Loading summary
Lindsey Graham
There are more ways than ever to listen to History Daily ad free. Listen with Wondry plus in the Wondery app as a member of Noiser plus at noiser.com or in Apple Podcasts. Or you can get all of History Daily plus other fantastic history podcasts@intohristory.com It's 5pm on the evening of October 9, 1963. In Langarone, a small village in the Piave Valley in The Italian Alps, 12 year old Michaela Colletti tries to enjoy a quiet dinner with her family, but there's tension in the air. Rumors have been circulating around town about serious problems at the Bayant Dam where her father works. Three years ago, the dam was built in an area prone to landslides, and many speculate that disaster is just around the corner. Over dinner, the discussion between Michaela's parents turns heated. Her mother ominously suggests that it might be better to send the kids away, but her father disagrees. He slams his fist on the table and declares that if the dam collapses and the family must die, it would be better to die together. Terrified, Michaela stays silent as her father abruptly stands up and walks out the front door, headed to the dam for a late shift. Michaela wordlessly helps her mother clear the table before walking to her room. As the hour grows late, she gets into bed and pretends to sleep, waiting for her mother to come kiss her goodnight. But before her mother can arrive, Michaela jolts upright at what sounds like a large thunderclap followed by an odd rumbling. As the sound grows louder, Michaela's grandmother enters the room and tells her a storm must be approaching. She closes the shutters on Michaela's window and at that exact moment, all the lights in the house go out. Then, without warning, Michaela feels her bed shudder. The floor is yanked out from under her and suddenly she's thrust high into the air as a 246 foot wall of water engulfs the village, washing away the Coletti's home and burying Michaela in debris. Michaela colletti will be one of only 30 children to survive the giant inland tsunami triggered by a landslide into the Vayant Dam's reservoir. Preceding the wall of water will be an air pocket so strong that almost all its victims will be found naked, their clothes blown off by the blast. Though the dam will survive, Michaela's parents, sister and grandmother, along with 2,000 others, will not. But this tragedy will not just be an unfortunate natural disaster. In its wake, old warnings regarding the dam's poorly chosen location and the area's well known risk of landslides will take on a new grapp gravity and the devastating tsunami will instead be labeled one of the worst man made environmental disasters thanks to the destruction it wreaks on October 9, 1963. Before we get back to the show, a super quick announcement. You've probably heard another super quick announcement recently that I'm hoping to hit the road with a History Daily live show and I told you to go to historydailylive.com to sign up for info. But that form was broken and some of you received an error message. It had something to do with a misconfigured SSL certificate causing a 301 redirect loop. And if you understand that I should have come to you when setting it up, but it's working now better than ever. So if you've tried before and did get an error message, please head to historydailylive.com and let me know your home city so I can plan this tour. And if you haven't tried before, please head to historydailylive.com and let me know your home city so I can plan this tour. That's historydailylive.com let's make history live and in person. Historydailylive.com we're well into the back half of the calendar and these cooler days call for layers that last and Quince is a go to for quality essentials that feel cozy, look refined and won't blow your budget. Think $50 Mongolian cashmere, premium denim that fits like a dream, and luxe outerwear you'll wear year after year. These are the pieces that'll turn into your fall uniform or Quince's wool coats. They look designer level but cost a fraction of the price because Quince partners directly with top tier ethical factories cuts out the middlemen, delivering luxury quality pieces at half the price of similar brands. It's the kind of wardrobe upgrade that feels smart, stylish and effortless. And it's not just for adults. Recently we updated my daughter's back to school look with a new hoodie, some wide leg, fleece pants and even a bracelet that she's yet to take off. Find your fall staples at Quint's. Go to quints.com historydaily for free shipping on your order and 365 day returns. Now available in Canada too. That's Q-U-I-N-C-E.com historydaily to get free shipping and 365 day returns. Quince.com historydaily.
Capital One / AT&T Advertiser
This message comes from Capital One. The Capital One Venture X Business Card has no preset spending limit, so the card's purchasing power can adapt to meet business needs. Plus, the card earns unlimited double miles on every purchase, so the more a business spends, the more miles earned. And when traveling, the VentureX business card grants access to over a thousand airport lounges. The Venture VentureX business card what's in your wallet? Terms and conditions apply. Find out more@capital1.com venturexbusiness.
Lindsey Graham
From Noiser and Airship, I'm Lindsey Graham, and this is History. Daily. History is made every day on this podcast. Every day, we tell the true stories of the people and events that shaped our world. Today is October 9, 1963 the Bayant Dam disaster It's November of 1960 in northern Italy, three years before an inland tsunami will ravage Italy's Piave Valley. Italian engineer Carlo Simenza watches carefully as the water level of the reservoir behind the Vaillant Dam begins to rise. For the past three years, Carlo has been hard at work overseeing the construction of the dam, but the project has been in development far longer. Way back in the 1920s, Carlo started designing the structure he wanted to build the tallest dam in the world, something capable of harnessing three of the region's rivers to meet Italy's growing demand for power and industrialization. But as the country fell into social and political turmoil under dictator Benito Mussolini, the project was put on hold. It took until 1943 before the dam was approved by the Italian government and until 1957 for construction to even begin. Carlo has operated as the brains behind the operation, planning the miles of concrete pipes and bridges that will stretch across the Vaillant Gorge. But it is actually the Adriatic Electric Company that has overseen the project. Launched in the 1800s, this company is the brainchild of Italian engineering professor Giuseppe Colombo. Colombo, an admirer of Thomas Edison, successfully secured exclusive licenses to some of Edison's patents and began using them to build power generating projects around Italy. By the 1950s, the Adriatic Electric Company had grown into a monopoly, controlling power distribution across most of northern Italy. The Vaillant Dam became one of its most ambitious projects, and the powerful Adriatic Electric Company was able to successfully acquire the land needed for it, despite resistance from residents of the valley communities below. The locals were concerned because the Vaillant Dam was to be built adjacent to Mount Talk, known to locals as the Walking Mountain for its frequent landslides. But those concerns were overruled, and the dam now stands as an impressive feat of engineering At a height of 860ft, it is the tallest dam in the world built to this point. And it's sure to provide much needed electricity for the fast growing country and to become a major employer in the area. But still, there is a problem. As part of his engineering work, Carlo hired his son Eduardo to conduct research on the area's geology. And in doing so, Eduardo discovered a significant ancient landslide that he believed was likely to repeat itself. He drew detailed maps, took photos and presented his findings to his father, who in turn presented the data to the Adriatic Electric Company. But the semenza's concerns were given little weight. Unfazed by the research, the Adriatic Electric Company instructed Carlo to proceed with the project. So he did. And within three years, in February of 1960, the dam was built and the Adriatic Electric Company received authorization to begin filling its reservoir. But the potential hazards his son Eduardo revealed lingered in Carlo's mind. Over the summer, Carlo and his team continued to observe landslides and earth movements, and the project began to attract the attention of journalists. The media scrutiny was quickly shut down by the Italian government, which pursued legal action for any unfavorable reporting. And since then, the project has moved full steam ahead. But there's no denying the risks surrounding the structure that Carlos, many others hope will be a post war economic miracle. Today, Carlo watches as the reservoir is filled to testing levels. It should be an exciting landmark in the dam's development. But Carlo is uneasy, and for good reason. As the water rises, a small landslide suddenly begins to fall from Mount Talk. It careens down a cliffside and right into the reservoir, where it generates a six and a half foot wave. Fearing the worst, Carlo immediately calls for the reservoir to be drained. His team begins to take down the water level slowly so the removal doesn't further destabilize the mountain. And once it's down to a safe level, engineers begin building a drainage gallery in the basin in front of Mount Talk to help redirect water in the event of additional landslides. Carlo worries this won't be enough to stave off disaster. It's clear to him that the Bayant Dams to still presents grave dangers to the residents below it. And over the coming months, Carlo will try to take further action, drawing his boss's attention back to the dam's risks and advocating for greater safety measures. But it won't be enough to prevent catastrophe. History Daily is sponsored by. Indeed, back in 1999, I remember reading Bill Gates book Business at the speed of thought. 25 years later and, well, the speed of business has only increased and that includes hiring. Sit around waiting for paper resumes to filter in. You need to find quality candidates right now because opportunity waits for no one. Which is why when it comes to hiring, Indeed is all you need. Their sponsored jobs help you stand out and hire fast. They get your post to jump to the top of the page for your relevant candidates so you can reach the people you want faster and it makes a huge difference. According to Indeed data, sponsored jobs posted directly on indeed have 45% more applications than non sponsored jobs. There's no need to wait any longer. Speed up your hiring right now with Indeed. Listeners of this show will get a $75 sponsored job credit to get your jobs more visibility@indeed.com onthisday just go to indeed.com onthis day right now and support the show by saying you heard about Indeed on this podcast. Indeed.com onthis day terms and conditions apply. Hiring Indeed is all you need.
Chico Felitti
Reese's Peanut Butter Cups. They go perfectly with music, podcasts and.
Lindsey Graham
Welcome back to the show. Even Nature San Sounds oh, and the thing where someone crinkles tissue and whispers at you. Hello. Look, I'm not here to judge what you listen to. I'm here to judge you for not eating Reese's while you listen to it. Reese's Ashley, Go back to the nature sounds. Nice. That's really nice. It's the morning of October 9, 1963, in the Italian Alps, three years after the Vaillant Dam was completed. In an area near the new dam, a group of engineers stand together as they begin to witness an unsettling series of events. Trees which had once stood strong now tumble down the mountainside while rocks roll into the reservoir behind the dam. Each splash and tumble forms an unnerving crescendo, and a palpable sense of foreboding grips the engineers. For years, researchers had warned of an impending landslide in this very location, and two years ago, the dam's designer tried to intervene. In 1961, Carlos Amenza submitted a letter to his superiors, calling attention once again to the ancient landslide his son discovered and to the small landslide that interrupted the reservoir's test filling. For Carlo, this was enough evidence that that landslides will occur in the future, and when they do, they could cause giant waves of water to rise over the dam and flood the villages below. In response to Carlo's letter, the Adriatic Electric Company built a physical hydraulic model to perform experiments on the effects of a landslide fall into the reservoir. In the first set of experiments, researchers used gravel to simulate a sliding mass. But they found it near impossible to reproduce the geological phenomenon of a landslide. So they turned to Carlo to make adjustments. As an innovative engineer, he came up with a number of solutions to help improve the research. But sadly, he didn't live to see his recommendations implemented. With the stress of the project continuing to wear on him, Carlo suffered a cerebral hemorrhage and died in October of 1961, leaving his son Eduardo to take over the work on the Vaillant dam. Experimental fillings of the Reservoir continued through 1962, and initial testing confirmed Carlo's hypothesis, demonstrating that the reservoir is indeed susceptible to landslides, which could lead to a catastrophic tsunami wave if not addressed. So the Adriatic Electric Company agreed to make even more changes. In July of that year, they decided to keep the Reservoir's water level 82ft below the top of the dam. According to their testing, this was a safe level, low enough that a wave generated by a landslide could not be breach the crest of the dam. The following year, the nationalization of Italy's power industries forced the Vaillant dam to change hands from the Adriatic Electric Company to the National Agency for Electricity. While Eduardo Semenza and local authorities in the Piave Valley continued to advocate for more research and push for preventative safety measures, the Italian government refused to take a step back. The dam was a major economic investment that they refused to abandon. And as the project forged ahead, communication between government agencies, engineers and local authorities reached an all time low. In the absence of a leader like Carlos Zmenza, numerous competing factions arose vying for power and management of the dam. All of this was exacerbated by the government who took steps to silence any journalists attempting to report on the realities and dangers of the project. The National Agency for Electricity was continued its narrative that the dam was fine and local residents had nothing to worry about. But many of the valley's villagers did not believe this. And as they started to notice more slides, shakes and movements of the ground, the residents raised alarm bells over the summer. But their worries fell on deaf ears and achieved nothing. So even as tremors continued to shake the valley, the new engineers in charge of the dam assured the public that everything was under control. But it quickly becomes apparent that it is not. The month prior, an earthquake shook Mount Talk and the entire mountain slide slid by almost 9 inches. A huge distance for a mass so big. Now the engineers cannot ignore the signs any longer. And today a complete landslide looks inevitable. A sense of dread hangs heavy in the air as they grapple with the realization that a long predicted disaster is unfolding before their eyes. Quickly, word will begin to travel through the nearby villages that something is amiss. Officials will try to ease the alarm, claiming that the dam's reservoir is low enough to prevent any major flooding. And uncertain of the dangers, most residents will stay put. No mass evacuations will take place, and though many will remain skeptical of their safety, few will predict the amount of damage and destruction that's coming.
Capital One / AT&T Advertiser
And now a next level moment from ATT Business. Say you've sent out a gigantic shipment of pillows and they need to be there in time for International Sleep day. You've got AT and T5G so you're fully confident, but the vendor isn't responding. And International Sleep Day is tomorrow. Luckily, AT&T 5G lets you deal with any issues with ease, so the pillows will get delivered and everyone can sleep soundly, especially you. ATT 5G requires a compatible plan and device. Coverage not available everywhere. Learn more@att.com 5G Network.
Chico Felitti
Everyone has that friend who seems kind of perfect for Patty. That friend was Desiree. Until one day I texted her and.
Lindsey Graham
She was not getting the text. So I went to Instagram. She has no Instagram anymore. And Facebook. No Facebook anymore.
Chico Felitti
Desiree was gone. And there was one person who knew the answer.
Lindsey Graham
I am a spiritual person, a magical.
Chico Felitti
Person which a gorgeous Brazilian influencer called Cat Torres, but who was hiding a secret from Wondery. Based on my smash hit podcast From Brazil comes a new series, Don't Cross Cat, about a search that led me to a mystery in a Texas suburb.
Lindsey Graham
I'm calling to check on the two.
Chico Felitti
Missing Brazilian girls, maybe get some undercover crew there.
Lindsey Graham
The family are freaking out. They are lost.
Chico Felitti
I'm Chico Felitti. You can listen to Don't Cross Cat on the Wondery app or wherever you get your podcasts.
Lindsey Graham
It's the evening of October 9, 1963, at a pub in Langarone. Patrons gather together to watch a European cup soccer game between Real Madrid and the Glasgow Rangers. Right now, they have no idea that high above the valley, a 1.2 mile landslide containing forest, earth and rock has begun to fall off Mount Talk. But as the clock hits 10:39pm, that quickly changes. The landslide generates a seismic shock and within 45 seconds the vaant Reservoir is overwhelmed. The water builds into a tsunami that sweeps through Longorone, destroying everything in its path. The patrons at the bar can hardly register what hit them as the water, filled with earth and debris, descends upon them. Firefighters and rescue responders struggle to reach the valley with a primary road completely decimated by flooding. When relief workers do make it to Langarone, they find a community utterly destroyed. When the damage is finally surveyed, Langarone and the surrounding villages are left in shambles, reduced to a flat plain of mud with an impact crater 200ft deep and 260ft wide. By the early morning hours, a major rescue was underway, with 850 divers, land and helicopter teams, combat engineers and firefighters working to find survivors. All told, an estimated 2,000 to 2,500 people will perish in the disaster. The Italian government will attribute the tragedy to an unexpected and unique, unavoidable natural event, but researchers and engineers like Eduardo Semenza know better. Ultimately, the largest share of the blame will fall on the Adriatic Electric Company and the National Agency for Electricity, who for years had seen and ignored research that suggested that a catastrophic event was likely. Though the valley's communities will eventually be rebuilt, they will be completely different from the old villages that were destroyed amidst the devastation. The Vaillant Dam will stay standing. Ironically, it will be one of the few structures that survives the tsunami, though it will subsequently cease operations. Today, the dam is a tourist attraction, the site of guided tours, a relic reminding observers of the immense loss of life that perhaps could have been avoided if more warnings were heeded before the landslide that triggered a calamity on October 9, 1963. Next on History Daily October 10, 2014 Two years after being shot by a gunman, 17 year old education activist Malala Yousafzai wins the Nobel Peace Prize from Noiser and Airship. This is History Daily Hosted, edited and executive produced by me, Lindsey Graham Audio editing by Mohamed Shazi Sound design by Katrina Zemrak Music by Lindsey Graham. This episode is written and researched by Scott Weiss. Executive producers are Alexandra Curry Buckner for Airship and Pascal Hughes for Noiser. It's okay not to be perfect with finances. Experian is your big financial friend and here to help. Did you know you can get matched with credit cards on the app? Some cards are labeled no ding decline, which means if you're not approved, they won't hurt your credit scores. Download the Experian app for free today. Applying for no Ding decline cards won't hurt your credit scores if you aren't initially approved. Initial approval will result in a hard inquiry which may impact your credit scores. Experian.
This gripping episode of History Daily, hosted by Lindsey Graham, explores the tragic events of October 9, 1963, when a catastrophic landslide at Italy's Vajont Dam (often Anglicized as “Vaillant” in the episode) triggered an immense inland tsunami that obliterated villages and claimed thousands of lives. The episode intertwines the technical, geological, and human narratives, revealing how a blend of engineering ambition, ignored warnings, and bureaucratic mismanagement led to one of history’s most devastating man-made environmental disasters.
[05:32] The episode flashes back to the early 20th century and follows Italian engineer Carlo Semenza, who began designing the world’s tallest dam to serve Italy’s industrial growth.
Despite fears, the project moves ahead, prioritizing economic advancement over local safety concerns.
[07:05] Engineering investigations reveal ancient landslides in the area.
Quote: “But the potential hazards his son Eduardo revealed lingered in Carlo's mind.” — Lindsey Graham [08:56]
[11:50] After Carlo’s death in 1961 (due to stress-related cerebral hemorrhage), Eduardo Semenza continues the safety campaign.
In 1963, Italy’s power sector is nationalized; communication between government, engineers, and locals collapses.
On Familial Tragedy:
On Suppressed Warnings:
On Design Flaws and Death Toll:
On Survival and Legacy:
Lindsey Graham maintains a concise, evocative narration throughout—mixing technical explanation with human empathy (“a relic reminding observers of the immense loss…”). The tone is solemn, respectful, and sharply critical of preventable mistakes and ignored science. Emotional resonance is achieved through personal stories (Michaela's), while larger historical forces (industrial ambition, bureaucracy, and scientific warning) are interwoven seamlessly.
"The Vajont Dam Disaster" episode delivers a compelling, cautionary tale about the dangers of ignoring scientific expertise in favor of short-term progress. Through vivid storytelling, carefully attributed quotes, and clear timelines, the episode honors victims and underscores the lesson that “progress” should never come at the expense of human safety.