With upriver spring Chinook return on track to come in higher than originally forecast, fishery managers from Oregon and Washington added more recreational spring Chinook fishing days on the mainstem Columbia during a joint state hearing.  The expected upriver-origin adult spring Chinook return has been increased from 122,500 fish to 155,500.  As of Sunday, a total of 102,025 adult spring Chinook have passed Bonneville Dam, which is greater than the recent 10- and 5-year averages.  Anglers downstream of Bonneville Dam had their season extended through June 12, while upriver anglers will see an additional 25 spring Chinook fishing days, with retention open from Thursday to June 15 between Bonneville Dam and the Oregon-Washington state line upstream of McNary Dam.  The daily adult bag limit is two adult hatchery Chinook or steelhead per day, but only one may be a Chinook.