Flow devices are man-made solutions to beaver-related flooding problems. Flow devices are relatively cost-effective, low-maintenance solutions that regulate the water level of beaver dams and keep culverts open. Traditional solutions have involved the trapping and removal of all the beavers in an area. While this is sometimes necessary, it is typically a short-lived solution as beavers rapidly recolonize suitable habitat.
The most common beaver-related flooding issues that people encounter are caused by blocked road culverts or freestanding beaver dams. Beaver-related flooding issues can usually be resolved with properly designed and installed water control devices, also known as flow devices. Flow devices are either specially designed pipes installed through beaver dams, or pipe and/or fence systems that protect road culverts from being blocked. The beneficial effects of beavers on stream flow, riparian habitat, salmon and trout, and wetland creation can be sustained with application of these inexpensive technologies, which require little maintenance.