Earlier this summer, I made a call to WDFW Enforcement at Olympia, to enquire about filetting fish on the river. I was told it was ok, as long as identification was intact, such as fins or lack of, etc. Also the person told me that it was not legal to place the entrails into the river, and the health dept could issue citations for doing so.

I did mention that I doubt they would do so, even if they could. Not sure if this was just a personal opinion of the person I was talking to, or if it was for real. Maybe someone on the board knows more about it.
Catarafter