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Beaver Dams

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From: Joe Sharon
Bloomingdale, IL
Our subdivision owns a large retention pond that recently attracted a family of beavers. They are causing two problems. First, they are downing trees. Second, they dam an overflow pipe structure which raises the water level of the pond. We frequently remove the dam, but that is not a long term solution. We believe that if we can prevent the damming of the overflow pipe structure, the reduced water level will increase the distance of the trees from the water which should reduce additional tree damage. What are the best options to prevent damming of the overflow pipe? We'd also like to know if there are any contractors that specialize in this type of work. We'd prefer not to trap because the beaver problem is not isolated to our area. Nearby subdivisions are having the same problems. If we trap the beavers on our pond, it is only a matter of time before other beavers would move in.

Extension Message
From: Laura Kammin
Visiting Extension Specialist, Pollution Prevention
Extension-Illinois-Indiana Sea Grant College Program
You can protect individual trees by placing wire around the trunk. To protect the overflow pipe it might be possible to construct a wire cage or other exclusion device. You can see photos at:

The local Illinois Department of Natural Resources district wildlife biologist can provide you with further information. I will send you his telephone number.

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