In the nearly three million-acre Umpqua Basin, salmon populations have experienced similar periods of ebb and flow. Fortunately, the Umpqua Basin has decades of data on fish populations from its counting station at Winchester Dam on the North Umpqua River.  Data collected at this station are used extensively in helping to better understand and manage the fish resource in the Umpqua Basin. Click here for the Oregon Department of Fish and Wildlife Department's charts of both current and historical counts from Winchester Dam.