm retired now but I used to be know internationally with subsidence issues. Good luck

[@ZiMZiLLA]

Shoulda done this video last month to celebrate Sinkhole de Mayo

[@austindrake2758]

ZiMZiLLA wtf we have like the exact same profile photo!

[@Whosoever141]

Cristian Radical 😂😂😂😂

[@mikehawk4517]

then*

[@ZiMZiLLA]

BFFs?

[@austindrake2758]

ZiMZiLLA only if there aren't any tests involved

[@cdawg3801]

Now these are the type of videos that actually deserve to be trending, not no "make up tutorials" that don't teach anything smart.

[@dezee7944]

Cristian's Aquarium CALLING THE SINKHOLE UNDERNEATH MY HOUSE (OMG ITS ACTUALLY ANSWERED)

[@lesflynn4455]

I was searching for videos on "how to pout like a Kartrashian," and "affordable butt implants," but now I know practical stuff about compaction, bridges, thermal expansion and internal erosion. Ahem. I was lying about the Karcrashian stuff. Just trying to be funny. And probably failing.

[@WinterbornMT]

I really enjoy your videos! I took a few semesters of physics in college and I really think just that little bit of understanding of the way I interact with the world makes everything more interesting. I think you have a great way of breaking things down to a level most people can understand but it's fun to learn.

[@jamesbelbin6343]

Could his have been what caused the surf side collapse?

[@Keke_24kt]

That's what brought me here... Surfside

[@sebbes333]

4:38 We should invent see-through asphalt! ;P

[@PracticalEngineeringChannel]

Yes!

[@MegaMGstudios]

Sion #glassphalt

[@MegaMGstudios]

לביא גלזמן lol we commented the same thing seconds after each other

[@Saareem]

bridges would be terrifying for people with the fear of heights. 😂

[@kevinhin8211]

Eemeli Saarelainen sinkholes don't really occur on bridges so I don't think there would be a need for see through bridges but who knows

[@GearDownForWhat]

Holy shit that's like the one question that everyone wants an answer to, but they don't even know it.

[@geeleiia8807]

i think i know you XD

[@GearDownForWhat]

Haha thats awesome! It's almost like I'm famous!

[@therealfastmoneyjay]

Gear Down For What? I'm ur 200th like!!!! woohooo

[@Whatever-mx3bt]

Gear Down For What? maybe I should've posted a video 5 years back, but my explanation wouldn't have been so detailed. Probably took a while to figure out the details.

[@NotEUSA]

Gear Down For What? exactly

[@chaseblackshir3798]

This is my only big anxiety I’m terrified of just sitting in my room and then just bang gone

[@ingGS]

I just would like to add, even if the flow is confined you can still have erosion at the exit due to the high hydraulic gradient locally. Great video!

[@nuruluin9840]

came for homework, stayed for the quality!

[@lolaandsuperpups2318]

Came for nothing, stayed for nothing:3

[@Unknown-ti6lw]

Came for something, stayed for knowledge.

[@tokutickler]

Me: Watches Dank Memes KZbin: You seem like the civil engineering type of guy

[@QuakMans]

TokuTickler same here XD

[@howiestillgamez5326]

Yay I did 50th like

[@zaidg6299]

Nice

[@ahmetakifyorulmaz4876]

Ahahahahaha very nice

[@00anzac1]

iiiiiffff you like dank memes and you...........

[@jamesneumann2003]

This happened in my hometown Ipswich, Australia, in the middle of a busy road. Bad enough the town is already called a sinkhole because surrounding terrain.

[@Twix385]

2:16 the vid is titled groundwater flow demonstration model

[@Twix385]

It is from about 5 years ago as of now

[@NostalgiCrazy]

So is it rational to have a fear of sinkholes? Considering they can be forming anywhere where there's a leaky pipe? How do I know!? :(

[@prosackmetheus5409]

Sebizzar You don't, unless you work as a city plumber.

[@Tbob2141]

Prosack Metheus and even then, you still won't know

[@NostalgiCrazy]

*fear intensifies*

[@prosackmetheus5409]

Sebizzar Sinkholes are indeed one of the scariest natural phenomena. A friend of mine from Ireland lives two blocks away from a MASSIVE sinkhole.

[@prosackmetheus5409]

Sebizzar Only places with poor maintenance and lots of rain.

[@TheBUGZNTA]

Nothing better than learning about something you didn't know you wanted to learn about. Channels like your are really the best on youtube.

[@ExtraWeenieSauce]

His videos are really interesting, I can sit for hours learning about something like a low head dam, or bridges, and hydraulic jumps.

[@dragorocky]

Fam, your videos go!!! I can’t get enough. They’re all interesting, and for a smart dude, U seem cool af. Keep em coming

[@grady3130]

Grady, you're the man.

[@SlRENN]

Ive waited years for such a wonderful demonstration of how sinkholes are made. Thank you.

[@reaper_exd7498]

This aint the only way. Look into caves and limestone dissolving into gypsum.

[@ivoryas1696]

​@@reaper_exd7498 Well, to be fair, he didn't specifically say it was.

[@timdegraw1784]

Just found your channel. Utterly amazing, very impressive sir.

[@careise]

Great video! My first grader and I really enjoyed watching it. My son said this was the best sink hole video/explanation that he has ever seen. 😃👍 Thank you so much for sharing it.

[@trentthompson627]

The sand with the purple water reminded me of the jars of peanut butter and jelly mixed together.

[@Spec_D]

Mmm...goober.

[@maddox9001]

those are for goo bers silly

[@zerosumgame5700]

Yay! Someone else remembers Goober! I'm more partial to a Fluffernutter sandwich with Banana slices, but that gets hard to choke down without something to drink, so I don't attempt to compare it to jellied sandwiches.

[@fredgervinm.p.3315]

Franken-stuff (cheese injected) Hot dogs and Hawaiian Punch...

[@LordDecapo]

I'll donate to ur page if u promise to keep making those demonstrations. even as an adult I love those kinds things so much.

[@rokas9374]

Donate to my page

[@MobileLearner]

@@clearsky4042 no

[@dereenaldoambun9158]

@@clearsky4042 Oof savage

[@MrSalmanmuzaffar1]

I love how easily understandable your videos are- thank you and well done 👍

[@astkcin]

Your videos are great. I Enjoy learning the true causes of things! The Demos you build are always extremely helpful.

[@The.Talent]

I remember my brother teaching me about how water changes things and in his best Jeff Goldblum impersonation he said "water uh, finds a way".

[@angogoblogian4390]

After reading your comment, I said that phrase about ten times trying to perfect my Jeff goldblum. XD, good stuff m8.

[@b43xoit]

Your brother has DHMO awareness.

[@TheDoctorPretzel]

As a plumber I've seen this happen, we once started digging a hole for a burst water main and the surface collapsed below our feet! Luckily it was only about a foot drop 😂

[@O.M.96]

TheDoctorPretzel u can see the dirt move slowly & crack before it caves in

[@wayneyadams]

A sinkhole swallowed up a house in the neighborhood where my mother-in-law lives. The family was ordered to leave and not allowed back in to get any personal possessions, everything they owned went down, and all that is left is a large overgrown depression in the ground. Sinkholes are particularly bad in Florida where we sit on mostly limestone.

[@Strugglebucket135]

Thank you for the googly eyes on the truck. It looked concerned when it was swallowed. Your attention to detail is appreciated.

[@Zyxwvutsrqponmlkjih]

"Why am I gay?" "Water."

[@gulaurfo6104]

Nothing wrong with being gay.

[@HSingKing]

Biologically wrong, but financially not..lol

[@Multibe150]

Without water, you wouldn't be alive, and per say, gay.

[@Nick-mh8uv]

old man no that's wrong it's turning the make frogs to females I thought it was just a meme but it's true lol

[@k-link5151]

Big Brother 8

[@user-bx5ts8sb6k]

Minecraft lied, you *CAN* break bedrock!

[@vailabegaming8142]

Of course, are you dumb?

[@vailabegaming8142]

@Spekify What?

[@vailabegaming8142]

@Spekify Please clarify the joke then.

[@accuratejaney8140]

@@vailabegaming8142 m8, bedrock in minecraft is one of the unbreakable blocks

[@TheGamingNoob-ug8ds]

@@vailabegaming8142 unbreakable blocks = barriers , command block (unless in creative ), end portal block , bedrock and a /fill repeat command block ( in short it's making a block next to it over and over if u break it it just comes back

[@le_th_]

Super cool of you to provide free (accurate) education to the public online. Keep up the great work!

[@dougsturgess2651]

Please continue to do more of these videos! You make it fun to learn.

[@cesaravila7616]

Hi I am a civil engineer, from TJ Mexico, good videos you explain things simple, just like often do to order people but Whit out the models.. Keep up the good work..👷

[@AirborneSurfer]

Water is patient. Water waits.

[@user-sv9mo1qx8y]

oh my

[@nooneofconsequence1586]

Matthew Eargle - AirborneSurfer Be water, my friend.

[@nooneofconsequence1586]

GE LO Congrats for catching the reference, Captain America.

[@weller609]

I think its a doctor who reference.

[@IronKing66]

Just don't drink it of it's from Mars

[@anaconda3865]

Excellent video. Very educational. Thank you for taking the time to make this :)

[@KethenGoesHam]

You should do a scale model of irrigation pivot pumps effect on surface and ground water. Saw a demonstration on it 10 years ago. It was fascinating how powerful these pumps are

[@Mahtt]

You should check out the town I live in. It's Palmyra, in Pennsylvania. It's the sinkhole capital in the nation. It's horrible, just about every road/house ends up having a singhole. Hell I have 4 huge ones behind my house. We just build a new firehouse for 1.2 million dollars, and right when we where about to have a grand opening, a huge 15 foot by 15 foot sing hole opened up right in the driveway. LOL.

[@postmortemspasm]

Id love a singhole, sounds lovely. a hole that sings? what a world we live in

[@meldinssti3311]

Cygnet I live in Fraser Michigan we had a sinkhole that put the state in a state of emergency lol

[@leslietaylor4458]

Try Perryville missouri... perry county Missouri has more registered caves than any other county in the us

[@SheafferSelect]

I am near you (Lancaster) but in palmyra weekly Sinkhole Saloon is one restaurant that I used to sell wine too when I was a sales rep few years back

[@rufus5208]

Dude wtf, why are you laughing? You're lucky your house didn't get swallowed by that sink hole.

[@spicynoodle8870]

Make a Piping Video! Love what you're doing, I'm thinking of becoming an engineer.

[@dphkommentare7267]

But to do that you would have to stop being a weeb. jk

[@k1ngjulien_]

One Puch Man is the only anime i've ever watched, I think it's great. Really funny show :D.

[@cheesse9yearsand]

Spicynoodle88 dad is that you

[@iqbal7631]

Spicynoodle88 Think again

[@TheRealE.B.]

Don't you mean you're think about *what kind* of engineer you want to become? ;)

[@cierramontoya5736]

The entire State of Florida sits on Limestone.... Florida is just as well known for for sinkholes as it is hurricanes

[@charles8769]

No way according to conservatives only China has sinkholes

[@dianecelento4974]

I'm finding this out. Wouldn't want to own a house in Fla.

[@codiefitz3876]

@@charles8769 The fuck are you talking about

[@teakpeke3460]

Always interesting. Always informative. Always well thought out and pedagogical. I really like your videos.

[@avocares]

I recognize those streets, Seattle!

[@kindred2135]

Mat D Ayyyy lets GOOO

[@Sumokijo]

The moment I saw it I knew where it was.

[@ruthlesstyrant8879]

Mat D Same!

[@x9x9x9x9x9]

Sink holes are my biggest irrational fear. Seriously afraid I will fall asleep and wake up at the bottom of one or not wake up at all because the ground swallowed me.

[@KoalaProductions]

Same. That fear worsened for me when a sinkhole opened up only one block away from my house and it destroyed an intersection in the road and it took 2 weeks to fix it.

[@seanstrickland4970]

Nick Lemke I'd like to say you are crazy but my niece had one open up in her front yard while playing and she almost died or would of been seriously hurt but managed to catch herself lol they did a news story on it so I guess it's not really that irrational lol

[@x9x9x9x9x9]

sean strickland what makes it irration for me is I live in Oklahoma where the ground is clay so sink holes don't really happen here.

[@brianlim3345]

x9x9x9x9x9 lol if u get swallowed u wouldnt be waking up

[@x9x9x9x9x9]

Except for that split second of "oh shit im falling!" Or in the case of the man in florida long enough to cry for help but die before it gets there.

[@natangomes94]

I get amused on how there is always a quick demo for every video i've watched. Great work

[@jmr1068204]

Pryce from Breaking Bad is doing Practical Engineering videos now. That guy has a lot of hats.

[@SteveFrenchWoodNStuff]

If a civil engineer gets mad and acts irate, are they still a civil engineer?

[@user-sj2vg8hb5q]

Wood 'n' Stuff w/ Steve French no, that's an architect then

[@tetrabromobisphenol]

Yes. They work for the city. It's part of the fun of plan check lol.

[@charlesvitanza8867]

You'd think they'd be called uncivil engineers then

[@johngifford7725]

Falling Down.

[@nuraizulazren7673]

@@charlesvitanza8867 hahahahahHA

[@pedrobomfim1155]

Engineer, this is the first video of yours that I watch. It had just appeared on my recommend list. Pretty good stuff, gotta say =). Could you do an analysis on "O desastre de Mariana" or "Mariana's Disaster". It is a Brazilian catastrophe that happened because of a mineral dam that broke up and flooded many cities. Thanks a lot, keep up with the great job!!

[@OneDirection2V]

Pedro Bomfim what a coincidence. It is the first video I watch from this channel also. Unfortunetely it is also the last cause I am not planning on subscribing. maybe I should to be less of an ignorant... 😧😧😞

[@SwordBlaze]

Pedro Bomfim Great idea!

[@jenniferlindsey2015]

As a CET, I love watching Post10 videos and this was the perfect video to explain to my BF how sinkholes form when a culvert is built and there is no ongoing inspection. Many areas refuse to fix the problems until failure occurs and wishing good-luck to anyone who may get injured.

[@justinreynolds3411]

Near where I live, sinkholes are prevalent due to shale/limestone substrate. A nearby quarry using dynamite exacerbates issues by shaking the area.

[@ananz9233]

oh. that's why there is "dirty" water and holes infront of my condo and day later a huge hole and there's a big pipe under it. and the pipe was broken

[@luciferstrykerdawson2967]

anan zhang ikr its scaaaryyyy

[@marxismleninismkanyeism6440]

Dirty water is sewage

[@raizenlim6910]

I hope you're okay

[@Jhayar2130]

becareful buddy!

[@Z3R0F1V3]

me at 2am thinking about going to sleep sees this video: *I DONT NEED SLEEP I NEED ANSWERS*

[@renosgarage7451]

Yeah its 2am and I'm reading this, nice

[@zaidg6299]

I proudly gave you your 69th like can I get a nice

[@ethanpettit6418]

It’s funny cause I saw this at 2am and I thought the exact same thing

[@darkestfriend7281]

Jaguars Fan man I missed it 8am gang rise up

[@jolantaalksare5481]

Same

[@froskoausto9121]

Hello from Darwin Australia, I fell into a sinkhole at work a few years ago. A very scary experience l would never want to repeat. Thanks for the video

[@imweird3192]

Me: * about to go look up a song * This video: hi Me: okay, tell me the stuff

[@Misack8]

Please, do the piping video. You mentioned Teton Dam, but may I sujest you take a look too at the Mariana's Dam disaster aka Bento Rodrigues dam disaster that happened in Brazil in late 2015. I think it wasn't just a bad planned upgrade to the dam or negligency, but a continuous erosion that was neglected and a last minute fix that could have made everything worse. Anyways, do make a video about piping.

[@Yartarb]

So if I live in a basement apartment I’ll be gone first?? 😭😭😭😭

[@theo7340]

roxo166 yes, that’s how falling works

[@yarilizmorales5584]

roxo166 same.

[@vinceallenmeneses5883]

thats why you have to stay in school.

[@devonneward4952]

YEEEZ

[@suavegrips3184]

Joeizbest weighing the pros and cons, I'd rather die quickly under a collapsed building than be burned alive in a trapped one

[@demsyciu]

Your explanation is the best here! It's answer the question i had in mind regarding the sinkhole

[@cliffp.8396]

I'm always impressed with your natural teaching skills

[@northatlantic2723]

Excellent video! I like all the demo setups you build. This is so much clearer and intuitively understandable than a diagram in a textbook (and I've seen a lot of those). I knew how sinkoles form, but I watched just to see you explain it the way you do. Thanks for making all these videos!

[@kimdicillo8518]

Most of the world is water. Water is dangerous. We drink water. What is it doing inside of us?

[@Joshua_Starshard]

They say that water is essential for life. Me: surprised pikachu face.

[@ZaHandle]

Joshua Bradford life is dangerous

[@Motowad]

Vsauce, Michael here.

[@piduino]

Sinking to your holes

[@pflaffik]

Water is extremely dangerous if you are a crispy lifeform. Put a biscuit in gasoline - it stays crispy, put it in water - it softens and then dissolves.

[@Mr.Pip_]

This was taught wonderfully. Thank you!

[@jbj7799]

When you accidentally update the sand block.

[@PizzaaTimee]

why cant my lectures be this interesting

[@nacoran]

When I was a kid the water pipe coming into our house sprung a leak. They sent someone out to look at it and determined it was on their side of the valve, and decided since it was late Friday and the flow wasn't too bad that they would save some overtime by fixing it Monday. My brother and I played in the water and sand all weekend and had a grand old time! (My back got sunburnt!) Anyway, Monday rolled around and they showed up with a backhoe, which promptly had one of its tires break through and collapse part of the road. By the time they got it out the hole was probably 6 feet across, right in the middle of the road. I suspect they failed on the cost benefit analysis portion overall. I make a point, anytime I see water coming out of somewhere it shouldn't, to make sure whoever is in charge knows about it. The people usually are pretty dismissive, so I tell them that story to give them an idea of what can happen if they don't deal with it quickly.

[@TheAnantaSesa]

Feng shui says any leaky pipe will manifest a drain on the responsible person's finances so they recommend fixing leaks ASAP with urgency. The OP story is a piece of evidence why.

[@BicyclesMayUseFullLane]

While feng shui is mostly bullshit, there are some nuggets of life tip within.

[@TheAnantaSesa]

+Mingwei Zhang, yeah. I wonder how much of that philosophy is a response to their culture and climate and how much is independent of culture in its' effect.

[@DrumTeacherManila]

now I understand why Bruce Lee said "Be like water, my friend" .. such a gentle but destructive force...

[@crushingbelial]

Very informative and clear presentation. You just got yourself a new subscriber. Well done!

[@Ratlins9]

Grady, love your videos. Excellent explanations, scale models, photos, demonstrations, etc. Thanks for making these interesting and educational videos.

[@rodevans602]

Bravo! As an erstwhile Hydrogeologist I must say I’ve never seen these processes described better...

[@raynic1173]

Many roadway defects are do to improper compaction from the contractors. I was involved in soil testing and getting contractors to compact all the soil lifts is very difficult. If you notice a dip or depression in the asphalt, often you'll find some kind of piping leading into a manhole, meter box, or storm water inlet.

[@dianecelento4974]

I wish the engineers who built the condos in Fla watched your video. I'm assuming it's a sink hole but hasn't been confirmed yet. Can you do a video reflecting what could happen if a building is built too close to the ocean?

[@fashionfreakak]

Just randomly came across this video. It was very informative. I learned something new and the visual demonstration helped me understand it better. Keep up the good work.

[@AirCannonChannel]

Very cool to watch, now let's go build it on a larger scale!-.

[@illuminavi1862]

we have, it's called human civilization

[@luisgonzalez5482]

You mean wreck it.

[@maxischew514]

Guess you have to burst a pipe underground.

[@youtubecomment7974]

Dalton Chew destroy pipe december

[@peanutmeisterofficial]

AirCannonChannel a

[@AMULET72]

Great content again Grady, thank you.

[@mffromhellwhokillsu]

good show, top shelf!

[@youli3568]

Why did my parents get divorced? *water*

[@KoalaProductions]

She wet the bed too much.

[@KoalaProductions]

Your mom's sink hole was fake news.

[@Boogers32150]

LagiNaLangAko23 - GOTEM

[@Elmo2340]

It was internal erosion

[@HandledToaster2]

this is why I read comments before even finishing the video

[@moth.monster]

"How are babies made?" "Water."

[@hayaokakizaki4463]

Well, no, but actually yes.

[@yeetdosis39]

White water

[@marcschaeffer1584]

You need to make twice as many videos. Some of my favorite videos on the internet are yours.

[@dixitkumar9050]

Even if I'm Physics major, I am curious always core engineering phenomena, and explain them wonderfully. Thanks for effort!

[@ezabala]

Wow! Your videos rock! They explain so much more than those civil engineering lectures back in school. Keep up the great work Grady!

[@BryceDearden]

So happy you're back Grady!!

[@ABeautifulTraveler]

Let you know what I think? Well i think your channel is pretty amazing! I recently subscribed because I love learning about the physics behind engineering decisions, successes and failures alike! Great channel!!!

[@Yourmom016]

I have a waterfall in my backyard and the water just disappears into the ground. We’re thinking there might be a sinkhole underneath our house 🤪

[@WhatHappenedIn-vt3vq]

Might want to get that checked before you risk a cave in