On June 5, 1976, eastern Idaho woke up to a dam collapse on the Teton River. The new Idaho Experience documentary “Teton Dam Disaster” revisits the red flags that were ignored, the wall of water that erased towns, and the lives that were forever changed when the earthen structure gave way as the reservoir was being filled. The failure released 80 billion gallons of water, killing 11 people and causing more than $1 billion in damages. Through survivors’ voices and rare footage, the documentary asks how this disaster happened and what it still teaches us about trust, power, and nature. It’s a human story of loss, accountability, and resilience.
For the documentary’s producer Joan Cartan-Hansen, the day is more than a story in a history book. “I lived through it,” she shares. “It’s one of those moments that becomes a marker in time. There’s life before the Teton Dam flood and life after it.”
While many remember the devastation that occurred when the dam collapsed 50 years ago on June 5, 1976, Cartan-Hansen explains that the impact reached far beyond eastern Idaho.
“Because of what happened here, Congress required a review of dam safety across the country,” she says. “Those safety protocols are now used worldwide.”
But what stays with her most is not just the failure, but also what followed.
“There was no FEMA then,” Cartan-Hansen recalls. “People just showed up to help, with food, tools, whatever they had. It was an extraordinary example of people helping people.” The response reflected something deeper about Idaho itself.”
“It really showed that sense of community, how people band together,” she says. “That’s how we got through it.”
“Teton Dam Disaster” on Idaho Experience airs Thursday, June 4, at 8:30 p.m. and again Sunday, June 7, at 7:30 p.m. on Idaho Public Television and through the online Live TV link at idahoptv.org. The documentary will be available for on-demand streaming beginning June 4 at video.idahoptv.org.
