Hagg Lake opens to fishing on Saturday Posted on March 5, 2015 by Michael Teague 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... To access this post, you must purchase Oregon Memberships – Steelhead or Oregon Memberships – Chinook.