Oregon and Washington fishery managers adopted recreational spring Chinook salmon and steelhead seasons for the Columbia River Tuesday during a joint state hearing.   The season from Bonneville Dam to the Oregon/Washington border will run from March 16 to May 5, with a bag limit of two adult hatchery Chinook or Steelhead per day, but only one may be a Chinook.  Below Bonneville Dam the season will run from March 1 to April 4, with the same bag limit.  The overall forecasted return of adult spring Chinook to the Columbia River mouth of 143,200 fish is similar to last year’s actual return of 142,500.  However, the season-setting process is driven by the forecast for upriver-origin spring Chinook of 75,200 fish, which is lower than last year’s actual return of 81,300.