Fishery managers from Oregon and Washington adopted revised spring Chinook salmon and steelhead seasons for the Columbia River during a joint state hearing.  In the Columbia above Bonneville Dam, the recreational Chinook season will be open from Monday, April 1 through Sunday, May 5.  The open area for both boat and bank anglers is from the Tower Island power lines approximately six miles below The Dalles Dam upstream to the Oregon/Washington border.  From the Tower Island power lines downstream to Bonneville Dam, only bank angling is allowed.  In the Columbia below Bonneville Dam, the modified recreational spring Chinook season will take place from Friday, March 1 through Wednesday, April 10.   The open area is from Warrior Rock upstream to Beacon Rock, plus bank angling only from Beacon Rock upstream to the Bonneville Dam deadline.  The season-setting process was complicated this year due to a below average forecast for upriver-origin spring Chinook of 99,300 fish and poor expected returns to the Cowlitz and Lewis rivers.  These regulations replace permanent rules that remain in effect through February.