Longest beaver dam
Last updated: December 18, 2017 at 4:47 am
850 m (2,790 ft), Wood Buffalo National Park (Alberta, Canada) – The world’s longest known beaver dam was discovered with Google Earth 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 a long dam to contain the wetland waters. A typical beaver dam stretches less than 100 m (328 ft).