Many on here remember when salmon fishing was great; the '70's, the '80's, and even into the mid '90's. Several things have changed that have drastically affected salmon stocks. Ignorant people love to blame dams on the Columbia. Please correct me if I'm wrong, but I don't think any dams have been built since the '70's, no nope that's not it, so we can just move on from that argument.
ODFW, and WDFW estimate there are somewhere between 700-800 juvenile male California Sea Lions from the mouth of the Columbia upstream. Personally, I have no idea how accurate that count is, but I've seen the beach at the mouth of the Cowlitz, Kalama, and Lewis hold 50-75 per river when the smelt are in. Biologists say an adult California Sea Lion has to eat between 8 and 12 lbs. of food every day in order to survive. There are enough captive Sea Lions in zoo's, that probably proves that out to be true. So if the average need for food is 10lbs per day, multiplied by 700 animals...that's easy math, and an astounding number, and it's EVERY day! Add the estimated 15-20 thousand Cormorants that eat the smolt on the way out...I'm surprised there is a single fish make it back at all!
So what has changed? Oh there has been several factors as we all know, but I do know that there were NEVER this many salmon eaters in the Columbia since I've been around. We NEED to change something if we want any salmon to survive for our grandkids to enjoy.