Pacific Rivers
Some ranchers have also embraced beaver-based restoration. A rancher named Jay Wilde from Mink Creek, Idaho spent years trying to restore perennial flow to Birch Creek, a seasonal stream on his land.
He grew up swimming and fishing in Birch Creek all summer long. But when Wilde took over the family farm from his parents in 1995, the stream was dry by mid-June. He realized this was partly because his family and neighbors, like generations of American settlers before them, had trapped and removed most of the dam-building beavers. The settlers also built roads, cut trees, mined streams, overgrazed livestock and created flood-control and irrigation structures, all of which changed the plumbing of watersheds like Birch Creek’s.
Wilde then tried numerous ways to improve stream conditions, but it wasn't until he incorporated beavers that he saw results. In 2015, he invited scientists to build 19 BDAs on the creek and release five beavers nearby. The following summer, the stream stayed wet for two months longer than usual, helping to irrigate his grazing meadows.
In just three years, those beavers built 149 dams, transforming the once narrow strip of green along the stream into a wide, vibrant floodplain. Birch Creek flowed for 42 days longer, through the hottest part of the summer. Fish rebounded quickly too: Native Bonneville cutthroat trout populations were up to 50 times as abundant in the ponded sections in 2019 as they were when surveyed by the U.S. Forest Service in 2000, before beavers went to work.
