Removal of dams on Sisquoc River tributaries expands the potential for restoration of steelhead. One tributary, Horse Creek (Horse Canyon), was dammed in 1968 and the 4.5 foot high, 60 foot wide dam eventually created a scour pool, increasing the drop to over 8 feet and creating an impassable barrier to spawning steelhead. The dam had completely silted in and no longer served to restrain sediment flows so was dynamited in 2006, and its sediment naturally eroded by 2011. A beaver dam created a large pool at the confluence of Horse Creek and the Sisquoc River and abundant steelhead trout were noted in a snorkel survey by fish biologist Matt Stoecker, including three fish 9 to 14 inches in size.