Cougar Dam is a rockfill dam with a gated concrete spillway on the South Fork McKenzie River, east of Eugene, Oregon. The U.S. Army Corps of Engineers completed the dam in 1963 and it has blocked fish migration since then. So far, the Corps has modified the dam to allow for fish passage above the dam and for temperature modifications downstream. The Corps is looking to begin soliciting feedback from the community about its proposal to move these fish downstream.