Here's a lesson on how to read the regulations...
For Willamette Zone, check page 48 of the regulations, the big box where it says "Regulations for this zone:". "Species" are listed in the left column, so go down to Salmon/Steelhead. Heading over to the rightmost column, titled "Season". The season says "Closed in all waters unless noted by species under Special Regulations."
Page 49 has the start of the big table saying "Special Regulations for this zone:". The water bodies are listed alphabetically. If you do not find the water body listed, then it is closed for salmon/steelhead angling.