Andover has been managing town culvert sites that host beaver populations with devices that force and trap beaver dam building materials (sticks and brush) outside the culvert. This page provides information on: 1)  The history of the project

2)  How beaver deceivers work

3)  The progress of each site

4)  Reports on the management and condition of each site.

5) Summaries upgrades, repairs and costs 

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Each beaver deceiver site is being monitored by members of the Andover Conservation Commission on a regular basis.

Access to those reports, photos and management videos can be found by the site buttons to your left.

Management and clearing of sites are maintained by volunteers and communication of issues from citizens.

Most sites are managed twice a year and periodically after major storm events.

If you are concerned about a beaver deceiver then please report it to the town office (735-5332) so our volunteer group can determine what action to take. 

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Here is a PDF explaining the reasoning and history behind the installations and management of beaver deceivers in Andover.

Beaver deceivers simply act as baffles to keep debris from beaver activities out of the actual culvert. 

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1) A series of fences are constructed in front of the inflow side of the culvert. Sometimes these have two or even three layers to "baffle" and deceive beaver dam materials. 

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2) A large diversion pipe is installed and submerged to allow water further upstream to move uninhibited into the culvert. 

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3) A "filter" box - which looks like a wire cage is placed around the in flow of the fully submerged pipe. 

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See images below...

Here is a presentation on Beaver Natural history and their impact on the landscape. 

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