What is the most striking beaver dam?

Most of the dams mapped 150 years ago are still there, a credit to beavers' craftsmanship. ... That evidence comes via an 1868 map (see below) commissioned by Lewis H. Morgan, a prominent American anthropologist who also worked as a railroad director. read more

There's this beaver dam that is the largest ever recorded. Found in Canada and spanning 2800 feet (853 meters), this dam is remarkable for being able to be seen from space, unlike the Great Wall of China. read more

Beaver dam building is a pretty fascinating topic. Unfortunately, no-one really knows how beavers evolved, let alone how dam building behaviour evolved [1] Here's a good fact though - the biggest known beaver dam is a whopping 850 metres long and is situated in Alberta, Canada [2]. read more

By raising the stream level, the gradient of the surface of the water table above the beaver dam is reduced, and water near the beaver dam flows more slowly into the stream. This further helps in reducing flood waves, and increases water flow when there is no rain. Beaver dams also smooth out water flow by increasing the area wetted by the stream. read more