Beaver Dam Analog Events
A beaver dam analog, or BDA, is a simple, low-tech structure designed to mimic natural dams built by beavers. They are made from pine posts, which are pounded into the ground across the streambed at short intervals. These posts are then weaved and filled with branches, rocks and mud, all collected from the surrounding landscape.
Why Are Beaver Dam Analogs Important?
BDAs help slow down water, especially during spring run-off, which in turn reduces erosion of the banks and the incision of the stream. Water backs up behind these semi-porous structures allowing sediment to settle out of the water column, keeping downstream water clean and clear (great for the trout in Big Cottonwood Creek)! Over time BDAs help recharge the ground water, reconnect streams to their floodplains and help encourage riparian vegetation, beneficial for all local wildlife.
What Are Beaver Dam Analog Events?
During a Beaver Dam Analog event, volunteers will hike tools to the work sites, help gather materials, such as dead and downed tree branches, and learn BDA construction techniques. The work involves weaving natural materials within and against the preinstalled posts to create structures in the steam channel. Winter events are considered “dry builds” of the structures, while spring events involve maintenance once the water returns to these areas. These opportunities offer volunteers great learning conditions and hands-on watershed restoration experience.
A Special Thanks To Our Partners. . .
“And a HUGE thanks to Kayleigh Mullen from Trout Unlimited for putting together the 2025 events as well as providing our readers with information about BDAs and their role in the environment.”
2026 Dates To Be Determined
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