Hagg Lake opens to fishing on Saturday Posted on March 5, 2015Author Michael TeaguePosted in Oregon Fishing Report, Willamette Valley/Metro Willamette, McKenzie & Santiam Rivers Fishing Report – Water flows at Willamette Falls are decreasing daily. Readings have dropped from 13,300 cfs to 11,200 cfs in the first five days… Read To access this post, you must purchase One Year Membership - Oregon.