A beaver dam analogue (BDA) is a habitat management tool that mimics a naturally occurring beaver dam. It is a simple structure installed in-stream and is often installed in series. There are many different ways to build BDAs which can include: upright posts (natural or manufactured fence posts), a natural weave material (typically willow, spruce, or other on-site vegetation), gravel, mud, wood chips, and sod (see image below).
BDAs use depends on the project goal, but their main purpose is stream restoration in degraded riparian systems, and/or to encourage beavers to resume normal activities for the stream's benefit. BDAs can be used specifically for beaver and fish habitat restoration, general habitat restoration to benefit multiple species including species-at-risk, and to encourage natural beaver recolonization.
*Please note that prior to the installation of any coexistence tool, it is important to check for permitting requirements with your local, provincial/state, and federal departments*
If you are interested in learning more about BDAs, please see the resources below, visit the Low-Tech Process-Based Restoration of Riverscapes website, or send us an email.
