Beavers are a type of rodent that are attracted to bodies of water. While they appear cute and benign, they can cause significant damage in the wrong setting. Beavers are known to build dams in waterways, resulting in floods that can wreak havoc on trees, crops, residences, and roads. These floods can also contaminate water supplies and cause other drainage issues. Humane removal of a beaver colony is best done with the use of a professional beaver trap.