||Poorly designed culvert protective fences like this one by a railroad can actually make it easier for beavers to dam and cause flooding problems.
Road Culverts are the most common beaver damming sites we see.
To a beaver, a road bed with a culvert pipe probably looks like a hole in a large dam. Since beavers have an innate ability to plug leaking holes in their own dams, they are also very good at blocking water flowing through road culverts. By blocking a culvert beavers can easily create a large dam and pond. A blocked culvert can quickly flood road causing a public safety issue, and can be a significant drain on limited manpower and financial resources.
Historically, trapping was the most common method used to protect culverts from beavers. While still practiced, trapping is typically done reactively after a culvert is already blocked and a potentially expensive and/or dangerous flooding issue already exists. In addition, since the habitat remains unchanged following trapping, new beavers usually relocate to the trapped area within a year or two. Therefore, trapping is usually only a short term solution.
Fortunately, properly designed and constructed culvert protective devices have proven to be extremely effective in eliminating culvert damming by beavers. Our CulverClear™ flow devices have a 98% success rate (see Beaver Solutions Studies ). Different CulverClear™ types include: Culvert Protective Fences, Fence and Pipe Devices, and Diversion Dams. They are so effective and low maintenance we can Guarantee them.
Effective flow devices are custom designed and constructed to account for the unique characteristics of each site. (see Self-Help DVD). Some variables that affect design include: stream flow, culvert type and size, streambed topography, presence of other beaver dams, beaver food supply, the sound and movement of water in the culvert (important stimuli for beaver damming), the potential for other upstream or downstream flooding conflicts, and the previous use of poorly designed flow devices by others.
Following this site evaluation it is possible to select the type of flow device which will protect the culvert from beavers in the most cost-effective and long-term manner. (See How-To DVD). Since nearly every culvert can be effectively protected for many years with a CulverClear™ device, the short term solution of trapping is rarely needed.