Fishery managers from Oregon and Washington added ten additional fishing days for recreational spring Chinook downstream of Bonneville Dam during a joint state hearing this week.  Fishery biologists are now expecting a return of 122,400 upriver-origin adult Chinook, similar to the pre-season forecast of 121,000.  As of May 13, a total of 72,273 adult spring Chinook have passed Bonneville Dam, which is 89 percent of the 10-year average cumulative count and 123 percent of the 5-year average for this date.  Typically, 50 percent of spring Chinook have passed Bonneville Dam by May 11.  The season dates are now from Friday to Sunday this weekend, Saturday to Monday next weekend, and June 12 through June 15, from the Tongue Point/Rocky Point line upstream to Beacon Rock plus bank angling only from Beacon Rock upstream to the Bonneville Dam deadline.  The spring Chinook allocation for the mainstem upstream of Bonneville Dam has already been met, so this area will not reopen until the summer Chinook season begins both upstream and downstream of Bonneville Dam on June 16.