Longest beaver dam
Last updated: April 13, 2020 at 14:50 pm
850 m (2,790 ft) — The world’s longest known beaver dam was discovered in Wood Buffalo National Park (Alberta, Canada) on October 2, 2007. Satellite photos from the 1990s and 70s indicate that the dam was constructed by successive generations of beavers starting sometime after 1975. Because this part of Wood Buffalo National Park is flat, the beavers had to build an extra long dam to contain the wetland waters. A typical beaver dam stretches less than 100 m (328 ft).