When?   10.10.2012 - 05.11.2012

Where?   Rožnov pod Radhoštěm, Czech Republic

The Beaver Deceiver (a trapezoidal shaped culvert fence) was invented by Skip Lisle (http://www.beaverdeceivers.com/) in the 1990s while working for the Penobscot Indian Nation in Maine. It is very effective at completely eliminating beaver damming of a culvert. It works in three ways. First, the perimeter of the trapezoidal fence is typically 40 – 50 feet long, making it difficult for a beaver to dam the entire fence. Second, as beavers try to dam the culvert, the fence forces them to dam in a direction away from the culvert, which is not their nature. Third, as they dam further out on the fence, the opening of the stream it is flowing into is getting wider. Therefore, the damming stimuli of the sound and feel of moving water decrease the further they dam on the fence. If the sides of the fence are at least 12 feet long the beavers will generally leave the fence alone. (http://en.wikipedia.org/wiki/Flow_device).