Located between Fremont and Madison counties, it suffered a catastrophic failure on June 5, 1976, as it was filling for the first time. The collapse of Teton Dam killed 11 people [5] and 16,000 livestock. [6] …

When Teton Dam failed, the reservoir was 270 feet deep (at the dam) and drained in less than six hours. The filling and the subsequent rapid draining of the reservoir triggered more than 200 landslides in …

Jan 15, 2026 · Ultimately, the dam’s collapse spilled 80 billion gallons of water into eastern Idaho. The results were devastating. Eleven people died in the disaster, along with 1,500 head of livestock....

Less than one year later, the dam experienced catastrophic failure on June 5, 1976 during its first filling. Failure of the Teton Dam and subsequent draining of the reservoir caused the deaths of 11 people …

The collapse led to the establishment of stronger dam safety regulations. The side of the dam that failed was built on highly fractured, permeable welded ash-flow tuff that erupted from Yellowstone 2.1 …

Erupting one peaceful Saturday morning, the failure of this dam destroyed several towns, killed 11 people, drowned over 15,000 heads of livestock, and damaged over $2 billion of property in the area.

May 20, 2019 · Of the 23 presidentially declared disasters in Idaho, the Teton Dam’s collapse remains the only man-made disaster. This engineering marvel meant to tame flooding along the Teton River …