Railroad Tunnel Under Town - Dam Breach Experiment 

this is the most advanced version of building a city so you can pretend to be a monster/villain and knock it over, and i'm extremely here for it. the destructive power of water is something we all tend to underestimate, and this really does wonders for putting it into perspective.

Very impressive underground structure! First time we’ve seen the water go over the top before flooding the tunnel right?

Let this be a warning to anyone looking to buy a house built on loose sand and in close proximity to a dam. 👍

That tunnel is similar to a cut and cover design and perfectly explains why rectangular section tunnels are not used for intense stresses, instead either a round or arched cross section is used. I'd like to see the effect on an arched design.

It actually surprised me that the tunnel wasn't the weak point! I would have thought that as soon as the water got to it it would've seeped in and caused more issues than it did

This is a very good demo of what’s happening on the Holderness coastline on the Eastern UK coast. Buildings are at a huge risk and many have already been sacrificed. And it’s accelerating. So, this has a hell of a lot of real life applications.

This is a great example of why plants and roots are important for damns and levies. My local town has an artificial lake and they cut all the trees down on the berms. Both of them cracked and they had to drain the lake below them. It's still not fully fixed as far as I'm aware

Would be cool to see if the trees actually anchored sand and perhaps see if the could actually lessen the damage

Man, it's like being a kid again watching these, extreme fun.

Suggestion: PVC or Clay Tube representing train tunnel, with tiny as possible air holes drilled in. Incorporate small pebbles and dirt layers representing some modern city landscapes. You even reuse those bricks because they may be structurally compromised being that they were wet and had to dry. Still keep the ruptured damn theme going and possibly add an old cracked foundation somewhere in there. It sounds a bit complicated but I’m sure it’ll make a great video. Awesome Job As Usual.

The loss of life and the small community perched on top of the hill was tragic as the dam took over. I hope everybody got out safe and were all rescued. Has the clean up begun?

I wish the tunnel would have been sealed against the glass better, because it appears that's where most of the water crept in, not from breaching the tunnel itself.

every dam breach experiment is always so satisfying with the outcome, but this one was like the best one just because the underground structure lasted and it leaked through the top

My one big regret with these videos is that the lack of space means you don't really have the option to play around with shallower angles of repose for the dam to prevent sudden collapse early on or layers of different materials to try whole new designs. That being said, I still love these and compose headcanons for all of them. I called this one New Johnstown.

So glad I finally watched this! That was 100% NOT what I was expecting to see happen! I was sure that when the water reached the tunnel the whole thing would collapse in a catastrophic failure.

Interesting to watch, but technically, that was a cliff collapse or an embankment failure.... it wasn't a dam breach at all. Still, a lot of hard work went into it, and it looked very realistic. Thanks for uploading your carefully planned and executed work! 👍👍👍 Really impressive! 😊

This is so sad. My thoughts and prayers goes out to all the plastic figures effected by this disaster 🙏🙏🙏

Can we just appreciate how airtight that tunnel was

Really neat! Only issue for me was the constantly changing camera. I know other people like it, but I feel like the upper view and in the water didn't really show as much as the side view and felt like I was missing what was happening every time it switched away from side view.

There's always gonna be one guy that'll sleep through all of this in real life.

You see an impressive dam engineering project. I see a immersive sandbox😆😊 It is really cool to see. No joke, water erosion is hella dangerous. Its takes out entire areas. Colorado has floods but that's tame compared to our mud slides. Our biggest issues is loggers not being responsible and removing too many trees, which serve as anchors for dirt.

I'd love to see something about trees, and whether roots of trees have much of a protective effect. I think it would be very interesting.

This is why I appreciate the work of well developed, good and smart engineers when they build something against the dangers of the nature, specially the water

Wow. This was just as suspenseful as an actual movie. I also feel like I received an education!

man these videos never seems to disappoint me with the satisfaction and creativity and efforts put into these haha good job man

I would love to see you push your limits and try to make a very structurally stable build inside some sand, and try different tests. Like slow water rise, fast water rise, have some of the container be split off and filled with water and then open the wall to cause a tsunami like wave

Mother Nature will always be the stronger force than humanity. Thank you for uploading. Interesting and scary at the same time.

Anybody else watch the full video and not learn anything other than the fact that it was entertaining to watch?

This was awesome!! I love watching the underground bits get flooded; especially how this still had an air pocket below

The same thrill I have when I was young watching 80s Japanese series, “Sinking off Japan?” Forgot the title. Glad I found your channel, so relaxing. Imagining “ only the corrupt and filthy rich “ get washed out 🤣

Wow! Love it! When I was a child I used to build citys, houses and buildings to destroy them in similar ways. This video made me remember beautifully times. 😍😍

I just randomly discovered this, man it is a lot of fun to watch. I seriously feel like a kid again lol. Makes me want to do similar IRL.

These are really interesting. Would be cool to see how different soil materials effect the results. Ie: clay, gravel, heavy soil, etc

I haven’t watched the video yet, but a previous problem I saw it a couple of videos, being very loosely packed sand is clearly fixed. There may not be any anything in between the brick to prevent water from leaking, but I wouldn’t say it is necessary. Judging by the comments, this will be quite interesting. This is very good indeed. Thank you! Edit: I can clearly see what looks to be veins of minerals (in this case it’s obviously just a different kind of sand) and very detailed approach. I am truly impressed that you took the time to do that, and even the water flows through it quicker!

I love being a hero and building people lovely stuff, and then destroying it all with water, btw I saw those videos when I was a kid it was fun and funny for some reason

That's why they don't build dams just out of sand Good work! I'm kinda dissapointed the tunnel didn't collapse though

Hey! Had some great ideas: 1: Durability test! Three parallel walls of bricks, spaced a brick’s width apart, with sand between and covering them. Final structure would look similar to: / III \ …However, the main difference is that the bricks go all the way to the bottom. You can also use the dam’s width to build stuff on top: maybe an airport? 2: Instead of building a dam on the short axis of your aquarium, why not try one on the long axis? 3: Two parallel dams: when the first dam fails, the process of collapsing the second begins. 4: You use large stones to break up the water flow… but what if you put some inside of your dam to strengthen it? 5: This one is to improve your setup and allow you to get more space. Instead of using stones to break up the water’s flow, what if you placed a piece of fabric over the end of the tube (like a scrap of an old T-shirt) and secured it on with waterproof tape? That way, you don’t need the stones as a splash shield: the water would simply soak through the fabric, keeping it from splashing. 6: Tutorial video on how to make these. 7: Paper strips as “rebar” for the sand. 8: Build a massive underground complex over the whole base of your tank, with the roof supported by bricks in some places, and sand in others. Cover it all in a thick layer of sand (you can even add a chimney/air shaft to allow water in slightly earlier) so you have maybe half the height of the tank used, then begin to flood the ground above the complex. When the water gets into the complex and eats away at the sand supports, those sections will cave in, eventually either collapsing the whole structure, parts of it, or simply creating an underground flash flood. 8: A small chunk of sodium or a similar element: the higher ones are more explosive, but these ones just produce hydrogen gas (possible fail reason, as if buried it’d likely generate a lot of pressure that could blow your dam apart or at least cripple it.

Bro my guy's still doing this after 4 years, respect.

for future tests it would probably be better to just have all the feeds seperately like cam 1, then show cam 2's footage, and so forth

Mom coming down stairs; “ I dont know why you always feel the need to do these dam experiments”

I like how the rail road thing below was fully trapped under water and was still pressurized by the air

This guy is literally the kind of stuff I watch at 3am, no hate though. These are still really entertaining

Ooh the HUMANITY of it all! What a nice little display of the real thing - Good educational value too for ppl like me who depend on Dams in the Netherlands

Just had to drop in to let you know, as someone that has had to recover vehicles from incidents like this in real life, it is surprising how perfectly it shows what happens to vehicles. Well done, couldn't look away from this the whole time.

Woah, man! I've neen waiting for bunkers and tunnels - and you've made one! Incredible!

You should do one similar to this but instead show how water pressure + flow will cause the base to erode out underneath the dam. You could do this by having a float (so as to not fill the "lake" side too full and a sump on the other side to catch any water flowing through and pump it out. Would be interesting to see how with a steady water level how a dam still fails.

There’s just something so mesmerizing about flowing water that I’ve always been fond of as a kid

Fun to watch :-) Idk if 'realism' is key but you could see shear planes in the sand due to way it was constructed. Not sure if results would differ if the sand was layered then then cut to shape as in real world (erosion/weathering). Also I suspect tunnel is anchored to glass? A weird problem with real submerged tunnels is remarkable amount of upthrust they can generate due to buoyancy. Would be fun to see if an unanchored tunnel would actually lift the village. Appreciate the work put in. :-)

Props to the cameraman for filming underwater for almost 12 minutes

Sup I love dam breach’s make more or else I will come to your house

Ground Water truly is a Riddle wrapped in a Mystery inside an Enigma.

The ultimate sand castle experience! Great video!

I remember when this channel started off. And it was still amazing

I watch your videos to help me sleep best videos ever

These are awesome. I used to set up "disasters" in my lego towns. Earthquakes, sinkholes, cliff collapses, hurricanes... but I never used real water.

This content is legendary. This is exactly why RU-vid exists. Thank you I will be watching the absolute hell out of this. Regards

Very original, good gob man! I want to present a potential design: A brick core surrounded by sand, and chopsticks or coat hanger wire secured to the birch to add structural support, kind of like steel reinforced concrete.

4:14 me waiting for the flood to be over

I was so focused on the tunnel collapsing that I didn't even notice that the water was going to go over the entire hill. Nice!

Am i the only one that finds this extremely satisfying or is it just me 😅

Wouldnt it be nice to experiment with different kind of sands? Home depot stores often sells different kinds of sand. I would love to see that !

I like how the colapse of the big sand wall shows how important roots are in keeping big hills and such together

Spot on replication of the California coastline.

Truly an interesting RU-vid site. Finally something interesting. Thanks for that!

As a random dude who never does anything like this, a mix of fine rich soil, sand and clay (Fine silt too if possible) might be a better medium than just sand. Not a criticism though. Loving your videos so far

Wow the guy that told you to make underground tunel. You really make it thank you for your made to see all people that new at this channel.👍❤️ Edit: I wish someone can give me a like?😳

The way how that bunker started leaking was the best!

New Orleans is so pretty this time of year 😍

Cool how u can see what happens to flood shelters when it floods and what it looks likes when they give away.

Devastating. Subscribed.

Your dam breaches are always so satisfying to watch! Keep the good work up, follow your dreams!

It’s wonderful to see how destructive water is. Imagine a world wide flood, how it would be able to change the entire landscape and carve out rivers and canyons when waters recede. It’s incredible to see the world we live in today and see how scarred it has become in a very short time.

POV: It's midnight and you work tomorrow

Muito foda cara, os 12 minutos mais bem gastos da minha vida 👏👏👏

*Man, seeing this feels like I'm watchin a miniature disaster movie.* 🍿

I like your style you even have garbage and an entire vehicle already in the lake. Very creative

tbh, I missed watching these types of videos like years ago probably 2016 or smth

Until the end I wasn't sure what would happen to the tunnel. I was betting on it collapsing, surprised it didn't, even though damage to the tunnel walls seems severe and probably not worth the effort of repairing it.

This reminds me of a Warhammer 40k quote: "The planet broke before the Guard did". In this case, the hill broke before the tunnel did.

You should make your videos in slow motion, so it looks like a real scale event, it looks cool as heck.

One thing to mention, if that were an actual tunnel, the water would not rise on the bottom anywhere near as fast due to the near unlimited distance for it vs the area that a dam would affect.

There's a LOT of problems in this simulation : dirt doesn't have the same absorption rate of water than sand, it also depend the type of dirt and the vegetation (more tree = more sturdy grounds against water) If a dam were to break it would flood much quicker + it would come as a wave (so there would be an initial impact) Tunnels aren't make of spaced brick, so in reality they are more sturdy and above all really water proof. Still the video make a good entertainment and a lot of efforts have been put in it's making, that i have to congrat you for. But yeah, it's not really realistic. Could be a little realistic for a flood of costal city though.

Я от начала до конца посмотрел. Обычно редко смотрю видео продолжительностью свыше 10 минут, но ради интереса сделал исключение

There is something really satisfying about watching this toy place just crumble away.

Как же я любил в детстве такое устраивать со своими друзьями в песочнице...

1:10 Woah! That was unexpected! The whole dam moved) 6:53 Still strong dam... How is this possible?! 8:00 ...sigh. It was really solid... But water hasn't passed yet! 10:24 Press F) But it was done by high water level, not by dam's weakness. Even with tunnel it was solid enough.

Even in such a small scale model the force of the water is kind of terrifying - very cool display! Thanks for sharing.

Idk why but these type of videos are always entertaining

I find it extremely disturbing that the people make no effort to save themselves or others.Oh the humanity.

I'm brand new to your channel I love it it is so satisfying

Very entertaining and fun to watch. Camera work was awesome as well. Thanks for posting this.

地下鉄、海底トンネルかな？、がどうなるか知りたくて最後まで観てしまいました！ BGMが良いですね！

New subscriber, I love your videos that's very creative and we can see all the efforts you put on it,good work man

florida after experiencing a hurricine 27 times a week:

10 years ago I watched videos like this every week.

This is the first video I've ever seen with this kind of content, and man I just gotta say that sand slide was just absolutely satisfying

What I want to know is how it goes differently if you pre-moisten the sand with a spritzer bottle. You know, to simulate rainfall.

This was so cool. Never knew I would be so fascinated with watching a dam fail. Instant subscribe.

Excellent video every engineering student should watch!

Just discovered this channel today and DAMN this is so cool but i have a question: How much time does it takes you to set it all up ??