We have had hatch boxes for a number of years on the North Fork of the Nehalem. They are part of ODFW's S.T.E.P ( Salmon and Trout Enhancement Program). It has been a lot of fun in the past, and we have seen some increase returns on a couple little streams that we have planted the fry in. We have not done if for the past few years.
I am sure that any hatchery, or the ODFW main office could tell you more about the STEP program (if it still exists). Feel free to fire any questions at mee too
Good Luck
PeterMac