Why Fish Ladders (Mostly) Work

🐟How fish get past a dam!
📰Compare news coverage. Spot media bias. Avoid algorithms. Try Ground News today and get 40% off your subscription by going to ground.news/practicalengineering
Everyone has a different perspective about what it means for humanity to live harmoniously with all the other life we share the planet with. I think it’s fascinating how those ideas and endeavors trickle down through engineering into the real world.
Watch this video ad-free on Nebula: nebula.tv/videos/practical-en...
Signed copies of my book (plus other cool stuff) are available here: store.practical.engineering/
Keefer, Matthew et. al. 2021: www.ncbi.nlm.nih.gov/pmc/arti...
Practical Engineering is a KZbin channel about infrastructure and the human-made world around us. It is hosted, written, and produced by Grady Hillhouse. We have new videos posted regularly, so please subscribe for updates. If you enjoyed the video, hit that ‘like’ button, give us a comment, or watch another of our videos!
CONNECT WITH ME
____________________________________
Website: practical.engineering
Twitter: / hillhousegrady
Instagram: / practicalengineering
Reddit: / practicalengineering
Facebook: / practicalengineergrady​
Patreon: / practicalengineering
SPONSORSHIP INQUIRIES
____________________________________
Please email my agent at [e-mail]
DISCLAIMER
____________________________________
This is not engineering advice. Everything here is for informational and entertainment purposes only. Contact an engineer licensed to practice in your area if you need professional advice or services. All non-licensed clips used for fair use commentary, criticism, and educational purposes.
SPECIAL THANKS
____________________________________
This video is sponsored by Ground News.
Special thanks to @PNNL and USACE, Walla Walla District
Stock video and imagery provided by Getty Images, Shutterstock, Pond5, and Videoblocks.
Music by Epidemic Sound: epidemicsound.com/creator
Tonic and Energy by Elexive is licensed under a Creative Commons Attribution License
Source: • Elexive - Tonic and En...
Video by Grady Hillhouse
Edited by Wesley Crump
Produced by Ralph Crewe
Graphics by Nebula Studios

[@PracticalEngineeringChannel]

⚡All my water demo videos in one playlist: kzbin.info/aero/PLTZM4MrZKfW_XJht-K7a9_egIsFqze0nQ 📰Compare news coverage from diverse sources around the world on a transparent platform driven by data. Try Ground News today and get 40% off your subscription: ground.news/practicalengineering

[@FuncleChuck]

Wow, your sponsor seems really interesting this week!

[@skylareckdahl2845]

Question: Do fish ladders really work 🤔? Answer: WE'RE TRYING! OK?! (he said calmly)

[@EuroWarsOrg]

Once fish make it to the top of the dam, does the noise and current of water falling over the dam not attract them? How do they know which way to continue?

[@lonjohnson5161]

Could you do an episode on potholes? Feel free to come to Minnesota; we have some fine examples of these serious road hazards.

[@mfulan7548]

Is that so hard for you to citing the sources for every your videos? Why so useless?

[@mepoindexter]

I'm glad you didn't post this yesterday, no one would have believed that fish can climb ladders.

[@nian60]

Except everyone that heard about fish ladders years ago.

[@ForTheJerusalem]

Personally, i find the idea of a fish who can climb ladders offensive.

[@chiefkeith5641]

@@nian60false

[@canis2020]

Yeah. Thank God. Because we all know they prefer the stairs. They have a fear of heights.

[@bubaks2]

Why? Did something happen since yesterday?

[@dragonwithafez]

There's a fish doorbell in the Netherlands too! They have a webcam set up with a livestream so people can ring the doorbell when there's fish waiting to pass through the boat lock

[@roelieboy204]

Visdeurbel!

[@danielreed5199]

@@roelieboy204 I never knew that I could read Dutch until now. Dutch is just badly spelled English with the whitespace removed :P Similar to German :)

[@roelieboy204]

@@danielreed5199 Sadly it's a bit more complicated lol. But some words do sound similar.

[@titaniummechanism3214]

That has to be one of the most adorable things of all time

[@kaiserruhsam]

@@roelieboy204 i once heard the languages described as sounding like someone is having a stroke to a monolingual speaker of the opposite one

[@celesteelka]

1:50 "You've probably seen a fish ladder before." I appreciate the confidence you have in me but no I've never seen a fish ladder before.

[@WallaWallaUSACE]

You can come visit ours for free :) From October to April, our doors are open Monday through Friday, welcoming visitors from 9:00 am to 4:00 pm. Then, during the warmer months from May to September, we extend our hours to seven days a week, still from 9:00 am to 4:00 pm. No appointments are required; simply drop by at your convenience. In this video, Grady takes you on a journey to McNary Lock and Dam, nestled along the picturesque Columbia River in Umatilla, Oregon. While there, explore the intricate fish ladders, just one of the many marvels awaiting discovery. Don't forget, we also feature fish ladders at four other captivating projects along the Lower Snake River.

[@JP_TaVeryMuch]

​@@WallaWallaUSACE Seriously? Snakes and Ladders. Brill!

[@grn1]

He showed one in another video not long ago so chances are most of his subscribers have seen one (in a video) before.

[@evergreentree8042]

Until I started watching this video I'd never even heard of them.

[@zamiyaFlow]

"A big part of engineering, is fixing the problems we've created in the past" If only more engineers would see it this way

[@Skullair313]

And by doing so, we create different problems future engineers will have to solve

[@leandersearle5094]

@@Skullair313 Steady employment.

[@inuendo6365]

Many of us do, we want to innovate! But the NIMBY crowd, greedy land/resource stealing corpos and shady politicians who employ us don't

[@randy-x]

😂

[@YT_WTML]

Hi Grady, can you create a series of engineering used in High rise plumbing. How the pipes don't burst when buildings flex. How the pressure is controlled for each floor etc.

[@KarlFredrik]

That would be awesome!

[@282XVL]

+1 Vote for this!

[@_Doodle-bob]

Adding my comment and voice to push this idea along.

[@HP-ys9fd]

I vote for this too

[@StreuB1]

INDEED!!!!

[@DW-indeed]

Fish reach the processing plant, the way is guarded by Gary the gatekeeper who offers a choice: You can be processed into fillets and other fish based products, or go upstream to procreate and further your species. Which do you choose...the former, or the ladder?

[@LetsTalkAboutPrepping]

This is good.

[@mfaizsyahmi]

This comment wins today's Internet.

[@alexgiesbrecht531]

Lol this is legendary

[@skyfiter99]

I feel like I owe you money now, in a good way. To compensate for my lack of options to compensate you, please imagine me throwing pennies at you.

[@BromideBride]

My instant reaction to the video was to write gag, but I bow to your comedy superiority. 💯🏆

[@swissfreek]

I love your self-deprecating humor, from the "engineer who dressed himself" to the "nothing like a grown man playing with a fish in his garage" comments. Always fun and informative videos.

[@connorbrennan4505]

I'd call it more self-aware and willing to make some fun of himself, more than self deprecating. Nothing wrong with any of those things!

[@MurcuryEntertainment]

USA: We need a carefully tuned, complex piece of infrastructure so as to not interrupt fish migration. Germany: FISH DOORBELL

[@user-ym4sn2oz8r]

It’s the Netherlands but Germany probably has something similar

[@Skyl3t0n]

@@user-ym4sn2oz8r We have fish ladders in germany. We call them fish "stairs". But i guess somewhere might be something like a doorbell. idk

[@SpaceLordof75]

Cue “the salmon disguised in a trench coat taking the stairs” Far Side.

[@qwertyTRiG]

A queue of salmon?

[@Pyth110]

cue

[@user-ym4xy6us5e]

The word is cue, not queue. A queue is when we line up and wait, like at the supermarket checkout. A cue is a signal that an performance or action should occur, such as when a film director shouts "Action!" or "Cut!"

[@SpaceLordof75]

Ok then, cue.

[@raumfahreturschutze]

@@user-ym4xy6us5e Huh. I did not know that usage. Thanks!

[@nik94492]

"Engineer dressed himself today" XD I once got a compliment for my dressing at a family party and i had to say "My girlfriend dressed me." Same energy

[@LetsMars]

Study for my mid-term ❌ Learn about fish ladders ✅

[@peter5.056]

I read the title without my glasses on and I spent more time than I care to admit, trying to figure out how fish-ladies work.

[@lordfelidae4505]

Mermaids.

[@Soggstermainia]

Can you do a short on how you make your display tanks. What materials you choose and why, challenges and mistakes that can be made and what you use to create the colour, glittery effect and maintenance. Your displays are always so good!

[@PatrickKQ4HBD]

I second this request!

[@alfineranai6952]

third

[@cda32]

He made a video about them previously. It's really trivial anyway, some acrylic, glue, sealant etc. Loads of other videos about it

[@liambohl]

Nobody learns from KZbin shorts

[@ryanjoseph.51]

as a fish, i can confirm this

[@wesleyestelritz202]

How is your comment 7 minutes old, and the video 5 minuted old 😂

[@adnanalam6201]

​@@wesleyestelritz202nah it's 1 minute after the upload of video

[@nightowl8163]

blup blup blup.. blup blup ?

[@bartsanders1553]

As a ladder, it'd be nice if you just said thank you on your way up.

[@zumabbar]

you're god dam right

[@think_like_a_fish]

Aerial fish stocking does work, at least in certain circumstances. In Utah high elevation lakes that are inaccessible to trucks are routinely stocked from the air with very small trout. The fish are usually less than 2" in size and survival is well over 90%. Obviously a larger fish would just go splat, but the little ones almost float down like leaves.

[@hyruleright4776]

*me watching the demonic-looking lampreys sidle up the ladder* "Are we 100% sure we want all types of fish to be able to travel upriver?"

[@malapertfourohfour2112]

Yes, they are cleaners 😇

[@thegurw1994]

That's like saying you don't want custodians to clean the schools our children attend

[@Alex-vl1mk]

​@@malapertfourohfour2112Oh so that's why they were attached to the glass. The more you know

[@gherkinisgreat]

​@@malapertfourohfour2112They're parasites, they have a circular row of teeth and latch onto larger fish using them to feed

[@thekinginyellow1744]

Just so you know, lampreys have been known to climb walls - out of water - so just add that one to your fear book.

[@LaCorvette]

It's really impressive what lengths these engineers go to create efishient designs to solve sofishticated natural problems. I wasn't even aware of these efforts before watching your last two videos.

[@speckle2592]

Thumbs up for the puns 👍

[@WallaWallaUSACE]

Thank you!

[@PaulTomblin]

You and Smarter Every Day are two of my favourite youtubers. I feel like the two of you could do a subject and the two of you would make completely different and both completely fascinating videos.

[@PatrickKQ4HBD]

100% with you.

[@The_Pariah]

You have a really nice demeanor and you're easy to listen to. I know you've probably been told this before, but it really is true. I genuinely enjoy learning from your videos.

[@cruisinguy6024]

In a time where so many talking heads and KZbinrs have terrible speaking skills this channel is so refreshing.

[@wintermath3173]

I would love to hear more ecological engineering stories!

[@epicgamer18723]

_"Engineer dressed himself today."_ I felt that.

[@SteveWhisenhant]

Dropping fish from airplanes is THE latest grocery store promotion from WKRP in Cincinnati

[@devon-crain]

I would love to see more videos related to this intersection of environmental impact and engineering, really enjoyed this one. I also deeply appreciate that you have manually subtitled most (all?) of your videos!!

[@devon-crain]

auto-generated subtitles never seem to keep up with my preference for 1.5x playback speed

[@andrewzaborowski3832]

Surprised you didn't include the Ballard Locks in Seattle while you were up in the PNW. Its an interesting example of a fish ladder that exists at the fresh/salt water boundary, and it mostly serves salmon descended from ones that were introduced by humans to replace runs we destroyed in the process of diverting rivers to construct the Ship Canal and locks. There's a publicly accessible viewing window near the top of the fish ladder if you are there during the migratory period, and the surrounding site hosts a small botanical gardens. Plus, the boat locks themselves are pretty interesting to anyone watching this channel!

[@bothellkenmore]

I was totally thinking of posting this, glad I scrolled. I'd add that after the Seafair hydroplane races are over there's a parade of boats headed to the locks with drunk people on board and it can be amusing.

[@camtonyray666]

The contrast of this level of ingenuity dedicated towards animals of a different species for survival while on the opposite side of the planet there are same-old-same-old strategies to eliminate the species of our own kind is uncanny.

[@cupguin]

I'm not saying my cat showed up just because you kept saying fish but I am saying I am starting to think my cat understands the word fish...

[@scarybaldguy]

Today's fish is Trout a la Creme. Enjoy your meal.

[@obnoxiouspedant]

no it didn't

[@walteramerling]

Your cat monitors your KZbin activity. RUN

[@janTasita]

@@scarybaldguy I will!

[@jessiejanson1528]

I have 4 cats, each is a rescue, but they all know their name and certain words.

[@birdrocket]

It’s fascinating that fish ladders are seen as essentially necessary for dams due to the fragmentation of their habitat, but the vast majority of roads through wild areas have no such consideration for wildlife. Habitat fragmentation from roads is an enormous problem, the book “Traffication” is all about how roads have destroyed natural habitats and created pockets of gene pools that don’t cross those roads.

[@a2e5]

In a good number of places, wildlife bridges / underpasses can now be economically justified by the cost of car-animal crashes. Sad, but at least it gets them built.

[@birdrocket]

@@a2e5 unfortunately that’s only a small subset of the problem. Large animals like deer might cross a street, but smaller slower animals might not make it across, and many don’t even try, keeping them locked in a tiny genetic pool that is the island of wilderness locked in by roads on all sides

[@a2e5]

@@birdrocket yeah. the deer in this case works like a flagship species for wildlife bridges. except instead of being out there attracting conservation work due to their cuteness (like the classical case, pendas), they’re out getting hit.

[@birdrocket]

@@a2e5 even where wildlife crossings exist, there are many animals that’ll never cross. Roadway noise creates like a mile buffer on either side for a lot of species

[@moldovancrisis5482]

Buffalo range got cut by railways

[@kuronosan]

1:22 Made me check my own collar, good catch.

[@glennvanderburg8708]

The scene at 2:41, presumably shot weeks earlier, makes me think the problem is with the shirt.

[@kxsmxnxn]

can't wait for the francis scott key bridge episode

[@jackiegalvez7606]

I'm a PhD student studying the impacts of damming on salmonid anatomy and evolution and I gotta say, I love your video! In every presentation, I always say that the most important thing we can do as scientists and engineers is find a balance between conservation and human need :) Lovely video! Made me so happy to learn more about fish ladders from an engineering perspective!

[@ars85202]

That's true and your PhD thesis sounds interesting, I have wondered myself about those impacts from the beginning of the video. I would add that, as a social scientist, one of the most important thing I can do is question whether or not our "human needs" are really needs for the working class and not just wants from the ruling class, and what are the real needs of the working class. One example is how the car and oil industries lobbied for car-dependent cities, creating an artificial need for their products at the cost of the working class. From the words of Chico Mendes, a Brazilian conservationist and climate activist, "ecology without class struggle is just gardening"

[@thedude7319]

humans although portrayed as destructive in a lot of media, rarely do they show the weird and fascinating this humanity does

[@killer5727]

apart from the fact the dams have meant we lost 20% of all salmon in the last 20 years. Although you are right at least we have tried to not fully prioritise the energy industry over the fishing industry in a fascinating way.

[@markmarco6277]

That fish with 7 portals pumping water in and out is mesmerizing. 3:13

[@thefriendlymadman229]

imagine designing, planning and building a fish ladder, then seeing fish just not use it.

[@monkaeyes3417]

Oh, oh I actually love your physical models so much. Thumbnail gets me every time I see one. So satisfying.

[@fishbaitx]

grady loves talking about the intersection of wildlife and engineering, and i love listening to grady talk about engineering :)

[@shadowprince4482]

It really is amazing how complex these need to be. Worked with plenty of fisheries biologists and fish ladders was always a hot topic. They work (kinda) when they do but they can super difficult to design perfectly and when they don't work they pretty much don't work at all.

[@aqdrobert]

Fish ascend ladders riding bicycles. Patrick Star said so.

[@Odima16]

Thank you so much for covering this! I would love to see more videos about other types of wildlife crossings. For example, you could talk about bridges for land animals to cross the roads we build. I'm also very curious if there are any other laws similar to Washington's that require the consideration of wildlife when building land structures.

[@philrabe910]

Thanks Grady! The last video did indeed leave me with lots of questions! I've always been fascinated by fish ladders after a childhood visit to a dam in the Smoky Mountains? I think. It certainly wasn't in FL where we grew up.

[@worawatli8952]

In my country, people say fish ladders are a scam, now I know that it's not that fish ladders don't work, it's that badly designed fish ladders don't work.

[@ericjohnson5617]

I would argue as Wa res that poorly designed worked too. I've seen reduced numbers from early 90s, long after dams. There's a fish cannon somewhere too. They figure out how to catch a ride, one way or another.

[@user-ze7sj4qy6q]

what is your country? i had never even heard of them til this video so its almost hard to imagine theres a place where they're not only known but controversial lol

[@ericjohnson5617]

@user-ze7sj4qy6q does it matter? Bad engineering hasn't stopped all fish. Sure 5% more up river IS better. What if another protected species, sea lions/seals, impact 10% of returns? Let's focus on stuffs that peoples feels betters abouts... ssilly

[@Mike_Rogge]

In my hometown the deficiencies of fish ladders were used as somewhat of a scapegoat to avoid the city council admitting that the local native tribe had killed all the remaining fish.

[@ericjohnson5617]

@Mike_Rogge shocking. That NEVER happens... treaties should be followed AND let's do best by our environment... hydro power is great, ask Wa state about how much it BUYS BACK from Canada

[@ihaveanunorigionalname]

i had a student today and i mentioned about practical engineering when we were talking about stabilized soil and he was like I LOVE THAT CHANNEL! needless to say i gave him his max points for the day!!!

[@dankirk4186]

An educator that can’t capitalise an I. I call bullshit.

[@sheilam4964]

Thx for doing this, filming it and sharing it with us

[@jimurrata6785]

I LOVE watching our fish ladder! ❤️ Our dams out in the Northeast aren't nearly as tall, but it's still amazing to see what fish do to mate

[@fultzjap]

If you judge a fish by it's ability to climb a ladder, it will live it's whole life believing it's a roofer.

[@cheythompson740]

Dam this is a very filling video

[@wunderzuvy4122]

Absolutely enthralled in these latest videos about designing for wildlife crossings. Would love to see more!

[@middlenameminecraft]

I really like hearing about the intersection between engineering and environment topics. Love the videos, always happy when a new one comes out ❤️

[@wouterx10]

How do human ladders work?

[@gustavooliveira1921]

Left foot, right foot, levatating

[@LetsTalkAboutPrepping]

A series of tubes

[@ASaltyAcc]

Basing my info off the fish ladder. Attain ascension to use human ladders.

[@karthikupadhya]

How do human fish work?

[@jamesengland7461]

They don't work; they just lean there. We have to do the work.

[@johndoh5182]

So now I've envisioning a fish elevator, elevator music and all. Maybe you CAN train fish to use an elevator if the ones that survive that ordeal are the ones who produce the most offspring. Then you could just blast elevator music into the water near the entrances.

[@glenns5627]

"Engineer dressed himself" LOL! Thanks for your Pleasant and ALWAYS informative productions, I loved that touch of humor!

[@marcfruchtman9473]

Thank you for this information. I like that vertical slot design!

[@DW-indeed]

Duh, they consist of very small rungs so the fish can use their fingers 😉

[@zainmudassir2964]

Fins 😊

[@JayWC3333]

And feet...

[@Nobody-vr5nl]

Fin-gers

[@robertridley-fj8zz]

@@Nobody-vr5nl Fishfingers, the British name for Fish-sticks.

[@alexrogers777]

you know it's gonna be a good video when he makes a scale model 🗣🗣🗣💯🔥

[@michaelgriggs8552]

Grady, I have been following from the early days on KZbin. You're doing great, man!

[@treich1234]

Nice job Grady The thorough attention and descriptive detail you put together for us is greatly appreciated. Your content keeps getting better,,,,,,Cheers from one happy subscriber :-)

[@anthonytimpson4975]

have you seen the video of the dead fish swimming upstream? the vortices that roll off the sides of the fish cause it to swim against currents, even while 100% dead. Seems like it is easier for fish to swim upstream than we imagine.

[@clint9027]

Civils and fish in one video!!! Thank you just thank you. 👊🏽

[@matthew1182]

They work like magnets.

[@AndrewCedergren]

As someone who often gets tours and meetings with brilliant people, do you find that people are open to showing what they love and where they work to others freely or do you flex your social media influence? I'd love to go to places like this and ask for a tour on how these work.

[@LetsTalkAboutPrepping]

It's unlikely that Grady hides the existence or prominence of this channel when approaching institutions for collaboration, so that definitely plays a part in the considerations of the other party. Grady has all the credentials to provide a very attractive pitch to any institution; I'm sure alot of that attraction IS the passion of the experts and their desire to share their field of expertise with the world at large, but another attraction would be visibility for their institution itself. All good things

[@lukemacisaac936]

This video makes me want to volunteer with my local fishing association. They do a ton of work on managing migration routes for Atlantic Salmon in my city. Thanks for such a fun and educational video! 😃

[@BackyardBeeKeepingNuevo]

Thanks for posting this Grady. I had no idea how fish ladders worked nor really thought about it too much even though I have been a fisherman for over 52 years.

[@thirdpedalnirvana]

I love discussions about ef-fish-ency

[@Diamant254Music]

Did you know that Sweden has a fish accelerator?

[@user-ym4xy6us5e]

They accelerate fish to high speed and smash them against one other, then examine the splatter for evidence of new kinds of fish that are theorized to exist.

[@PatrickKQ4HBD]

​@@user-ym4xy6us5e Relatifishstick particles?

[@suburbanbiology]

I'm liking how this topic covers how engineering can work for species other than humans. A new way of looking at things. Strong work and good topic. Thanks Grady!

[@andreamundt]

Love your style of presentation! I could listen to your talking all day. 🎧 ( highly sensitive person & musician here)

[@Wes12940]

"we've even tried dropping fish from airplanes" Can't wait for that video.

[@submachinegun5737]

Fish air strike is the peak of military technology

[@volvo09]

Look up videos of "stocking lakes by airplane" . Pretty interesting

[@jackhammer_au9961]

As a disabled fish I prefer to use the fish elevator.

[@lmzaadi]

I want to see a fish ladder. I guess it’s weird but it’s on my bucket list. I absolutely loved this video. You’re so talented, you help me (no background in engineering) understand how things work like never before.

[@99heather99]

Thanks for the great captions!

[@xkillaguerillax9733]

I can't be the only one that read the title as "Finnish Ladders". I was like, "let's see what these Finnish Ladders are all about" *clicks video* Oooooh, fish ladders....that makes more sense.

[@edited1325]

Can’t relate

[@malik740]

Martincitopants alt account?

[@hondahirny]

I’m glad you Finnished that joke. I’ll let myself out 😂

[@edited1325]

@@hondahirny yikes

[@bopsquad]

@6:08 “Most fish can’t climb actual ladders”. Are there any fish that can climb ACTUAL ladders??

[@SilverStarHeggisist]

Yes, Mud skippers can climb ladders by extension of being able to climb trees

[@Soundhound101]

Cool stuff. I always figured fish ladders are custom engineered for each project that they're required. Thank you kindly as usual Grady. 👍

[@hanzazazel412]

The editing and infographics on these videos are top notch

[@nerd26373]

Fish ladders are meant to make the job much more accessible and convenient to fishery workers.

[@Likeomgitznich]

I’m more of a fish cannon man myself.

[@MrHemlock51]

I was watching a documentary about the River Danube last night. Apparently the Iron Gates Dam has had a catastrophic effect on Beluga migration and so caviare production. It must be difficult designing a fish ladder for something the size of a beluga.

[@UltraMagaFan]

I've had the opportunity to visit the St Stephen fish lift in Berkeley County, South Carolina. It's impressive. The people that run that thing do a fantastic job and help greatly with conservation. Hundreds of thousands of striped bass and American shad swim through it each year and spawn. If any of you guys are ever in the area when the fish are running and ever get the chance to tour it I recommend it. They have viewing windows in the fish lift so you can see the fish swimming through it.

[@randomuser2468]

Something is fishy here.

[@madmartian2]

Please leave the internet. 🤦‍♂️🤦‍♂️🤦‍♂️

[@toffermyc1999]

Well, yes!

[@heorbi]

I'm an environmental engineer. I really like this ecological content. Maybe you can tell something about bioengineering. Protect coastline and Riversides with living materials.

[@LMacNeill]

I can't imagine the number of hours of trial-and-error that went into these designs. That's a *lot* of work, right there. And I'm sure those designs are being refined even now, as the engineers and scientists learn more and more about these ecosystems.

[@stefanschneider3681]

Always so enjoyable to watch your videos, you really have a talent in communicating 😊👍!

[@bfattori01]

Thanks, Grady! I always look forward to your videos dropping on KZbin because I will undoubtedly learn something and then some thru the comments.

[@thomasgeorge815]

Thanks for sharing you're quest for knowledge with us.

[@Dr3450]

Nice shot of Shasta dam in the beginning! I grew up about 5 minutes from there.

[@laceyaryn]

fun fact: with washington state, we love our hydroelectric dams (with understanding on my end) which also makes to understandable with fishway/ladders to be put in the designs of the state dams

[@Tracomaster]

I love these! As much as a tragedy the bridge in Boston is, it too will be a great engineering challenge I hope to see on here some day

[@svatsideas]

Thanks for uncovering this mysterious topic. I really appreciate it

[@michaelbrennan5409]

The fact that you mentioned a dam that I see every time I go on a long drive makes me happy somehow

[@whitenat000]

You should do one on the Cle Elum Fish Passage, I helped a lot with the trenchless installation

[@bluefish537]

Thanks for this topic!

[@anthonywhitehead9660]

Can't wait to see your video on the Francis Scott key bridge failure.

[@V77710]

I've been waiting for this video since your previous dam video

[@Nobody-vr5nl]

I remember being a kid and seeing the lamprey at this dam in oregon. Its cool to see a video about this +20 years later.

[@leosanchez1576]

As usual, you have given us a very interesting and useful summary. Thanks.

[@IngieKerr]

One day some clever fish will invent the fish elevator, and they'll be rich beyond their little fishy dreams.

[@lank_asif]

I love your post so much. Thank you!

[@sanojsahu9875]

Thanks. Pls make a video on sedimentation, silt removal and solutions of dams

[@TeddyR_Official]

In Sacramento, there’s a fish hatchery by the American River right before the Nimbus dam (a downstream dam off Folsom Lake). In the hatchery, they rebuilt the ladder with glass windows, so visitors can actually see the chinook salmons and steelheads. If you’re in the area, or just passing by to/from Lake Tahoe, go visit the Nimbus Fish hatchery.

[@IronFist9595]

Yay, thanks for the video!

[@ryanrutledge922]

So interesting how the sounds of water affect fish behavior. Great content . ❤ from 🇨🇦